Operating Guide
This guide describes how to use the Agilent 53150A, 53151A, and 53152A
Microwave Frequency Counters. The information in this guide applies to
instruments having the number prefix listed below, unless accompanied
by a “Manual Updating Changes” package indicating otherwise.
SERIAL PREFIX NUMBER: 3735A, US3925, and US4050 (53150A)
3736A, US3926, and US4051 (53151A)
3737A, US3927, and US4052 (53152A)
Agilent 53150A/151A/152A
Microwave Frequency Counter
Download from Www.Somanuals.com. All Manuals Search And Download.
Description of the Microwave Frequency Counter xii
Options xiii
Accessories Supplied and Available xiv
Agilent 53150A/151A/152A Quick Reference Guide xv
1
Setting the Serial Port Baud Rate (Menu Example) 1-15
Offsetting a Frequency Measurement 1-20
Measuring Power (Channel 2 Only) 1-22
Selecting the Unit of Measurement for Power 1-23
Measuring Relative Power 1-24
Offsetting a Power Measurement 1-24
Operating Guide
iii
Download from Www.Somanuals.com. All Manuals Search And Download.
Contents
Increasing Profile Accuracy 1-27
Selecting a Power-Correction Profile 1-28
2
Other Function Selection Keys 2-10
Measuring Relative Frequency 2-20
Relative Frequency Example 2-20
Offsetting a Frequency Measurement 2-21
Frequency Offset Example 2-21
Measuring Power 2-24
Power Measurement Example 2-24
iv
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Contents
Offsetting a Power Measurement 2-27
Using the Menu 2-39
Do Self Test 2-43
Preset 2-45
RS-232 Serial Port Data Rate (BAUD) 2-46
Frequency Modulation (FM) 2-46
Channel 1 Low-Pass Filter (CH1 LPF) 2-46
Recall User Settings (RECALL) 2-46
Power Correction (PWR CORR) 2-46
3
Specifications
Introduction 3-2
A
Rack Mounting the Counter
Rack Mounting the Counter A-2
Operating Guide
v
Download from Www.Somanuals.com. All Manuals Search And Download.
B
C
Overview B-2
Status Messages B-2
Self-Test Messages B-3
Error Messages B-4
Replacing the Batteries C-4
Removing the Batteries C-4
Installing Batteries C-5
Charging the Batteries C-8
Precautions C-9
vi
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
In This Guide
This book is the operating guide for the Agilent 53150A (20 GHz), 53151A
table of contents, this preface, a quick reference guide, three chapters,
three appendices, and an index.
This preface contains the following information:
•
•
•
•
•
•
•
•
Contents and Organization
pg. viii
pg. ix
Description of the Microwave Frequency Counter
Options
pg. x
pg. xi
pg. xii
pg. xiii
pg. xiv
pg. xiv
Accessories Supplied and Available
Manuals Supplied
Operating Guide
vii
Download from Www.Somanuals.com. All Manuals Search And Download.
In This Guide
Contents and Organization
The Quick Reference Guide consists of a Menu Tree (tear-out sheet)
that serves as a tool to trigger your memory or get you quickly
reacquainted with the instrument.
Chapter 1 Getting Started is a quick-start guide that gives you a brief
overview of the Counter’s keys, indicators, menus, display, and
connectors. A graphical procedure for performing a measurement is
also provided.
Chapter 2 Operating Your Instrument is an operator’s reference.
You are given an overview of each group of front-panel keys, operating
through the operation of the Counter.
the Counter.
Appendix A Rack Mounting the Counter provides rack-mounting
procedures for the Counter.
Appendix B Messages lists and explains all of the messages that are
displayed on the Counter’s front panel and/or sent over the RS-232
serial interface.
Appendix C Using the Battery Option explains how to use the
Counter with the Battery option.
Index
viii
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
In This Guide
Related Documents
For more information on frequency counters refer to the following Series
200 Application Notes:
•
•
•
Fundamentals of Electronic Frequency Counters,
Application Note 200—Agilent part number 02-5952-7506.
Understanding Frequency Counter Specifications,
Application Note 200-4—Agilent part number 02-5952-7522.
Fundamentals of Time and Frequency Standards,
Application Note 52-1—Agilent part number 02-5952-7870.
Operating Guide
ix
Download from Www.Somanuals.com. All Manuals Search And Download.
In This Guide
Types of Service Available if Instrument Fails
If your Counter fails within one year of original purchase, Agilent will
repair it free of charge. If your instrument fails after your one-year
warranty expires, Agilent will repair it, or you can repair it yourself.
There are three types of repair services:
•
•
Standard repair service—if downtime is not critical.
Express Repair/Performance Calibration Service—if downtime
is critical.
•
Owner repair—repair the unit yourself using the Assembly-Level
Service Guide.
Standard Repair Services (Worldwide)
Contact your nearest Agilent Service Center to arrange to have your
Counter repaired.
Express Repair/Performance Calibration
Service (USA Only)
If downtime is critical, you can receive your repaired Counter via
overnight shipment. Just call 1-800-403-0801 and ask for Express
Repair/Performance Calibration Service. When your Counter is repaired,
it will be returned via overnight shipment.
Repair Instrument Yourself
If you choose to repair the instrument yourself or would like more details
on self test and calibration, use the procedures in the Assembly-Level
Service Guide.
x
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
In This Guide
Repackaging for Shipment
For the Express Repair/Performance Calibration Service described above,
return your failed Counter to the designated Agilent Service Center,
using the instrument’s original shipping carton (if available). Agilent
notifies you when your failed instrument is received.
If the instrument is to be shipped to Agilent for service or repair, be sure
you do the following:
•
Attach a tag to the instrument identifying the owner and indicating
the required service or repair. Include the instrument model number
and full serial number.
•
•
Place the instrument in its original container (if available) with
appropriate packaging material.
Secure the container with strong tape or shipping bands.
If the original shipping container is not available, place your unit in a
container with at least 4 inches of compressible packaging material
around all sides of the unit. Use static free packaging materials to avoid
additional damage to your unit.
Agilent suggests that you always insure shipments.
Operating Guide
xi
Download from Www.Somanuals.com. All Manuals Search And Download.
In This Guide
Description of the Microwave Frequency
Counter
The Agilent 53150A, 53151A, and 53152A Microwave Frequency Counters
are capable of measuring frequencies from 10 Hz to 125 MHz on Channel 1
and from 50 MHz to 20 GHz (53150A), 26.5 GHz (53151A), and 46 GHz
(53152A) on Channel 2. These frequency counters are also capable of
measuring power on Channel 2 (in the same frequency ranges). All three
Counters have a maximum frequency resolution of 1 Hz.
The Agilent 53150A/151A/152A provides GPIB and RS-232 serial
interfaces and are suitable for bench-top and ATE operation.
The basic measurement functions of the Agilent 53150A/151A/152A
include Frequency, Relative Frequency, Frequency Offset, and Power
(including Power Offset and Relative Power). All of these features are
accessible from the front panel and over the GPIB and RS-232 interfaces.
The Agilent 53150A/151A/152A includes the following additional
measurement functions and features that are designed specifically for
manufacturing and service applications:
•
•
1, 2, 5, and 10 MHz external reference capability
Optional high-stability oven oscillator for high-accuracy needs and
lengthened calibration cycles
•
•
•
Frequency and power offset capabilities for relative measurements
SCPI programming capability
Battery and dc input option for operation in locations where AC
power is unavailable
•
Optional soft carrying case for safe transportation and mobile use
Programmable control is performed via an GPIB or an RS-232 serial
interface. The GPIB and RS-232C ports are standard for the Agilent
53150A, 53151A, and 53152A.
xii
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
In This Guide
Options
The options available for the Agilent 53150A/151A/152A are listed below.
Specifications for the options are listed in Chapter 3, “Specifications.”
Options ordered with the Counter are installed at the factory and are
ready for operation on delivery. Refer to the "Retrofitting Options" chapter
in the Agilent 53150A/151A/152A Assembly-Level Service Guide for
information on installing options in the field.
Hardware
•
•
•
•
High Stability Oven Timebase, Option 001
Battery/DC Power Input, Option 002
Rack Mount Kit, Option 1CM
Soft Carrying Case, Option 007
Support
•
•
•
3-year Return to Agilent for Repair, Option W30
3-year Return to Agilent for Calibration, Option W32
3-year Return to Agilent for Standards Compliant Calibration,
Option W34
•
•
•
5-year Return to Agilent for Repair, Option W50
5-year Return to Agilent for Calibration, Option W52
5-year Return to Agilent for Standards Compliant Calibration,
Option W54
Retrofit
•
Options 001 and 002 can be installed only by authorized Agilent
Technologies Repair Centers.
Operating Guide
xiii
Download from Www.Somanuals.com. All Manuals Search And Download.
In This Guide
Accessories Supplied and Available
Accessories Supplied
•
•
Power cord, 2.3 meters (Part number dependent upon destination country)
Fuse (Agilent P/N 2110-0007)
Accessories Available
•
•
•
•
•
Soft Carrying Case, (Agilent P/N 53150-80016)
Automotive Power Adapter (Agilent P/N 53150-60214)
Battery (Agilent P/N 53150-80010)
GPIB Cables (Agilent P/N 10833A/B/C/D)
RS-232 Cable (Agilent P/N 53150-60215)
Manuals Supplied
Agilent 53150A/151A/152A Operating Guide
(Agilent P/N 53150-90013)
Agilent 53150A/151A/152A Programming Guide
(Agilent P/N 53150-90014)
Agilent 53150A/151A/152A Assembly-Level Service Guide
(Agilent P/N 53150-90015)
xiv
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Agilent 53150A/151A/152A
Quick Reference Guide
The Quick Reference Guide is designed for experienced
users of the Agilent 53150A, 53151A, and 53152A. It is
intended to be used as a tool to trigger your memory.
If you are using the Counter for the first time, Agilent
recommends that you at least read Chapter 1, “Getting
Started,” first.
The Quick Reference Guide, which follows this page,
consists of a menu tree that may be torn out of the guide
for external use.
xv
Download from Www.Somanuals.com. All Manuals Search And Download.
xvi
Download from Www.Somanuals.com. All Manuals Search And Download.
Agilent 53150A/151A/152A
Frequency Counter
nff
e
/
Menu
Reset/
Local
REF OSC > INT
REF OSC > EXT
PRESET
< 00-111-222 >
< SN 999999 >
53150A
>
<OPTNS -- -- -- -- >
SAVE
> 0 to 9
OP 9999 HRS
RECALL > 0 to 9
BATT VOLTAGE
0.0
CH1 LPF > OFF
CH1 LPF > ON
Freq
Pwr
Offset
Offset
Avg
GPIB
Resol
Rate
DO SELF TEST
PWR CORR > OFF
FM
FM
> AUTO
>
OFF
00 000 000 000 000
49 999 999 999 999
00.00
99.99
GPIB ADDR
>
0
PWR CORR >
PWR CORR >
0
to
9
BAUD
BAUD
BAUD
BAUD
BAUD
BAUD
>
>
>
>
>
>
9600
4800
GPIB ADDR > 30
2400
1200
Freq
Pwr
Offset
Offset
GPIB
Resol
19200
14400
Rate
Avg
RESOL
1 HZ
RATE
RATE
RATE
RATE
FAST
MED
AVERAGES 01
AVERAGES 99
RESOL 10 KHZ
RESOL 100 KHZ
SLOW
HOLD
RESOL
1 MHZ
QR-1
Download from Www.Somanuals.com. All Manuals Search And Download.
QR-2
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
The Front Panel at a Glance
The Front Panel at a Glance
1
2
3
4
20 GHz Counter
Hz
53150A
CHANNEL 1
10 Hz to 125 MHz
GHz
MHz
kHz
POWER
Ch 12
Rel Freq
1M Ω
Offset
Ext Rel
Hold
dB
Avg On
dBm
Watts
mW
uW
Rate Rmt SRQ
Rel Pwr
Error
Shift
DAMAGE
+30 dBm
Offset
%
Standby
Menu
FREQ
Gate
POWER
Channel 2
dBm/ W
CHANNEL 2
50 MHz to 20 GHz
DAMAGE
+27 dBm
MODIFY
Freq
Offset
Pwr
Offset
GPIB
Reset/
Local
Rate
Avg
Resol
Chan
Select
Display
Power
50 Ω
On/Off
Clear
Rel Freq
Rel Pwr
Shift
+/-
Enter
Offset
On/Off
Offset
On/Off
20 19 18 17 16 15 14 13
12 11 10 9 8
7
6
5
1 Standby indicator
11 Selection keys active indicator
12 Selection (arrow) keys
13 Resolution / GPIB key
14 Enter key
2 Power/Standby switch
3 LCD display
4 Channel 1 input connector
5 Channel 2 input connector
15 Average / Power Offset key
16 Sign (+/–) key
6 Display Power / dBm/W key (Channel 2)
7 Offset On/Off / Relative Power key
17 Rate / Frequency Offset key
18 Clear / Backlight On/Off key
19 Reset/Local / Menu key
20 Shift key
(Channel 2)
8 Channel Selection key
9 Offset On/Off / Relative Frequency key
10 Gate indicator
1-2
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
The Front Panel Indicators at a Glance
The Front Panel Indicators at a Glance
The front panel includes three LED indicators. These are listed and
described in the following table.
Indicator
POWER
Description
The Standby indicator is lit whenever the Main ~
Power switch on the rear panel is turned ON, and
the POWER switch on the front panel is OFF (out).
During Standby, most of the instrument’s circuits do
not receive power. However, the timebase and the
cooling fan are powered so that the temperature in
the timebase components remains stable, and if the
Battery option is installed, the battery-charging
circuits are powered. When you press the POWER
switch on the front panel, the Standby indicator goes
off, and all of the Counter’s circuits receive power.
Standby
When the LED indicator between the arrow keys
flashes, the arrow keys can be used to navigate and
change values in menus.
When you make a change in a menu, always press
the Enter key to save the setting and exit the menu.
The Gate LED indicator flashes to indicate the rate
at which measurements are triggered. The flash rate
of the LED varies with the settings of the
measurement rate (Rate key) and the measurement
resolution (Resol key). The flash rate of the LED
provides a rough indication of the number of
measurements that are being taken in a given period
of time.
FREQ
Gate
Chan
Select
NOTE
It is normal for the fan in the Counter to run when the Counter is in
Standby mode. Power is supplied to the timebase whenever the
Main ~ Power switch is on to maintain long term measurement reliability,
and the fan helps maintain timebase temperature stability.
Operating Guide
1-3
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
The Front Panel Menus at a Glance
The Front Panel Menus at a Glance
Shift
Menu
Reset/
Local
REF OSC > INT
PRESET
53150A
REF OSC > EXT
SAVE 0 to 9
RECALL > 0 to 9
<
00-111-222
>
<
SN 999999
>
>
<OPTNS -- -- -- --
>
>
OP 9999 HRS
BATT VOLTAGE
0.0
CH1 LPF
CH1 LPF
>
>
OFF
ON
DO SELF TEST
PWR CORR > OFF
FM
FM
>
AUTO
OFF
>
PWR CORR >
PWR CORR >
0
to
9
BAUD
BAUD
BAUD
BAUD
BAUD
BAUD
>
9600
4800
>
>
>
>
>
2400
1200
19200
14400
Shift
GPIB
Rate
Avg
Resol
Resol
RESOL
1 HZ
RATE
FAST
MED
AVERAGES 01
AVERAGES 99
GPIB ADDR
GPIB ADDR
0
RESOL 10 KHZ
RESOL 100 KHZ
30
RATE
RATE
RATE
SLOW
HOLD
RESOL
1 MHZ
1-4
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
The Display Annunciators at a Glance
The Display Annunciators at a Glance
GHz
MHz
kHz
Hz
Ch 12
Rel Freq
Offset
Ext Rel Hold
Rate Rmt SRQ
dB
Avg On
dBm
Watts
mW
uW
Rel Pwr
Offset
Error
Shift
%
Annunciator Description
Ch 1 or Ch 2 Indicates which channel is selected to measure an input signal.
Freq
Indicates that the value displayed is a frequency reading.
Rel Freq
The displayed frequency value is relative to a previously zeroed value.
Freq
The displayed frequency value is offset by a previously entered frequency value.
Offset
Avg On
The displayed frequency value is the result of a number of individual frequency
measurements that have been averaged.
Pwr
The Counter is set to measure Power (Channel 2 only).
Rel Pwr
The displayed power measurement is relative to a previously zeroed power value.
The displayed power value is offset by a previously entered power value.
Pwr
Offset
dB, dBm, W, Indicates the unit of measurement for the currently displayed power value.
mW, µW, %
Provides a real-time analog representation of the Power measurement (intended for
peaking and similar procedures).
Ext Ref
Hold
The Counter is using an external reference signal for frequency measurements.
Indicates the Counter is in Hold (single-measurement) mode.
Rmt, SRQ
Shows the current state of the GPIB interface
(Rmt = Remote operation via GPIB; SRQ = Service ReQuest).
Error
Shift
Indicates that a front-panel key command is unacceptable in the current context.
Indicates that all front-panel keys are redefined to the function printed above the key.
Shows the amount of charge in the batteries (if the Battery option is installed).
Operating Guide
1-5
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
The Display Special Characters at a Glance
The Display Special Characters at a Glance
Special
Description
Characters
Points to the current value for a Menu setting.
Indicates that the value for the current Menu setting can be
changed using the selection (arrow) keys.
When the letter “c” is displayed in the hundredths position of
the power display, Power Correction mode is in effect.
NOTE
The first two special characters shown above are intended to help you
navigate within the Menu. When the right pointer ( ) is flashing, it
indicates the current setting for the selected Menu option. When the left
pointer ( ) is flashing, it indicates that you can use the selection (arrow)
keys to change the setting for the current Menu option.
1-6
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
The Rear Panel at a Glance
The Rear Panel at a Glance
1
2
3
4
5
6
Made in U.S.A.
with domestic and foreign content
ISM 1-A
OPTIONS
001 Oven Time Base
002 Battery
Main ~ Power
Reference 10 MHz
Auxillary
WARNING:
In
To avold electric shock,
do not remove covers.
No user-serviceable parts inside.
or
Out
Refer all servicing to qualified personnel.
This unit must be earth grounded.
11 TO 18 VDC
EXT DC
AC POWER
100 – 130 VAC, 50/60/400 Hz 75 VA
220 – 240 VAC, 50/60 Hz 75 VA
FUSE
1.0 A T
250 V
RS-232
10
9
7
8
1 AC Input/Power module (Senses
incoming voltage and adjusts
automatically)
5 Battery compartment (optional) or cover plate
6 GPIB (IEEE-488.1) Interface connector
7 RS-232 Interface connector (RJ12)
8 Main AC Power On indicator
2 External Reference connector (BNC)
1, 2, 5, or 10 MHz Input
10 MHz Output
9 EXT DC power-input connector (functional only
when Battery option is installed)
3 Fuse Holder (behind door)
10 Main ~ Power switch
4 Auxiliary connector (reserved)*
* The Auxiliary connector is not installed on standard production units.
Operating Guide
1-7
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Operating the Counter
The procedures in this section are designed to familiarize you with the
Frequency Counter’s features and controls. Agilent suggests that you
follow the steps for each of these procedures, even if you do not presently
need to make any measurements or to adjust any of the Counter’s settings.
The following procedures are provided:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Turning the Counter On
Turning the Display Backlight Off or On
Selecting an Input Channel
Using the Menu
Setting the Serial Port Baud Rate
Measuring Frequency
Measuring Relative Frequency
Offsetting a Frequency Measurement
Measuring Power
Measuring Relative Power
Offsetting a Power Measurement
Using Power Correction
Setting the Measurement Rate
Setting the Number of Averages
Setting the Resolution
1-8
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
The following legend defines the meanings of the icons used throughout
this chapter.
Legend
5
6
1
2
3
4
7
8
9
1
2
Press key one
time and release
3
Result
7
8
9
Indicator off
4
5
6
Auto operation
Connect signal
Disconnect signal
Indicator on
Multiple key
presses
Indicator flashing
Operating Guide
1-9
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Turning the Counter On
To turn on the Counter, turn on the Main ~ Power switch on the rear panel
(see page 1-7), and then press and release the POWER button on the
front panel.
POWER
Ch 12
Rel Freq
Offset
Ext Rel Hold
Rate Rmt SRQ
dB
Avg On
Rel Pwr
Offset
dBm
Watts
mW
uW
Error
Shift
Standby
%
Ch
2
Freq
1-10
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
NOTE
NOTE
If a signal was applied to the Channel 2 input connector prior to turning
on the Counter, CH2 NO SIGNAL is displayed momentarily. As soon as the
Counter acquires the input signal, it displays the signal’s value.
The internal Reference Oscillator requires 10 to 15 minutes to reach a
stable operating temperature. Since the Reference Oscillator receives
power only when the Counter is on or in Standby mode, no measurements
should be taken unless the Counter’s Main ~ Power switch has been in the
on (1) position for at least that amount of time.
Turning the Display Backlight Off or On
When you first turn the Counter on, the backlight for the LCD display is
always lit. You can toggle the backlight off and on by pressing the Shift
key and then the
On/Off (Clear) key, as shown below.
Ch
2
Freq
Shift
Shift
On/Off
Clear
Ch
2
Freq
Ch
2
Freq
Shift
Shift
On/Off
Clear
Ch
2
Freq
NOTE
If your Counter has the Battery option, you can extend the length of time the
Counter can operate from the batteries by turning off the display backlight.
Operating Guide
1-11
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Using the Menu
The Agilent 53150A/151A/152A Counter has one menu that you use to
control a number of the Counter’s features and functions.
Displaying the Menu
To display the Menu, press the Shift key and then the Menu (Reset/Local)
key, as shown below.
Ch
2
Freq
Shift
Shift
Menu
Reset/
Local
Navigating in the Menu and Changing Settings
Use the Selection (arrow) keys to navigate to the setting you want to
change and then to actually make the changes. For example, the diagram
on the next page shows how to change the setting of the Reference
Oscillator from INTernal to EXTernal. (In this example, a reference signal
is applied to the External Reference connector, but no signal is applied to
the Channel 2 input.)
NOTE
The Counter will not switch to EXTernal unless a suitable reference
signal is available at the External Reference connector.
1-12
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Ch
2
Freq
Shift
Shift
Menu
Reset/
Local
Ch
2
Enter
Ext Ref
When you select the Menu, the indicator between the arrow keys flashes
to indicate that the arrow keys are now active. Since the Reference
Oscillator setting is the first one displayed when you invoke the Menu
(unless you’ve used the Menu to change another setting since you turned
the Counter on), you don’t have to use the
(down-arrow) key to get to it.
(up-arrow) key or the
Operating Guide
1-13
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
When you press the (right-arrow) key, the flashing annunciator ( )
changes direction, and the current setting for the Reference Oscillator
(INT [internal] or EXT [external]) flashes. This indicates that you can now
change this setting. Use either the up-arrow key or the down-arrow key to
change the setting.
If there are more than two settings available for the currently selected
function, you can cycle through the available settings by repeatedly
pressing either the up-arrow key or the down-arrow key. For example, to
change the setting for the Baud rate for the serial port, use the sequence
on the next page.
Press either the Enter key or the left arrow key to accept the currently
displayed setting. The Enter key accepts the setting and exits the Menu;
the left arrow key accepts the setting but does not exit the Menu. Use the
left arrow key to accept a setting if you want to change additional menu
settings. The Clear key reverses an unaccepted setting change.
You navigate to and adjust the remaining settings available in the Menu
provide information only (no settings are required [or possible] for these),
such as Battery Voltage, Operation Hours, and information that identifies
the Counter (Agilent model number, firmware version number, serial
number, and installed option codes). These menu options and the ones
described below are shown in “The Front Panel Menus at a Glance” on
page 1-4.
There is also a menu item called Preset and one called Do Self Test. If you
press the Enter key while PRESET is displayed, all of the Counter’s
settings are returned to the factory-default settings. If you press Enter
while DO SELF TEST is displayed, the Counter repeats the tests that are
normally performed when the Counter is first turned on.
NOTE
Remember to terminate each value you change in any of the menu options
by pressing the Enter key or the left arrow key. You can abort a change to
any menu option while the Menu is displayed by pressing the Reset/Local
key or the Clear key. Both keys nullify any changes you made to the
current menu option, but they do not affect any changes to other menu
options. The Clear key terminates the current menu session, but the
Reset/Local key does not.
1-14
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Measuring Frequency
The following diagram shows the basic sequence to use to make a
frequency measurement using Channel 1. This example assumes that the
Counter is on and has completed the Self Test. For the purposes of this
example, use the 10 MHz reference output on the Counter’s rear panel as
a signal source for input to Channel 1.
Ch
2
Freq
CHANNEL 1
10 Hz to 125 MHz
Ch
2
Freq
1M Ω
DAMAGE
+30 dBm
Ch
1
Freq
Chan
Select
Ch
1
Freq
The same procedure applies to making a basic frequency measurement on
Channel 2. However, since Channel 2 is automatically selected when you
turn on the Counter, the channel-selection step is unnecessary (unless you
previously selected Channel 1).
CAUTION
The Channel 2 input path circuits contain sensitive GaAs semiconductors.
To prevent damage to these components, always adhere to standard ESD
(Electro-Static Discharge) prevention procedures, and ensure that the
maximum power specification for this channel (+27 dBm) is not exceeded.
Operating Guide
1-17
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
NOTES
The Counter displays CH2 NO SIGNAL or CH1 NO SIGNAL and shuts
down all unnecessary circuits when a signal of insufficient amplitude
(or no signal) is applied to the corresponding input. This extends the
reliability of the affected components, and if the Battery option is
installed, extends the length of time the Counter can operate from
the batteries.
When the frequency of a signal applied to the Channel 2 input exceeds the
maximum rated frequency for the instrument, the Counter displays CH2
TOO HIGH.
CAUTION
The 2.9 mm Planar Crown* connector used for the Channel 2 input on the
Agilent 53152A must be handled with care to prevent damage and/or
contamination, especially since it acts as a wave guide as well as an
electrical connection. Observe the following precautions when handling
this connector:
1. If you remove the outer portion of the connector, do not touch the
exposed surfaces of either part of the connector with your bare skin or
any material that is not intended for cleaning this type of connector.
2. Avoid dropping or striking either portion of the connector.
If the connector becomes contaminated, it can be cleaned with isopropyl
alcohol and a lint-free cloth or other suitable cleaning implement.
®
* Planar Crown is a registered trademark of Weinschel Corp.
1-18
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Measuring Relative Frequency
You can measure the difference in frequency from one measurement to
another (drift) using the Relative Frequency function. You do this by
pressing the Shift and Rel Freq (Offset On/Off) keys as shown in the
diagram below (this example assumes that a signal is currently applied
to Channel 1).
The Counter stores the current frequency reading when you press the
Rel Freq key. It then subtracts this value from all subsequent readings
and displays the difference until you press the Rel Freq key again.
Ch
1
Freq
Ch
1
Freq
Shift
Shift
Rel Freq
Ch
1
Rel Freq
Offset
On/Off
NOTE
If the input signal fluctuates, the value displayed varies as the Counter
continues to take measurements. You can vary the speed at which
measurements are taken by varying the settings for Rate and Resolution
(see “Setting the Measurement Rate” and “Setting the Resolution” on
pages 1-32 and 1-34).
Operating Guide
1-19
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Offsetting a Frequency Measurement
You can use the Frequency Offset (Freq Offset) function to add or subtract
a constant value to/from a frequency measurement. For example, you can
use an offset to compensate for a systematic error or to display the
difference in frequency between two signals.
NOTE
The Frequency Offset and Relative Frequency functions can be used
simultaneously.
To display an offset frequency measurement, you need to set the value and
sign (+/–) of the offset and to turn the Frequency Offset function on. In the
diagram on the next page, the Frequency Offset function is enabled first,
and the offset value is then entered. However, the order doesn’t matter,
so you can also enter the offset value first, and then turn the offset
function on.
NOTE
When you are entering a value for Frequency Offset (or Power Offset),
you can use the Reset key to restore all of the displayed digits to zero.
These are the only two functions in which the Reset key has this effect.
1-20
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Ch
2
Freq
Ch
2
Freq
Offset
On/Off
Offset
Ch
2
Freq
Shift
Offset
Shift
Freq
Offset
Freq
Offset
Rate
Freq
Offset
Freq
Offset
+/-
Ch
2
Freq
Enter
Offset
Operating Guide
1-21
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Measuring Power (Channel 2 Only)
The Agilent 53150A/151A/152A Counter can measure signal power (in the
same frequency ranges as for frequency measurements) on Channel 2.
The example procedure for measuring power in the following diagram
assumes that the Counter has previously been set up to measure a 25 GHz
input on Channel 2.
NOTE
When the power of a signal applied to the Channel 2 input exceeds the
maximum rated power for the instrument, the Counter displays HI.
CAUTION
The Channel 2 input path circuits contain sensitive GaAs semiconductors.
To prevent damage to these components, always adhere to standard ESD
(Electro-Static Discharge) prevention procedures, and ensure that the
maximum power specification for this channel (+27 dBm) is not exceeded.
Ch
2
Freq
Ch
2
Freq
Display
Power
dBm
Pwr
1-22
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Selecting the Unit of Measurement for Power
The Counter’s power-measurement function can display values in either
of two sets of units of measurement—dB and dBm or W, mW, and µW
(the Counter automatically selects the most appropriate unit when either
set of units is selected). Use the procedure in the following diagram to
select the unit of measurement for power (this procedure assumes that a
signal is currently applied on Channel 2 and that power is being displayed):
Ch
2
Freq
dBm
Pwr
Ch
2
Freq
Shift
dBm
Pwr
Shift
dBm/W
Display
Power
mW
Pwr
NOTE
The Counter is specified for signals having amplitudes of up to +7.00 dBm.
If a signal having an amplitude greater than +9 or +10 dBm is applied,
and power measurement is enabled, the annunciators for the power
reading display “HI” to indicate that the signal’s amplitude exceeds the
specification. If a signal having an amplitude of less than –40.00 dBm is
applied, the power annunciators display “LO” to indicate that the signal
level is too low to be measured by this instrument.
CAUTION
The Channel 2 input path circuits contain sensitive GaAs semiconductors.
To prevent damage to these components, always adhere to standard ESD
(Electro-Static Discharge) prevention procedures, and ensure that the
maximum power specification for this channel (+27.00 dBm) is not exceeded.
Operating Guide
1-23
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Measuring Relative Power
You can measure the difference in power from one measurement to
another (drift) using the Relative Power function. You do this by pressing
the Shift and Rel Pwr (Offset On/Off) keys, as shown in the diagram below
(this example assumes that a signal is currently applied to Channel 2).
The Counter stores the current power reading when you press the
Rel Pwr key. It then subtracts this value from all subsequent readings
and displays the difference until you press the Rel Pwr key again.
Ch
2
Freq
dBm
dBm
dB
Pwr
Ch
2
Freq
Shift
Pwr
Shift
Rel Pwr
Ch
2
Freq
Offset
On/Off
Rel Pwr
Offsetting a Power Measurement
You can use the Power Offset (Pwr Offset) function to add or subtract a
constant value to/from a power measurement. For example, you can use
an offset to compensate for a systematic error or to display the difference
in power between two signals.
NOTE
The Power Offset and Relative Power functions can be used simultaneously.
To display an offset power measurement, you need to set the value and
sign (+/–) of the offset and to turn the Power Offset function on. In the
following diagram, the Power Offset function is enabled first, and the
1-24
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
offset value is then entered. However, the order doesn’t matter, so you can
also enter the offset value first, and then turn the offset function on.
Ch
2
Freq
dBm
Pwr
Rel Pwr
Ch
2
Freq
Offset
On/Off
dB
Pwr
Offset
Ch
2
Freq
Shift
dB
Pwr
Offset
Shift
Pwr
Offset
Avg
dB
Pwr
Offset
dB
Pwr
Offset
+/-
dB
Pwr
Offset
Ch
2
Freq
Enter
dB
Pwr
Offset
Operating Guide
1-25
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Using Power Correction
The Power Correction function in the main Menu allows you to set the
Counter to automatically compensate for power loss (or gain) that occurs in
the test configuration, such as attenuation resulting from cable impedance.
You can choose from nine power-correction profiles that are stored in
nonvolatile memory, and you can modify the contents of these profiles.
Each profile is defined by two to ten data points (a data point consists of
a loss value and a frequency value). When Power Correction is enabled,
the Counter automatically adds a correction to the power reading
(determined from the data points in the profile) that compensates for the
loss (or gain) at the frequency being measured. When a measured
frequency does not match any of the frequency values defined in the
currently selected profile, the Counter interpolates for the measured
frequency to determine the appropriate value to add to the power
measurement. The correction profiles require a minimum of two data
points per profile.
Power Correction Theory of Operation
When the Counter interpolates between data points to determine the
amount of correction to apply to the current measurement, it computes
the correction based on a straight line plotted between the frequency
values in the two closest data points. Therefore, a graph of a power-
correction profile would show a “curve” that consists of two to nine
straight-line segments, rather than a true curve, as shown below.
P
o
w
e
r
F r e q u e n c y
1-26
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
NOTE
As the graph shows, the Counter never computes power-correction values
for loss above the zero axis. Conversely, corrections are never computed
for gain below the zero axis. Once the correction value reaches the zero
axis, no further corrections are applied.
When the Counter interpolates for frequencies that are above or below the
range of frequencies specified in the currently selected profile, it never
computes a value that would fall on the opposite side of the zero axis from
the closest specified frequency. In other words, if there are two or more
data points that contain loss values, the Counter never computes or
applies a correction that would be indicative of gain. Conversely, if there
are two or more data points that contain gain values (negative loss values),
the Counter never applies a correction that would be indicative of loss.
Since there can be no further change in the loss or gain values once the
zero axis is reached, no power corrections are applied when the input
frequency reaches or passes a point in the profile that intersects the zero
axis. Effectively, the Counter computes only loss-correction values or
gain-correction values—never both within the same profile.
When you enter values in power-correction data points and then exit the
data-point display (using either the left-arrow key or the Enter key), the
Counter immediately sorts all of the data-points into order by the
frequency values. Therefore, if you enter a pair of values in a data point,
exit the data-point display, and then immediately return to the display for
that data point, you may see different values than the ones you just
entered. The values you entered may now be contained in a differently
numbered data point in the same profile, if they were previously entered
out of order by frequency.
Increasing Profile Accuracy
To increase the accuracy of a power-correction profile, you can add data
points between the existing data points in the profile (if less than 10 data
points are in use), thus bringing the data points closer together and
shortening the straight-line segments. If all ten data points are in use,
you can add data points by using two or more profiles for a single test
configuration. If you do this, you must select the profile you need (from the
Menu) for the range of frequencies being measured. This means that you
must select a different profile whenever the measured frequency moves
outside the range of frequencies defined by the data points in the
currently selected profile.
Operating Guide
1-27
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Selecting a Power-Correction Profile
The diagram on page 1-29 shows how to turn Power Correction on or off
and how to select a power-correction profile.
NOTE
Pressing the Enter key when the number of a power-correction profile
(1-9) is displayed selects that profile, enables Power Correction, and exits
press the right-arrow key instead of the Enter key to select the
power-correction profile without exiting the Menu.
Entering Data Points in a Power-Correction Profile
The diagram on page 1-30 shows how to enter data points (frequency and
loss values) in power-correction profiles. A minimum of two valid data
points is required for Power Correction; you can enter up to ten data
points in each power-correction profile. Each of the power-correction
profiles initially contains two valid data points—0.0 dB loss at 1 GHz,
and 0.0 dB loss at the highest frequency the Counter can measure
(20 GHz for the 53150A, 26.5 GHz for the 53151A, or 46 GHz for the 53152A).
The remaining eight data points contain values of 0.0 dB loss at 0.0 GHz.
When entering data, you can change the values in an existing data point
or enter new values in a data point that currently has zero values.
1-28
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Ch
2
Freq
dBm
Pwr
Ch
2
Freq
Shift
dBm
Pwr
Shift
Menu
Reset/
Local
Ch
2
Freq
Enter
dBm
Pwr
Shift
NOTE
When Power Correction is enabled, a lower-case letter “c” is displayed in
the hundredths position of the power display.
Operating Guide
1-29
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
NOTES
Pressing the Enter key after entering values exits the Menu and restores
the measurement display. To remain in the Power Correction menu so you
can enter or change values in another data point in the currently selected,
press the left-arrow key repeatedly (after entering the values for a data
point) until “PWR CORR” is re-displayed, and then press the up- or down-
arrow key to choose the next data point you want to edit.
When you are entering or editing values in data points, the 10 single-line
annunciators that are part of the analog power display are used to
indicate which data point is being displayed. The left-most annunciator
indicates that the data displayed is contained in the lowest data point,
data point 1. When the first two annunciators on the left are activated,
this indicates data point 2, and so on through data point 10, which is
indicated by all 10 annunciators.
The Power Correction function can be used to correct for gain from
amplification as well as for loss from attenuation. Since Power Correction
is intended primarily to correct for loss, loss values are entered as positive
numbers. To enter values for gain, use the Sign key (+/–) to change the
sign of the value you enter.
Operating Guide
1-31
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Setting the Measurement Rate
The measurement rate determines how frequently the Counter takes
measurements. You can set the measurement rate to FAST, MED
(medium), SLOW, or HOLD (single measurement taken each time you
press the Reset/Local key).
Ch
2
Freq
Rate
Ch
2
Freq
Enter
Hold
1-32
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Setting the Number of Averages
You can set the number of measurements the Counter takes and averages
before displaying the result. The default setting is one (no average
computations are performed when the number of averages is set to one),
and the maximum setting is 99. Note that the tens position (10 through 90)
and the units position (0 through 9) are adjusted separately, and that you
cannot set the number of averages to zero.
Ch
1
Freq
Avg
Ch
1
Freq
Enter
Enter
Avg On
Ch
1
Freq
Avg On
Operating Guide
1-33
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
NOTE
For most of the Counter’s settings, when you continue to press either the
up-arrow or the down-arrow key when you reach the end of the available
settings, the value for the setting “rolls over” to the value at the opposite
end of the range. For example, if the GPIB address is set to 31, and you
press the up-arrow key, the value changes to one.
However, when you adjust the value in the units position for the number
of measurements to be averaged, rollover does not occur. If you press the
up-arrow when the value in the tens position is zero and the value in the
units position is nine, or if you press the down-arrow when the value in
the tens position is zero and the value in the units position is one, there is
no change. If the value in the units position could roll over (in either
direction), it would allow you to set a value of zero for the number of
averages. Since at least one measurement must be taken, zero is an
illegal value.
NOTE
When the resolution setting is high (e.g., 1 Hz), and a large number of
averages is selected, it takes a considerable amount of time for the
Counter to take the measurements, compute the averages, and display a
reading. As a result, the rate at which the display is updated is
considerably slower than at small numbers of averages and lower
resolution settings. For example, when the resolution is set to 1 Hz,
and the number of averages is set to 60, a new reading is displayed every
60 seconds (approximately).
Setting the Resolution
Since less time is required to compute each measurement as the
resolution of the measurements is reduced, the resolution setting affects
the rate at which measurements are taken and displayed, as well as the
number of digits displayed for the measurements. As a result, the rate at
which the Gate indicator flashes changes when you change the resolution.
As shown in the procedure in the diagram on the next page, the available
resolution settings are 1 Hz (the default setting), 10 Hz, 100 Hz, 1 KHz,
10 KHz, 100 KHz, and 1 MHz.
1-34
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
Ch
2
Freq
Resol
Ch
2
Freq
Enter
Operating Guide
1-35
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 1 Getting Started
Operating the Counter
1-36
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Introduction
Introduction
Agilent 53150A/151A/152A Microwave Frequency Counter.
Chapter Summary
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
pg. 2-3
pg. 2-4
pg. 2-5
Numeric Entry
pg. 2-6
Changing States
pg. 2-7
Acknowledging Messages
pg. 2-9
Other Function Selection Keys
Measuring Frequency
pg. 2-9
pg. 2-10
pg. 2-12
pg. 2-14
pg. 2-17
pg. 2-20
pg. 2-21
pg. 2-24
pg. 2-26
pg. 2-27
pg. 2-30
pg. 2-39
Setting the Number of Averages
Measuring Power
Measuring Relative Power
Offsetting a Power Measurement
Using Power Correction
Using the Menu
2-2
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
How this Counter Works for You
How this Counter Works for You
The following is a list of some of the key things the Counter does for you.
•
•
Presets the menus to default states and values at power-up
The Counter’s Menu key and other front-panel keys allow you to select
such things as the timebase source, the GPIB address, and the RS-232
serial-port baud rate. The Counter also allows you to store your
selections in non-volatile memory; thus, these settings are not lost
when power has been off or after a remote-interface reset.
•
•
•
Automatically displays measurement(s) when you have selected a
measurement function.
Accepts your entry for a menu item when you press the Enter key.
You must press the Enter key to complete each setting and/or selection.
Saves user configuration settings.
Operating Guide
2-3
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Summary of the Measurement Sequence
Summary of the Measurement Sequence
1. Turn on the Main ~ Power switch on the back panel, and then press and
release the POWER button on the front panel.
NOTE
The internal Reference Oscillator receives power only when the
Main ~ Power switch is on. Therefore, the frequency of the reference signal
may drift until the oscillator stabilizes. Specifications for the stability of
the standard internal timebase and the optional Oven Timebase are
provided in Chapter 3.
2. Connect the input signal to the appropriate input connector (Channel 1
or Channel 2).
3. Connect an external reference signal to the External Reference
connector on the back panel (if desired).
4. Press the Chan Select key to select the input channel (if necessary).
5. Press the Display Power key if you need to measure power (Channel 2
only).
6. Press the frequency and/or power Offset On/Off keys to enable offset
measurements (if desired), and then use the Freq Offset (Shift + Rate)
and/or Pwr Offset (Shift + Avg) keys to enter the offset values.
7. Use the Resol, Rate, and Avg keys to configure the display.
8. Use the Menu (Shift + Reset/Local) key to set the reference-oscillator
source, to select the Channel 1 low-pass filter, to configure the
Counter’s response to frequency modulation, to enable and configure
Power Correction, and/or to select a previously saved set of user
settings.
9. If you intend to operate the counter remotely using the GPIB, use the
GPIB (Shift + Resol) key to configure the GPIB.
10. If you intend to operate the counter remotely using the serial
interface, use the Menu (Shift + Reset/Local) key to adjust the serial
port Baud rate.
2-4
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Selection Keys
Using the Selection Keys
There are six Selection keys—four “arrow” keys, the Enter key, and the
sign (+/–) key. The functions of the arrow keys depend on the Counter’s
operating mode (i.e., sequencing through choices in the Menu, numeric
entry, state change, etc.). This section describes how the Selection keys
function in these different operating modes.
Sequencing Through the Menu
To access the Menu, press the Shift key, and then press the Menu
(Reset/Local) key.
Menu
•
Press the up- or down-arrow key to go forward to the next menu
function or back to the previous menu function. Pressing either of these
keys repeatedly cycles through the list of menu functions.
Reset/
Local
Shift
•
Press the right-arrow key to select a function. When you do this, the
flashing annunciator ( ) changes direction and the current setting
flashes to indicate that you can now use the up- and down-arrow keys
to cycle through the available settings.
•
Press the up- or down-arrow key to move through the list of available
settings for a function. Pressing either of these keys repeatedly cycles
through the list of settings.
+/-
Enter
•
•
Press the Sign (+/–) key to change the sign of numeric values.
Press the Enter key to accept the currently displayed setting and exit
the Menu.
NOTE
In most cases, when you reach the top or bottom of a list of settings, or the
left or right end of a numerical field, the focus rolls over to the opposite
end of the list of settings, or wraps around to the opposite end of the
numeric field. In some situations, however, this does not occur, because if
it did, you could choose an illegal setting. For these settings, you have to
use the opposite button to cycle back through the values or settings.
Operating Guide
2-5
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Selection Keys
Numeric Entry
Several menu functions, and several functions that have dedicated keys
on the front panel, require you to enter numeric values.
•
•
Press the (left-arrow) and (right-arrow) keys to move left and
right to select adjustable digits (the selected digit flashes).
Press the
(up-arrow) and/or
(down-arrow) key to increment and
decrement the selected (flashing) digit of the displayed value (see note
on previous page).
+/-
Enter
•
•
Press the Sign (+/–) key to change the sign of the numeric value.
Press the Enter key to complete a numeric entry. (If you change the
value of a numeric entry, but you forget to press the Enter key, the
value of the entry is not changed.)
2-6
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Selection Keys
Changing States
Several menu functions, and several functions that have dedicated keys
on the front panel, require you to choose from a list of available states.
These functions and the states you can choose for each of them are:
•
Reference Oscillator (REF OSC)
–
–
Internal (INT)
External (EXT)
•
Serial Port Baud Rate (BAUD)
–
–
–
–
–
–
1200
2400
4800
9600
14400
19200
•
•
•
Frequency Modulation (FM)
–
–
Automatic (AUTO)
Off (OFF)
Channel 1 Low-Pass Filter (CH1 LPF)
–
–
On (ON)
Off (OFF)
Measurement Rate (Rate key)
–
–
–
–
Fast (FAST)
Medium (MED)
Slow (SLOW)
Hold (HOLD)
•
Resolution (Resol key)
1 Hz, 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz
–
Operating Guide
2-7
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Selection Keys
Use the Selection keys as described below to change the state of these
functions:
•
When the annunciator ( ) in the display flashes, press the right-arrow
key to move the focus from the displayed menu function (or front-
panel-key function) to the setting for that function.
•
Press the up- or down-arrow key to cycle through the available choices.
Press the Enter key to complete the setting. (If you change the setting of a
function, but you forget to press the Enter key, the setting of the function
is not changed.)
NOTE
The Sign key has no function and is ignored in menu selections and
front-panel functions that have state-change selections only.
2-8
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Clear and Reset/Local Keys
Using the Clear and Reset/Local Keys
The Clear key and the Reset/Local key have similar functions in the
Menu and in other front-panel-key function settings, but their effects vary
with the Counter’s state and condition. In general, the Reset/Local key
restores the setting that was in effect when you entered the Menu or
front-panel-key function, but it does not close the Menu or the
function-setting display. The Clear key also restores the previous setting,
but it closes the Menu or the front-panel-key function-setting display at
the same time.
Freq
Menu
Offset
Reset/
Local
Rate
On/Off
Clear
If you press the Reset/Local key while the Counter is taking
measurements, it resets the current operation and forces the Counter to
reacquire and re-measure the signal.
Shift
Pressing the Reset/Local key while the Counter is in Remote Mode forces
the Counter into Local Mode and enables all of the front-panel controls.
Acknowledging Messages
When a message is displayed, press the Reset/Local key, the Clear key,
or the Enter key (after reading the message) to acknowledge it and erase it
from the display.
Operating Guide
2-9
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Other Function Selection Keys
Other Function Selection Keys
There are several functions that you access directly from front-panel keys
(not from within the Menu). These functions are:
MODIFY
GPIB
•
•
•
•
Measurement Rate (Rate key)
Display Resolution (Resol key)
GPIB Address (GPIB key)
Freq
Pwr
Offset
Offset
Rate
Avg
Resol
On/Off
Clear
+/-
Enter
Use the Selection keys in the manner described earlier in this chapter
(see “Numeric Entry” and “Changing States”) to adjust the settings for
these functions. Detailed procedures for using the Rate, Avg, Resol, and
GPIB keys are provided later in this chapter.
There are also a number of functions that are toggled between states
(no selections are displayed) using named front-panel keys. These are:
MO
•
•
•
•
Display backlight on and off (
the On/Off / Clear key.
On/Off). Press Shift, and then press
Freq
Offset
Pwr
Offset
Rate
Avg
Channel selection (Chan Select). Press Chan Select to switch between
the two input channels.
On/Off
Clear
+/-
Display power measurement (Display Power). Press Display Power to
turn the power-measurement function on and off.
Frequency offset measurement (FREQ Offset On/Off). Press the Offset
On/Off key in the FREQ area of the front panel to turn the frequency
offset function on or off.
FREQ
Gate
POWER
Channel 2
dBm/ W
•
Power offset measurement (POWER Offset On/Off). Press the Offset
On/Off key in the POWER area of the front panel to turn the power
offset function on or off (the Display Power function must be on).
Chan
Select
Display
Power
Rel Freq
Rel Pwr
Offset
On/Off
Offset
On/Off
2-10
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Other Function Selection Keys
•
•
Relative frequency measurement (Rel Freq). Press Shift, and then
press the Rel Freq (Offset On/Off) key to measure the difference in
frequency between the current measurement and the measurement
taken at the time you pressed the Rel Freq key (drift).
Relative power measurement (Rel Pwr). Press Shift, and then press the
Rel Pwr (Offset On/Off) key to measure the difference in power
between the current measurement and the measurement taken at the
time you pressed the Rel Pwr key.
Operating Guide
2-11
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Measuring Frequency
Measuring Frequency
1
2
Connect the Counter to a power source, and set the
Main ~ Power switch on the back panel to 1 (on).
Main ~ Power
If the Counter is connected to an AC power source, the Main AC Power
indicator on the back panel and the Standby indicator on the front panel
light. If the Counter is connected to an external DC power source or is
operated from internal batteries (with Battery option only), the Standby
indicator lights, but the Main AC Power indicator does not.
Press the POWER button on the front panel.
The Standby indicator goes off, and all segments of the front-panel display
are temporarily activated. TESTING is displayed while the Counter
performs its power-on self-test. If the Counter passes all of the tests,
SELF TEST OK is displayed, and the Counter then displays its model
number, firmware version number, GPIB address, and CH2 NO SIGNAL.
The Counter is now ready to measure the frequency of a signal applied to
the Channel 2 input. Note that the Ch 2 and Freq annunciators are activated.
POWER
Standby
3
Connect an input signal to Channel 2.
CAUTION
The Channel 2 input path circuits contain sensitive GaAs semiconductors.
To prevent damage to these components, always adhere to standard ESD
maximum power specification for this channel (+27 dBm) is not exceeded.
The Counter automatically displays the measured frequency of the input
signal. To set the resolution, measurement rate, and/or the number of
averages, see the appropriate procedure in the section titled “Operating
the Counter,” or refer to “Setting the Resolution,” “Setting the
Measurement Rate,” and “Setting the Number of Averages,” later in this
chapter.
CHANNEL 2
50 MHz to 20 GHz
DAMAGE
+27 dBm
50 Ω
2-12
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Measuring Frequency
NOTE
When the frequency of a signal applied to the Channel 2 input exceeds the
maximum rated frequency for the instrument, the Counter displays
CH2 TOO HIGH.
4
To measure the frequency of a signal applied to the Channel 1
input, press the Chan Select key.
CHANNEL 1 is displayed momentarily, and the Ch 1 and Freq annunciators
are activated. If a signal is presently applied to the Channel 1 input, the
measured frequency is then displayed. If no signal is applied, CH1 NO
SIGNAL is displayed until an input signal is connected to the Channel 1
input connector.
FREQ
Gate
Chan
Select
Operating Guide
2-13
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Setting the Resolution and Measurement Rate
Setting the Resolution and Measurement Rate
The number of measurements the Counter makes in a given amount of
time is affected by the Rate setting, the Resolution setting, and the quality
of the input signal (signal quality affects the amount of time the Counter
requires to determine an accurate measurement). By adjusting the
Resolution and Rate settings, you can affect how often the Counter
takes measurements.
Setting the Resolution
The Counter’s resolution setting determines the number of digits displayed
for measurements and the precision of the measurements. Since less time
is required to compute each measurement as the resolution of the
measurements is reduced, the resolution setting also affects the rate at
which measurements are taken and displayed. As a result, the flash rate
of the Gate indicator changes when you change the resolution.
The numerals shown for the value of the measurement are displayed in
four groups of three digits, as shown below (the leading zero is suppressed):
GHz
MHz
kHz
Hz
Ch
2
Freq
2-14
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Setting the Resolution and Measurement Rate
Resolution Setting Example
For the following example, use the 10 MHz output from the reference
timebase as the input to Channel 1.
1
2
Press the Resol key to enter the resolution-setting mode.
GPIB
Resol
The current resolution setting is displayed (the current value and the
indicator between the arrow keys are flashing to indicate that you can use
the up- and down-arrow keys to change the setting).
Enter
Press the up-arrow or down-arrow key to decrease or increase
the resolution.
You can press these keys as many times as necessary to locate the setting
you want to use. The available resolution settings are 1 Hz (the default
setting), 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, and 1 MHz.
3
Press the Enter key to activate your setting and exit the
resolution-setting mode.
The setting you chose is now in effect. The number of digits displayed for
the measurement is adjusted accordingly; you can observe the affect on
measurement speed by monitoring the flash rate of the Gate indicator.
NOTE
The measurement resolution has a direct effect on the amount of time the
Counter requires to complete a measurement. Measurements made at the
Counter’s maximum resolution setting (1 Hz) are noticeably slower than
at lower resolutions. This is especially noticeable when the Counter is set
to average a number of measurements.
Operating Guide
2-15
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Setting the Resolution and Measurement Rate
Setting the Measurement Rate
The measurement Rate setting determines how frequently the counter
initiates measurements. Since the actual measurement rate is also
affected by the resolution setting and the signal quality, as mentioned
earlier, the available rate settings (FAST, MED, and SLOW) do not equate
to a fixed number of measurements in a given amount of time.The HOLD
setting turns off automatic measurements, so that a single measurement
is made each time you press the Reset/Local key.
Rate Setting Example
1
2
Press the Rate key to enter the rate-setting mode.
Freq
Offset
Rate
The current rate setting is displayed (the current value and the indicator
between the arrow keys are flashing to indicate that you can use the up-
and down-arrow keys to change the setting).
On/Off
Clear
Press the up-arrow or down-arrow key to decrease or increase the
measurement rate.
You can press these keys as many times as necessary to locate the setting
you want to use. The available resolution settings are FAST, MED, SLOW,
and HOLD.
3
4
Press the Enter key to activate your setting and exit the rate-
setting mode.
The setting you chose is now in effect. The measurement rate is adjusted
accordingly; you can observe the effect on measurement speed by
monitoring the flash rate of the Gate indicator. There is no annunciator
on the display for the rate setting, unless you set the rate to HOLD.
If you set the rate to HOLD, press the Reset/Local key to initiate
a measurement.
Hold
The Counter displays the MEASURING message while it computes the
measurement, and then displays the result. Press the Reset/Local key
again each time you want to take an additional measurement.
2-16
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Setting the Number of Averages
Setting the Number of Averages
You can set the Counter to take a variable number of frequency, power,
or voltage measurements and average them mathematically before
displaying the result. You can use this feature to determine the effective
measurement of a signal that is fluctuating. When measuring the
frequency of a fluctuating signal, you can also use averaging to retain
some of the precision of a maximum-resolution measurement.
The default number of averages is 1, which means that no averages are
performed, and the maximum setting is 99. Note that the tens position
(10 through 90) and the units position (0 through 9) are adjusted
separately, and that it is not possible to set the number of averages to 0.
NOTE
When a large number of averages is selected for a frequency measurement
in combination with a high resolution setting (e.g., 1 Hz), it takes a
considerable amount of time for the Counter to take the measurements,
compute the averages, and display an initial reading. For example, when
the number of averages is set to 60, and the resolution is set to 1 Hz, the
first reading is displayed after 60 seconds (approximately). Subsequent
computations do not require as much time, since the averaging function
computes a running average. However, the rate at which the display is
updated after the initial average computation is also slower than at lower
resolution settings.
Averages Setting Example
1
2
Press the Avg key to enter the averages-setting mode.
Pwr
Offset
Avg
The current averages setting is displayed (the current value and the
indicator between the arrow keys are flashing to indicate that you can use
the up- and down-arrow keys to change the setting).
+/–
Press the up-arrow or down-arrow key to decrease or increase the
value for the units position of the number of averages.
Operating Guide
2-17
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Setting the Number of Averages
NOTE
For most of the Counter’s settings, when you continue to press either the
up-arrow or the down-arrow key when you reach the end of the available
settings, the value for the setting “rolls over” to the value at the opposite
end of the range. For example, if the GPIB address is set to 31, and you
press the up-arrow key, the value changes to 1. However, when you adjust
the value in the units position for the number of measurements to be
averaged, rollover does not occur. If you press the up-arrow when the
value in the tens position is 0 and the value in the units position is 9, or if
you press the down-arrow when the value in the tens position is 0 and the
value in the units position is 1, there is no change. If the value in the units
position could roll over (in either direction), it would allow you to set a
value of 0 for the number of averages. Since at least one measurement
must be taken, 0 is an illegal value.
3
4
Press the left-arrow key once to move the focus to the tens
position, and then use the up- and/or down-arrow key to set the
value for the tens position (if desired).
Note that the tens and units values are set separately.
Press the Enter key to activate your setting and exit the averages-
setting mode.
The Avg On annunciator is activated, and the Counter displays AVERAGING
while it takes the first set of measurements. The length of time that the
AVERAGING message is displayed varies primarily with setting for the
number of averages, since this determines the number of measurements
that must be made and averaged before displaying a result. When the first
set of averages is complete and the result is displayed, the Counter
immediately takes another measurement, discards the oldest
measurement included in the current average computation, recomputes
the average and displays the new result. This continues until you change
the setting for the number of averages or disable averaging (by setting the
number of averages to 0).
Ch 12
Rel Freq
Avg On
2-18
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Setting the Number of Averages
In certain situations, the length of time that the AVERAGING message is
displayed can be affected by additional factors. When you are measuring
frequency, the current resolution setting, the rate setting, and the quality
of the signal all affect the length of time required to make the
measurements and complete the average computation.
If the measurement rate is set to HOLD, and a value larger than 1 is set
for averages, the first set of measurements is not initiated until you press
the Reset/Local key. When you do, the Counter displays the AVERAGING
message while it takes the first set of measurements. When the first set of
measurements is complete, and the averaging result is displayed, the
Counter remains in this state until you press the Reset/Local key to
initiate another set of measurements, change the value for averages back
to one, or change the setting for the measurement rate to SLOW, MED,
or HIGH. When the measurement rate is set to HOLD, the Counter performs a
block-average computation instead of a running-average computation.
Operating Guide
2-19
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Measuring Relative Frequency
Measuring Relative Frequency
You can measure the difference in frequency from one measurement to
another (frequency drift) or between two separate input signals using the
Relative Frequency function.
Relative Frequency Example
Press the Shift key, and then press the Rel Freq (FREQ Offset On/Off)
key. The Shift annunciator activates when you press the Shift key. When
you press the Rel Freq (FREQ Offset On/Off) key, the Shift annunciator
disappears, and the Rel Freq annunciator in the upper-left corner of the
display activates. At the same time, the Counter saves the frequency
measurement it was displaying at the time you pressed the Rel Freq key,
and it computes and displays the difference between that measurement
and the current measurement.
Ch
2
Rel Freq
You can also use the Relative Frequency function to measure the
difference between two different signals. To do this, activate the Relative
Frequency function, as described in the previous paragraph, disconnect
the cable supplying the signal to the input connector, and then connect the
second signal to the same input connector. The value displayed when the
Counter acquires the second signal is the frequency difference between
the two signals.
2-20
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Offsetting a Frequency Measurement
Offsetting a Frequency Measurement
You can use the Frequency Offset (Freq Offset) function to add or subtract
a constant value to/from a frequency measurement. For example, you can
use an offset to compensate for a systematic error or to display the
difference in frequency between two signals.
To display an offset frequency measurement, you need to set the value and
sign (+/–) of the offset and to turn the Frequency Offset function on. In the
following example, the Frequency Offset function is enabled first, and the
offset value is then entered. However, the order doesn’t matter, so you can
also enter the offset value first, and then turn the offset function on.
Frequency Offset Example
1
Connect a cable from the 10 MHz reference output on the back
panel to the Channel 1 input connector, and press the Chan Select
key (if necessary) to activate Channel 1.
The display should look like this:
GHz
MHz
kHz
Hz
Ch 1
Rel Freq
2
Press the Shift key, and then press the Freq Offset (Rate) key.
The Shift annunciator activates when you press the Shift key. When you
press the Freq Offset key, the Shift annunciator disappears, and the Freq
Offset annunciator at the left side of the display activates.
Operating Guide
2-21
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Offsetting a Frequency Measurement
3
4
Use the left- and right-arrow keys to move the focus to the digit(s)
in the frequency-offset display that you need to adjust to enter the
offset value, and then use the up- and down-arrow keys to adjust
the value for each digit. Enter a value of 500 Hz.
The flashing digit is the digit that currently has the focus. This means
that you can change the value of the flashing digit using the up- and
down-arrow keys.
Press the sign (+/–) key (if desired) to change the sign of the offset
value.
The display should look like this:
GHz
MHz
kHz
Hz
Ch 1
Rel Freq
Offset
5
Press the Enter key to confirm the offset value and exit the
offset-entry display.
The Freq Offset annunciator is deactivated, and the measurement
display returns.
NOTE
When you are entering a value for Frequency Offset (or Power Offset),
you can use the Reset key to restore all of the displayed digits to zero.
These are the only two functions in which the Reset key has this effect.
2-22
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Offsetting a Frequency Measurement
6
Press the Offset On/Off key.
The Freq Offset annunciator is activated, and the value of the display is
adjusted to reflect the value and sign of the offset entered in Steps 2 and 3.
The display should look like this:
GHz
MHz
kHz
Hz
Ch 1
Rel Freq
Offset
Since the offset function can be used to add or subtract a fixed value
to/from the measurement result, you can use this feature to tune or align
the odd frequencies of a local oscillator (LO). If you enter the target
frequency as a negative offset, the Counter displays the difference
between the LO’s frequency and the target frequency. You can then adjust
the LO until the Counter displays a value of zero.
NOTE
The maximum value that can be entered for Frequency Offset is
49,999,999,999 Hz.
Operating Guide
2-23
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Measuring Power
Measuring Power
The Agilent 53150A/53151A/53152A can also measure signal power
(in the same frequency ranges as for frequency measurements) on
Channel 2. The power measurement, which is shown in a dedicated area
of the display, includes a digital readout and an analog representation
that is useful when peaking signals. The display can be configured to show
power in units of dB, dBm, W, mW, µW, and percentage (%).
CAUTION
The Channel 2 input path circuits contain sensitive GaAs semiconductors.
To prevent damage to these components, always adhere to standard ESD
(ElectroStatic Discharge) prevention procedures, and ensure that the
maximum power specification for this channel (+27 dBm) is not exceeded.
Power Measurement Example
This example assumes that a signal is currently applied to the Channel 2
input connector.
1
Press the Display Power key to enable power measurement.
The Pwr annunciator at the left side of the display is activated, and the
Counter’s digital and analog power displays show the power measurement
in dB or dBm (the default units of measurement).
The display should look like this:
Ch 12
Rel Freq
dB
dBm
Watts
mW
uW
%
Rel Pwr
2-24
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Measuring Power
2
Press the Shift key, and then press the dBm/W (Display Power) key.
When you press the Shift key, the Shift annunciator is activated. When you
press the dBm/W (Display Power) key, the Shift annunciator goes off, and
the units of measurement annunciator group to the right of the digital power
measurement changes from dB or dBm to W, mW, or µW, as shown below:
Ch 12
Rel Freq
dB
dBm
Watts
mW
uW
%
Rel Pwr
NOTE
When the power of a signal applied to the Channel 2 input exceeds the
maximum rated power for the instrument, the Counter displays HI.
Operating Guide
2-25
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Measuring Relative Power
Measuring Relative Power
You can measure the difference in power from one measurement to another
or between two separate input signals using the Relative Power function.
Relative Power Example
Press the Shift key, and then press the Rel Pwr (PWR Offset On/Off) key.
The Shift annunciator activates when you press the Shift key. When you
press the Rel Pwr key, the Shift annunciator disappears, and the Rel Pwr
annunciator at the left side of the display activates. At the same time, the
Counter saves the power measurement it was displaying at the time you
pressed the Rel Pwr key, and it computes and displays the difference in
power between that measurement and the current measurement.
Ch 12
Rel Freq
Rel Pwr
NOTE
When the Counter is set to measure power in dBm, relative power is
expressed in dB. When the Counter is set to measure power in Watts, mW,
or, µW, power relative power is expressed as a percentage (%).
You can also use the Relative Power function to measure the difference in
power between two different signals. To do this, activate the Relative
Power function, as described in the previous paragraph, disconnect the
cable supplying the signal to the input connector, and then connect the
second signal to the same input connector. The value displayed when the
Counter acquires the second signal is the power difference between the
two signals.
2-26
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Offsetting a Power Measurement
Offsetting a Power Measurement
You can use the Power Offset (Pwr Offset) function to add or subtract a
constant value to/from a power measurement. For example, you can use
an offset to compensate for a systematic error, to display the difference in
power between two signals, or to compensate for losses and attenuation in
cables or components that are between the signal source and the Counter.
To display an offset power measurement, you set the value and sign (+/–)
of the offset and turn the Power Offset function on. In the following
example, the Power Offset function is enabled first, and the offset value is
then entered. However, the order doesn’t matter, so you can also enter the
offset value first, and then turn the offset function on.
Power Offset Example
1
Connect a signal to the Channel 2 input connector, and activate
power measurement by pressing the Display Power key.
The display should look like this (except for the values, which are
simulated in the illustration):
Ch 12
Rel Freq
dB
dBm
Watts
mW
uW
%
Rel Pwr
Operating Guide
2-27
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Offsetting a Power Measurement
2
Press the Shift key, and then press the Pwr Offset (Avg) key.
The Shift annunciator activates when you press the Shift key. When you
press the Pwr Offset key, the Shift annunciator and the frequency display
disappear, the Pwr Offset annunciator at the left side of the display
activates, and the power offset value is set to 00.00, as shown below:
Ch 12
Rel Freq
dB
dB
Watts
Rel Pwr
Offset
mW
uW
%
3
Use the left- and right-arrow keys to move the focus to the digit(s)
in the power-offset display that you need to adjust to enter the
offset value, and then use the up- and down-arrow keys to adjust
the value for each digit.
The flashing digit is the digit that currently has the focus. This means
that you can change the value of the flashing digit using the up- and
down-arrow keys.
NOTE
If you enter a value for Power Offset that results in a power reading that
is out of the Counter’s specified power-measurement range, the Counter
displays HI in the power display when the Power Offset function is
enabled.
4
Press the Sign (+/–) key (if desired) to change the sign of the
offset value.
Ch 12
Rel Freq
dB
dB
Watts
Rel Pwr
Offset
mW
uW
%
2-28
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Offsetting a Power Measurement
5
6
Press the Enter key to confirm the offset value and exit the offset-
entry display.
The Pwr Offset annunciator is deactivated, and the measurement display
returns.
Press the Offset On/Off key (in the POWER area of the front panel).
The Pwr Offset annunciator is activated, and the value of the display is
adjusted to reflect the value and sign of the offset entered in Steps 3 and 4.
The display should now look like this (values are simulated):
Ch 12
Rel Freq
dB
dB
Watts
Rel Pwr
Offset
mW
uW
%
NOTE
When you are entering a value for Power Offset (or Frequency Offset),
you can use the Reset key to restore all of the displayed digits to zero.
These are the only two functions in which the Reset key has this effect.
Operating Guide
2-29
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using Power Correction
Using Power Correction
The Power Correction function in the main Menu allows you to set the
Counter to automatically compensate for power loss (or gain) that occurs
in the test configuration, such as attenuation resulting from cable
impedance. You can choose from nine power-correction profiles that are
stored in nonvolatile memory, and you can modify the contents of these
profiles.
Each profile is defined by two to ten data points (a data point consists of a
loss value and a frequency value). When Power Correction is enabled, the
Counter automatically adds a correction to the power reading (determined
from the data points in the profile) that compensates for the loss (or gain)
at the frequency being measured. When a measured frequency does not
match any of the frequency values defined in the currently selected
profile, the Counter interpolates for the measured frequency to determine
the appropriate loss value to add to the power measurement.
A minimum of two valid data points is required for Power Correction; you
can enter up to ten data points in each power-correction profile. Each of
the power-correction profiles initially contains two valid data points—
0.0 dB loss at 1 GHz, and 0.0 dB loss at the highest frequency the Counter
can measure (20 GHz for the 53150A, 26.5 GHz for the 53151A, or 46 GHz
for the 53152A). The remaining eight data points contain values of 0.0 dB
loss at 0.0 GHz. When entering data, you can change the values in an
existing data point or enter new values in a data point that currently has
zero values. The data points are automatically sorted into order by
frequency as you finish entering each one.
2-30
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using Power Correction
Power Correction Theory of Operation
When the Counter interpolates between data points to determine the
amount of correction to apply to the current measurement, it computes the
correction based on a straight line plotted between the frequency values in
the two closest data points. Therefore, a graph of a power-correction
profile would show a “curve” that consists of two to nine straight-line
segments, rather than a true curve, as shown below.
P
o
w
e
r
F r e q u e n c y
NOTE
When the frequency value of a signal is beyond either end of the curve
specified by the values in the currently selected profile’s data points,
the Counter computes a correction by extending the straight line defined
in the last two data points in the profile.
As the graph above shows, the Counter never computes power-correction
values for loss above the zero axis. Conversely, corrections are never
computed for gain below the zero axis. When the Counter interpolates for
frequencies that are above or below the range of frequencies specified in
the currently selected profile, it never computes a value that would fall on
the opposite side of the zero axis from the closest specified frequency.
In other words, if there are two or more data points that contain loss
values, the Counter never computes or applies a correction that would be
indicative of gain. Conversely, if there are two or more data points that
contain gain values (negative loss values), the Counter never applies a
correction that would be indicative of loss.
Operating Guide
2-31
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using Power Correction
Since there can be no further change in the loss or gain values once the
zero axis is reached, no power corrections are applied when the input
frequency reaches or passes a point in the profile that intersects the zero
axis. Effectively, the Counter computes only loss-correction values or gain-
correction values—never both within the same profile.
When you enter values in power-correction data points and then exit the
data-point display (using either the left-arrow key or the Enter key),
the Counter immediately sorts all of the data-points into order by the
frequency values. Therefore, if you enter a pair of values in a data point,
exit the data-point display, and then immediately return to the display for
that data point, you may see different values than the ones you just entered.
The values you entered may now be contained in a differently numbered
data point in the same profile, if they were previously entered out of order
by frequency.
Increasing Profile Accuracy
To increase the accuracy of a power-correction profile, you can add data
points between the existing data points in the profile (if less than 10 data
points are in use), thus bringing the data points closer together and
shortening the straight-line segments. If all ten data points are in use,
you can add data points by using two or more profiles for a single test
configuration. If you do this, you must select the profile you need (from the
Menu) for the range of frequencies being measured. This means that you
must select a different profile whenever the measured frequency moves
outside the range of frequencies defined by the data points in the
currently selected profile.
Power Correction Examples
The procedures for using Power Correction and entering loss (or gain) and
frequency values in power-correction profiles are demonstrated in the
Power Correction examples on the following pages. The first example,
on page 2-33, shows how to select a power-correction profile and enable
Power Correction and also shows how to disable Power Correction.
The second example, on page page 2-35, shows how to enter data in the
power-correction profiles.
2-32
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using Power Correction
Power Correction Example: Selecting a Correction Profile
1
2
Press the Shift key, and then press the Menu (Reset/Local) key.
Press either the up- or down-arrow key repeatedly until “PWR
CORR > OFF” is displayed as shown below:
3
4
Press the right-arrow key once.
The flashing pointer in the Power Correction display changes direction
to indicate that you can now use the up- and down-arrow keys to select a
power-correction profile (or select OFF to disable Power Correction).
The current setting for Power Correction (OFF or a number between 1
and 9) also flashes.
Press the up- and/or down-arrow key repeatedly until the number
of the power-correction profile you want to use is displayed.
For this example, choose profile number 3.
If no data points were entered into the correction profiles previously,
each of the nine power-correction profiles contains only two valid data
points—0.0 dB loss at 1 GHz and 0.0 dB loss at the highest frequency the
Counter can measure (20 GHz for the 53150A, 26.5 GHz for the 53151A,
or 46 GHz for the 53152A). The remaining eight data points in each of the
profiles initially contain values of 0.0 dB loss at 0.0 GHz. (This example
assumes that valid loss and frequency values were previously entered in
two or more of the data points in this profile.)
Operating Guide
2-33
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using Power Correction
5
Press the Enter key to select profile number 3.
Power Correction is enabled using profile number 3, and the measurement
display returns. The power reading now includes an adjustment for the
loss incurred at the measured frequency. The amount of the adjustment is
derived from the loss and frequency values in the data points in the
selected profile. A lower-case letter “c” is shown in the hundredths
position of the power-measurement display to indicate that Power
Correction is enabled.
Ch
2
Freq
dBm
Pwr
NOTE
Pressing the Enter key when the number of a power-correction profile
(1-9) is displayed selects that profile, enables Power Correction, and exits
the Menu. If you intend to enter data in the currently displayed profile,
press the right-arrow key instead of the Enter key to select the
power-correction profile without exiting the Menu.
You can also select a power-correction profile by pressing the right- or
left-arrow key (instead of the Enter key). When you press either arrow
key, you do not exit the Menu. As the next example shows, you should
select a profile with the right-arrow key when you intend to enter or
change the loss and/or frequency values in the selected profile. You should
select the power-correction profile with the left-arrow key if you are done
working with the power-correction settings, but you want to change
settings for other functions in the Menu.
2-34
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using Power Correction
Power Correction Example: Editing Data Point Values
1
Select a power-correction profile using the up- and/or
down-arrow keys (as shown in steps 1 through 4 in the previous
example). For this example, choose profile number 3.
2
Press the right-arrow key.
The display changes to show the loss and frequency values stored in the
data point that contains the lowest frequency value in the current profile.
The left and right pointers that are before and after the word “LOSS” are
flashing.
dB
The ten small, single-line annunciators that are below the analog power
display are used to indicate which of the ten data points is currently
displayed. In the example shown above, only the first annunciator is
activated, which indicates that the values displayed are for data point 1,
the lowest data point.
Operating Guide
2-35
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using Power Correction
3
To insert values in an empty data point, press the up- and/or
down-arrow key repeatedly to cycle through the data points in
the selected profile to locate one that contains values of 0.0 for
both loss and frequency.
For a profile that has not been previously used, the first two data points
displayed contain values of 00.0 dB loss at 1.0 GHz and 00.0 dB loss at the
highest frequency the Counter can measure (20 GHz for the 53150A,
26.5 GHz for the 53151A, or 46 GHz for the 53152A). The remaining data
points contain values of 00.0 dB loss at 00.0 GHz. In profiles that have
been previously used, all data points containing non-zero values are
displayed in order from lowest to highest, and any zero-value data points
are displayed above the non-zero data points. All data points are
automatically sorted into order by frequency and saved whenever you
select a different profile or exit the Power Correction menu.
4
To change a value (or values) in a data point, press the up- and/or
down-arrow key repeatedly until the data point that contains the
value(s) you want to change is displayed, and then press the
right-arrow key (the number of the data point displayed is
indicated by the number of annunciators to the right of the
loss value).
The pointer to the left of the word “LOSS” stops flashing, the pointer to
the right of the word “LOSS” changes direction and flashes, and the first
digit of the frequency value flashes. This indicates that you can now
adjust the value of the first digit in the frequency setting.
dB
5
To adjust the value of the tens position of the frequency setting,
press the up- or down-arrow key until the desired value is
displayed.
2-36
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using Power Correction
6
Use the right-arrow key to move to each of the remaining digits in
the frequency setting, and use up- and down-arrow keys to adjust
their values, if necessary.
The currently selected digit flashes to indicate that it is the one that
changes when you press the up- and down-arrow keys. You can also use
the left-arrow key to back up to a previous digit, if necessary. However,
be aware that the digit to the left of the one you are adjusting increments
automatically to the next higher or lower value when the value of the
currently selected digit exceeds nine or is incremented below zero.
7
8
To adjust the loss value, press the right-arrow key while the digit
in the tenths position of the frequency value and the pointer to
the right of “GZ” are flashing.
The pointer at the right end of the display changes direction, and the first
digit (tens position) of the loss value flashes. You can now adjust its value
using the up- and down-arrow keys.
Use the left- and right-arrow keys to navigate to the remaining
digits in the loss setting, and adjust their values (if necessary)
with the up- and down-arrow keys.
dB
9
Press the Sign (+/–) key to change the sign of the loss value
(if necessary).
dB
Operating Guide
2-37
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using Power Correction
10 To add or adjust the values in another data point, press the
left-arrow key repeatedly until “PWR CORR” is re-displayed, and
repeat steps 2 through 10. To edit data points within another
power-correction profile, press the left-arrow key repeatedly until
“PWR CORR” is re-displayed, and repeat steps 1 through 10.
NOTE
When a data point is entered in a profile, all of the data points in that
profile are sorted by frequency and stored in that order. Therefore,
the data points in a profile are always in order from the lowest frequency
to the highest when you access a correction profile. The first data point
displayed is always the data point that contains the lowest frequency value.
11 If you are done entering data-point values, press the Enter key to
accept your changes, save the data-point values, and return to the
measurement display.
Power Correction is now enabled using the profile number 3.
Ch
2
Freq
dBm
Pwr
NOTE
You can include your selection of a power-correction profile in any of the
nine sets of user settings stored in non-volatile memory (see page 2-46) by
enabling the profile and then saving the set. If you save set 0 (zero) while
Power-Correction is enabled, the currently-selected profile will be in effect
whenever you turn on the Counter.
The data in the saved user settings and in all of the power-correction
profiles is stored in non-volatile memory. If the Counter ever requires
repair, and the main circuit-board assembly is replaced, these stored
values will be lost. Therefore, to protect these values and ensure they are
available for future use, you should keep an external record of them.
2-38
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Menu
Using the Menu
The Agilent 53150A/151A/152A Counter’s Menu makes it easy to control
a number of the Counter’s features and functions. You use the Selection
(arrow) keys to navigate to the setting you want to change and then to
actually make the changes.
1
Press the Shift key and then the Menu (Reset/Local) key to display the Menu.
When you press the Shift key, the Shift annunciator (near the bottom-right
corner of the display) activates. When you press the Menu (Reset/Local)
key, the Shift annunciator goes off, and the first menu item is displayed.
If you have not previously invoked the Menu since you last turned the
Counter on, the first menu item is REF OSC, the Reference Oscillator.
2
Press the right-arrow key to change the setting for the Reference
Oscillator.
The flashing annunciator ( ) in the display reverses direction to indicate
that you can now change the setting by pressing either the up-arrow key
or the down-arrow key. In the case of the Reference Oscillator function,
which has only two possible settings (INTernal and EXTernal), pressing
either the up- arrow or the down-arrow has the same effect (it toggles the
setting from INT to EXT or from EXT to INT).
NOTE
The Counter will not switch to EXTernal unless a suitable reference
signal is available at the External Reference connector.
Operating Guide
2-39
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Menu
3
Press the Enter key to activate the setting and exit the Menu.
The setting you chose is put into effect, and the Menu closes.
If you need to exit the Menu without changing any of the settings, press
the Clear key. To restore the setting of any menu item to the setting that
was in effect when you opened the Menu, press the Reset/Local key (this
restores the original setting for the current menu item but does not close
the Menu).
The Menu contains the following items (these items are displayed in the
order they are listed if you repeatedly press the up-arrow key after
opening the Menu):
•
REF OSC — Sets the Counter to use the internal timebase or an external
timebase connected to the Reference connector on the back panel.
•
•
DO SELF TEST — Starts the sequence of built-in tests.
BATT VOLTAGE — Displays the current voltage level in the
rechargeable battery packs (only if the Battery option is installed).
•
•
•
OP HRS — Displays the total number of hours the Counter has been in
operation since it was last calibrated.
Model number, firmware version number, serial number, OPTNS
(installed options).
PRESET — Resets all user-settable functions to the factory default
settings.
•
•
BAUD — Sets the data rate for the RS-232 serial port.
FM — Turns the Counter’s ability to compensate for frequency
modulation on (AUTO) or OFF.
•
•
CH1 LPF — Turns the Channel 1 Low-Pass Filter (approx. 50 KHz) ON
or OFF.
RECALL — Reads and implements a stored set of user settings from
one of nine (0 – 9) that are stored in non-volatile memory.
2-40
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Menu
•
•
SAVE — Saves a copy of the current user settings in non-volatile
memory. Nine sets (0 – 8) can be saved, and set 0 is automatically read
on startup. To have the Counter automatically start up with your
preferred settings, save these settings in set 0.
PWR CORR — Activates (or deactivates) the Power Correction function
and allows you to edit and select power-correction profiles. Power
Correction is used to compensate for losses in the test configuration,
such as attenuation resulting from cable impedance.
Each of these menu items is described in more detail on the following pages.
Navigating in the Menu and Changing Settings
When you select the Menu (with the Shift and Menu [Reset/Local] keys),
the indicator between the arrow keys flashes to indicate that the arrow
keys are now active. Since the Reference Oscillator setting is the first one
displayed when you invoke the Menu (unless you’ve used the Menu to
change another setting since you turned the Counter on), you don’t have to
use the up-arrow key or the down-arrow key to get to it.
When you press the right-arrow key, the flashing annunciator ( ) changes
direction, and the current setting for the Reference Oscillator INT
(internal) or EXT (external) flashes. This indicates that you can now
change this setting. Use either the up-arrow key or the down-arrow key to
change the setting.
If there are more than two settings available for the currently selected
function, you can cycle through the available settings by repeatedly
pressing either the up-arrow key or the down-arrow key. For example, to
change the setting for the Baud rate for the serial port, invoke the Menu,
and then repeatedly press the up-arrow or down-arrow key until BAUD is
shown on the display. Then, press the right-arrow key to select the BAUD
option, and press the up- or down-arrow repeatedly until the setting you
want is displayed. Finally, press the Enter key to implement your choice.
You navigate to and adjust the remaining settings available in the Menu
in the same manner. Each time you modify a setting and press the Enter
key, the Menu closes, so you have to reinvoke it each time to change
additional settings.
Operating Guide
2-41
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Menu
only (no settings are required [or possible] for these), such as Battery
Voltage, Operation Hours, and information that identifies the Counter
(Agilent model number, firmware version number, serial number, and
installed option codes). These menu options are described in the
remainder of this chapter and also in “The Front Panel Menus at a
Glance” on page 1-4.
NOTE
Always terminate each setting you change in a menu option by pressing
the Enter key. You can abort any change while the Menu is displayed by
pressing the Reset/Local key or the Clear key. Both keys nullify the change
you made to the current menu option, but they do not affect any of the
other menu options. The Clear key terminates the current menu session,
but the Reset/Local key does not.
Reference Oscillator (REF OSC)
By default, the Counter uses its internal 10 MHz reference oscillator
(or the optional Oven Timebase, Option 001) as a timebase for all
measurements, unless REF OSC is set to EXT, and it detects a 1, 2, 5, or
10 MHz reference signal on the Reference connector on the back panel.
If an external reference signal is present, you can force the Counter to use
the internal reference oscillator by setting the REF OSC menu option
to INT.
The available settings are EXT (external) and INT (internal), and the
default setting is INT.
NOTE
When REF OSC is set to internal (INT), the Counter outputs a 10 MHz,
1 V p-p signal on the Reference connector on the back panel.
2-42
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Menu
Do Self Test
The Counter automatically performs a series of tests on critical
you want to repeat these tests, you can do so by invoking the Menu,
navigating to DO SELF TEST, and pressing the Enter key.
The individual tests that comprise the Self Test, and the error messages
that are displayed if problems are detected, are described in Appendix B,
“Messages.”
Battery Voltage (BATT VOLTAGE)
is displayed in digital and analog form in this menu item, so you can
estimate the remaining time that the Counter can operate from the
batteries. The batteries are fully charged when the voltage reading is
13.5 V, and the minimum battery voltage for proper operation is
approximately 10 V. For additional information on the Battery Option,
see Appendix C.
Operating Hours (OP HOURS)
This is an informational menu item that displays the total number of hours
the Counter has been in operation since its last calibration. This value does
not include Standby hours. This information is useful for scheduling
routine maintenance and calibration. For additional information on
maintenance and calibration, see the Agilent 53150A/151A/152A
Assembly-Level Service Guide.
Model Number, Firmware Version, Serial Number, and
Option Codes
This menu item displays a series of numbers and codes that are used to
identify the Counter, its software version number, and the options that
are installed. These items are displayed sequentially, and you use the left-
and right-arrow keys to move between the information fields. Note that
there are several numbers displayed in the field that contains the
firmware version. These are in the following pattern:
Operating Guide
2-43
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Menu
VVV is the version number of the Counter’s firmware, and XX, YYY, and
ZZZZ are other numerical codes that are reserved for Agilent internal use.
The flashing annunciators at either end of the first line of the display
indicate that you can use the equivalent arrow key to scroll left and/or
right to the next field of information.
The option-code display lists the code number for each of the installed
options. For example, in a Counter that has the Battery and Oven
Timebase options installed, the display would show: <OPTNS 1-2- - ->.
2-44
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Menu
Preset
When PRESET is displayed, pressing the Enter key loads the default
settings for most of the Counter’s functions. These functions and their
default settings are listed in the following table:
Table 2-1. Factory Default Function Settings
Function
Available Settings
Default Setting
Reference Oscillator
(REF OSC)
INT (Internal)
EXT (External)
INT (Internal)
Frequency Modulation (FM) AUTO, OFF
AUTO
OFF
Channel 1 Low-Pass Filter
(CH1 LPF)
OFF, ON
Recall Settings (RECALL)
Save Settings (SAVE)
0 through 8
0 through 8
0
0
Measurement Rate
FAST, MED,
FAST
(Rate key)
SLOW, HOLD
Averages (Avg key)
01 through 99
01
Resolution
(Resol key)
1 Hz, 10 Hz, 100 Hz; 1KHz,
10 KHz, 100 KHz, 1 MHz
1 Hz
Display Backlight On/Off
On, Off
On
(
On/Off key)
Channel Selection
(Chan Select key)
Channel 1, Channel 2
Channel 2
dBm
Power Measurement Units
dBm (dBm, dB)
(dBm/W key)
W (W, mW, µW)
Frequency Offset
Off, On
Off
(FREQ Offset On/Off key)
(freq. limits depend on model) (0)
Relative Frequency
(Rel Freq key)
Off, On
Off, On
Off
Off
Power Offset
(POWER Offset On/Offkey) (-99.99 through +99.99 dBm) (0)
Relative Power
Off, On
Off
(Rel Pwr key)
Operating Guide
2-45
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 2 Operating Your Frequency Counter
Using the Menu
RS-232 Serial Port Data Rate (BAUD)
The Baud rate for the RS-232 serial port is configurable at 2400, 4800,
9600, 14,400, and 19,200 bps. The default setting is 9600 bps.
Frequency Modulation (FM)
The Counter can measure signals that are modulated in frequency, such as
a microwave radio carrier. When FM is set to AUTO (the default setting),
the Counter automatically detects FM signals and modifies its
measurement algorithm accordingly. Since this increases the time it takes
to compute each measurement, you can turn this feature OFF to increase
measurement speed, or leave it set to AUTO to increase accuracy when
measuring FM signals.
Channel 1 Low-Pass Filter (CH1 LPF)
The Counter has a built-in 50 KHz low-pass filter that can be enabled
from the Menu to eliminate measurement distortions that result from
noise in low-frequency signals. When the low-pass filter is enabled,
signals above 50 KHz cannot be measured on Channel 1.
Recall User Settings (RECALL)
Up to nine sets of settings you make for the Counter’s configurable
functions can be saved in non-volatile memory. The RECALL menu option
allows you to select and implement any of the sets you have previously
saved. The settings in set zero are automatically loaded on power-up.
The Save and Recall functions enable faster and easier operation, reduce
operator errors, and reduce training requirements.
Save User Settings (SAVE)
The SAVE menu option allows you to save the Counter’s current settings
for configurable functions in non-volatile memory for use at a later time.
Nine sets of settings can be saved. The Save and Recall functions enable
faster and easier operation, reduce operator errors, and reduce training
requirements.
Power Correction (PWR CORR)
Used to compensate for losses in the test configuration. See page 2-30.
2-46
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 3 Specifications
Measurement Specifications and Characteristics
All measurement specifications are over the full signal and temperature
ranges unless otherwise noted.
Input Characteristics
Agilent 53150A
Agilent 53151A
Agilent 53152A
Frequency Range
Channel 1 (Normal mode)
10 Hz–125 MHz
10 Hz–50 kHz
50 MHz–20 GHz
10 Hz–125 MHz
10 Hz–50 kHz
50 MHz–26.5 GHz
10 Hz–125 MHz
10 Hz–50 kHz
50 MHz–46 GHz
(Low pass filter enabled)
Channel 2
Sensitivity
Channel 1
10–30 Hz
30 Hz–125 MHz
Channel 2
40 mV rms
25 mV rms
40 mV rms
25 mV rms
40 mV rms
25 mV rms
−20 dBm
−33 dBm
−33 dBm
−29 dBm
N/A
−20 dBm
−33 dBm
−33 dBm
−29 dBm
−25 dBm
N/A
−20 dBm
−33 dBm
−30 dBm
−27 dBm
−27 dBm
−23 dBm
−17 dBm
50–300 MHz
0.3–12.4 GHz
12.4–18 GHz
18–20 GHz
20–26.5 GHz
26.5–40 GHz
40–46 GHz
N/A
N/A
N/A
Maximum Input
Channel 1
Channel 2
2 V
rms
2 V
rms
2 V
rms
+5 dBm
+13 dBm
+5 dBm
+13 dBm
+5 dBm
+13 dBm
50 MHz–2 GHz
2–46 GHz
Damage Level
Channel 1
120 V (dc + ac pk) linearly derated
to 5 V at 125 MHz
120 V (dc + ac pk) linearly derated 120 V (dc + ac pk) linearly derated to
to 5 V at 125 MHz
rms
+27 dBm
5 V at 125 MHz
rms
+27 dBm
rms
+27 dBm
Channel 2
Impedance (Nominal)
Channel 1
Channel 2
1 MΩ/ 60 pF
50 Ω
1 MΩ/ 60 pF
50 Ω
1 MΩ/ 60 pf
50 Ω
Connector
Channel 1
Channel 2
BNC female
SMA/APC-3.5
compatible female
BNC female
SMA/APC-3.5
compatible female
BNC female
2.92 mm removable,
SMA/APC-3.5 compatible female
SWR - Channel 2
50–300 MHz
0.25–10 GHz
10–20 GHz
1.5:1 typical
2.0:1 typical
3.0:1 typical
N/A
1.5:1 typical
2.0:1 typical
3.0:1 typical
3.0:1 typical
N/A
1.5:1 typical
2.0:1 typical
3.0:1 typical
2.5:1 typical
2.5:1 typical
20–26.5 GHz
26.5–46 GHz
N/A
Coupling
Channel 1
Channel 2
ac
ac
ac
ac
ac
ac
Acquisition Time (1 MHz FM rate)
Channel 1
Channel 2 (FM Auto/FM Off)
N/A
125 ms/100 ms
N/A
125 ms/100 ms
N/A
140 ms/115 ms
Resolution Selection
Channel 1/Channel 2
1 Hz to 1 MHz
1 Hz to 1 MHz
1 Hz to 1 MHz
Coupling
Channel 1
Channel 2
ac
ac
ac
ac
ac
ac
Operating Guide
3-3
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 3 Specifications
Input Characteristics
Agilent 53150A
Agilent 53151A
Agilent 53152A
Emissions (“kickback noise”)
Channel 1
Channel 2 (measuring/no input)
N/A
−40 dBm/<−70 dBm
N/A
−40 dBm/<−70 dBm
N/A
−40 dBm/<−70 dBm
Residual Stability*
Channel 1
Channel 2
N/A
0.6 LSD rms
N/A
0.8 LSD rms
N/A
1.25 LSD rms
*Counter and source tied to same timebase
Accuracy
Channel 1/Channel 2
1 LSD residual stability
timebase error x frequency
1 LSD residual stability
timebase error x frequency
1 LSD residual stability
timebase error x frequency
Measurement Time
Channel 1
1/Resolution + 20 ms
1/Resolution + 20 ms
1/Resolution + 20 ms
1/Resolution +
Acquisition time + 20 ms
1/Resolution +
Acquisition time + 20 ms
1/Resolution +
Acquisition time + 20 ms
Channel 2
FM Tolerance
Channel 1
Channel 2 (FM Auto)
N/A
20 MHz p-p max
@ 10 MHz rate
N/A
20 MHz p-p max
@ 10 MHz rate
N/A
20 MHz p-p max to 26.5 GHz,
12 MHz p-p max above
26.5 GHz @ 10 MHz rate
1 MHz p-p @ 10 MHz rate
1 MHz p-p @ 10 MHz rate
1 MHz p-p @ 10 MHz rate
(FM Off)
AM Tolerance
Channel 1, Channel 2
Any index provided minimum
signal level is not less
than sensitivity
Any index provided minimum
signal level is not less
than sensitivity
Any index provided minimum
signal level is not less
than sensitivity
Amplitude Discrimination
Channel 1
Channel 2
N/A
N/A
N/A
N/A
N/A
N/A
below 300 MHz
above 300 MHz
Automatically measures the largest Automatically measures the largest Automatically measures the largest
signal present provided signal is
>10 dB (typical) above any signal
separated by less than 75 MHz;
>20 dB (typical) above any signal
separated by more than 75 MHz
signal present provided signal is
>10 dB (typical) above any signal
separated by less than 75 MHz;
>20 dB (typical) above any signal
separated by more than 75 MHz
signal present provided signal is
>10 dB (typical) above any signal
separated by less than 75 MHz;
>20 dB (typical) above any signal
separated by more than 75 MHz
Power Measurement
Channel 1
Channel 2
N/A
N/A
N/A
Range
Counter sensitivity to +7 dBm
Counter sensitivity to +7 dBm
Counter sensitivity to +7 dBm
Accuracy at input connector**
(0 dBm to −20 dBm)
0.05–12.4 GHz
12.4–20 GHz
20–26.5 GHz
26.5–46 GHz
1.5 dB
1.5 dB
N/A
1.5 dB
1.5 dB
2.0 dB
1.0 dB
1.5 dB
1.5 dB
2.0 dB
N/A
0.01 dB
dBm or milliwatts/microwatts
N/A
0.01 dB
dBm or milliwatts/microwatts
Resolution
Display
**see graphs for typical data
0.01 dB
dBm or milliwatts/microwatts
3-4
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 3 Specifications
Typical* power measurement uncertainty at 25°C for various
input levels
Graph 1.
−10 dBm input
level at 25°C.
Graph 2.
0 dBm and
−20 dBm input
* Typical means approximately 2/3 of all units will meet these characteristics.
Operating Guide
3-5
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 3 Specifications
Typical* power measurement uncertainty at −25 dBm
input level
Graph 3.
−25 dBm input
level at 25°C.
Graph 4.
−25 dBm input
level from
* Typical means approximately 2/3 of all units will meet these characteristics.
3-6
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 3 Specifications
Power Supply
Timebase
ac: 90–132 Vac; 47.5–66 Hz or 360–440 Hz
216–264 Vac; 47.5–66 Hz
line selection: automatic
power requirements: 75 VA max. (25 W typ.)
dc: (Option 002 only): 11–18 Vdc; 2A max.
Battery (Option 002):
Type: VHS camcorder, lead acid (2 each)
Charge Time: 8 hours in unit
Frequency: 10 MHz
Output: 10 MHz sine wave, 1 Vrms into 50 Ω
External Timebase Input: 1, 2, 5, 10 MHz;
1 to 5 Vrms into 50 Ω
Connector: BNC female located on rear panel
Internal Timebase Stability
TCXO
(Standard)
Oven
(Option 001)
Capacity: 2.5 hours min. at 25°C
Math Functions:
Aging Rate
Per Day
Per Month
−10
—
<1 x10
<5 x 10
<1.5 x 10
−7
−8
Offset: Last reading and/or entered offset to
reading for either power or frequency
Averaging: 1 to 99 measurement running
average
Cable Loss Compensation: Offsets power
reading via linear interpolation of user-entered
attenuations with up to 9 independent frequency
points.
Short Term
(1 sec. avg. time)
−9
−10
<1 x 10
<2 x 10
Line Variation
( 10%)
−7
−10
<1 x 10
<1 x 10
−8
—
<1 x10
within 5 min. after
turn-on at 25°C
Warm-up
Temperature
Stability (0–55°C)
−6
−8
<1 x 10
<1 x 10
Display: Backlit LCD. Backlight can be turned on
or off via front panel control.
Sleep Mode (Option 002 only): Automatically
activated if no input is present for 5 minutes.
Safety: Designed in compliance with IEC-1010,
CAN/CSA 1010.1
General Information
Save and Recall: Up to 9 complete instrument
setups may be saved and later recalled. These
setups are retained when power is removed.
Sample Rate: User-selectable Fast (nominally
20 ms between readings), Medium (nominally
250 ms between readings), Slow (nominally 1 s
between readings) and Hold.
Self Test: Internal memory and count circuitry
automatically tested at startup, via menu
selection, or remotely. Error messages displayed
to indicate failed tests.
EMC: Designed in compliance with IEC-11,
EN50082-1, IEC801-2, -3, -4
Accessories Supplied
Operating, programming, and service manuals
and ac power cord.
Accessories Available
Size: 213 mm W x 88.5 mm H x 300 mm D
Operating temperature: 0–55°C
With battery option: 0–40°C
Spare Battery
53150-80010
dc Power Input Cable 53150-60214
Weight: 4 kg without battery option, 6.4 kg with
battery option
Warranty: 1 year
Options
Opt 001 Oven Timebase
Opt 002 Battery and dc input
Opt 1BP Mil-Std-45662A Calibration with data
Opt W30 Three Years of Return Repair Service
Opt W50 Five Years of Return Repair Service
Opt 1CM Rack Mount Kit
Programming: GPIB (IEEE-488.1-1987,
IEEE 488.2-1987) or RS-232C
Language: SCPI-1992.0 (Standard Commands
for Programmable Instruments)
RS-232C Rates: User-selectable 2400 to
19200 baud
Operating Guide
3-7
Download from Www.Somanuals.com. All Manuals Search And Download.
Chapter 3 Specifications
3-8
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix A Rack Mounting the Counter
Rack Mounting the Counter
Rack Mounting the Counter
You can mount the Counter in a standard 19-inch cabinet using one of two
optional kits available from Agilent:
•
Option 1CM Rack Mount Kit (Agilent 53150-67001 Rack Adapter Kit)
for single instrument (Half Module) rack mounting. Instructions and
mounting hardware are included with the rack-mounting kit.
•
Agilent 5061-9694 Lock Link Kit for two-instrument, side-by-side rack
mounting. Instructions and mounting hardware are included with the
rack-mounting kit. (Two Option 1CM Rack Mount Kits are also
required when mounting two instruments.)
To rack-mount the Counter, you must first remove the front and rear
rubber bumpers, the carrying handle, and the handle pivots:
NOTE
Unlike the hardware used elsewhere in this instrument, all hardware
used to attach the rack mounts and the handle pivots is metric.
1
Rotate the handle to its vertical position, pull the ends outward, and set
it aside.
2
To remove the rubber bumpers, lift the center of the top of the bumper
upward, stretch a corner of the bumper diagonally, then slide it off the end
of the Counter.
A-2
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix A Rack Mounting the Counter
Rack Mounting the Counter
OPTIONS
3
To rack-mount the Counter by itself, perform the steps shown in the
following illustration. (Refer to the instructions that are provided with the
Rack Adapter Kit for details.)
4
3
2
1
2
1 Rack Flange
2 Handle Pivot
3 Agilent 53150A/151A/152A Counter
4 Panel Filler (Adapter) Assembly
Operating Guide
A-3
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix A Rack Mounting the Counter
Rack Mounting the Counter
4
To rack-mount the Counter with another instrument side-by-side, obtain
the 5061-9694 Lock Link Kit. (Refer to the instructions that are provided
with the Lock Link Kit for details.)
2
5
1
4
3
2
3
1 Lock Links
2 Rack Flange
3 Handle Pivot
4 Agilent 53150A/151A/152A Counter
5 Second Agilent 53150A/151A/152A
Counter or other half-rack-size instrument
A-4
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix B Messages
Overview
Overview
The Agilent 53150A/151A/152A provides two types of messages that are
displayed on the Counter’s front panel and/or sent over the RS-232 serial
interface. The first type is status messages, which are displayed during
normal operation. The second type is error messages, which are sent via
RS-232 and/or displayed when the Counter detects an error during the
Self-Test procedure or during normal operation.
NOTE
All messages sent over the RS-232 interface are also available via GPIB.
However, these messages are not automatically sent over the GPIB
interface. For information on retrieving messages over the GPIB interface,
Status Messages
Table 3-1 lists and describes the status messages that are displayed on
the Counter’s front panel.
Table 3-1. Status Messages
Message
Description
TESTING
The Counter is performing its Self-Test.
No critical errors were detected during the self-test.
The Counter is sampling the signal and computing a measurement.
SELF TEST OK
MEASURING
AVERAGING
The Counter is taking measurements and computing the number of
averages determined by the Averages setting.
CH 1 NO SIGNAL The Counter is operational, but no signal can be detected on the
CH 2 NO SIGNAL selected input channel.
CHANNEL 1
CHANNEL 2
Identifies the currently selected channel after you press the Chan
Select key to switch channels. CHANNEL 1 or CHANNEL 2 is
displayed until the Counter can display a measurement or determine
that no signal is present.
B-2
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix B Messages
Self-Test Messages
Self-Test Messages
Table 3-2 lists and describes messages that are generated by the Counter
during Self-Test to indicate whether a component passed or failed its test.
These messages are sent via the RS-232 serial output only—they do not
appear on the Counter’s front-panel display.
Table 3-2. Self-Test Messages
Message
Description
ROM TEST FAIL
ROM TEST OK
ROM failed read test.
ROM passed read test.
RAM DATA LINES OK
RAM DATA ERROR
RAM ADDR LINES OK
RAM ADDR ERROR
RAM TEST OK
RAM data lines passed test.
RAM data lines failed test.
RAM address lines passed test.
RAM address lines failed test.
RAM tests completed with no errors detected.
EEPROM FAIL - CONFIGURATION
DATA
The configuration data saved in EEPROM
memory is defective.
ROM FAIL; Computed checkbyte does The checksum of the ROM data does not match
not match the value stored in
EEPROM.
the value stored in EEPROM.
EEPROM FAIL - CONFIGURATION
DATA; Needs to be (re)initialized.
The EEPROM org code does not verify with
current revision of ROM code.
EEPROM FAIL - POWER CAL DATA;
Using default data
The checksum of the EEPROM power-
calibration table is bad. Factory default
calibration data will be used.
EEPROM FAIL - SAVED SETTINGS;
Using default data
The checksum of the user settings stored in
EEPROM is bad. Factory default settings will be
used.
EEPROM FAIL - SAVED SETTINGS;
Invalid EEPROM SAV n Data.
The checksum of one set of user settings (1 – 9)
stored in EEPROM is bad.
GPIB FAIL; Conf. Test
The GP-IB hardware failed its confidence test.
Operating Guide
B-3
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix B Messages
Error Messages
Error Messages
Table 3-3 lists and describes messages that are generated by the Counter
during Self-Test or during operation to indicate that a problem has been
detected. These messages are displayed on the Counter’s front-panel
display and are also sent via the RS-232 serial output (note that, in many
cases, the exact message text that is displayed on the front panel is a
condensed form of the message that is sent via RS-232).
Table 3-3. Error Messages
Message
Display RS-232 Description
12V FAIL
X
X
X
X
X
X
X
The +12 VDC output from the power
supply is not within specifications.
–12V FAIL
–5V FAIL
The –12 VDC output from the power
supply is not within specifications.
The –5 VDC output from the power
supply is not within specifications.
ADC FAIL
X
X
A failure was detected in the ADC.
B1 SIGNAL PATH FAIL
PATH FAIL
A failure was detected in the Channel 1
signal path.
X
X
X
B1 THRESHOLD FAIL
THRS FAIL
X
X
X
A failure was detected in the Channel 1
threshold circuit.
B2 RF THRESHOLD FAIL
THRS FAIL
A failure was detected in the Channel 2
RF threshold circuit.
B2 THROUGH-PATH
THRESHOLD FAIL
A failure was detected in the Channel 2
through-path threshold circuit.
THRS THRU
X
B2 HETERODYNE PATH
THRESHOLD FAIL
X
X
A failure was detected in the Channel 2
heterodyne-path threshold circuit.
THRS HET
X
X
EEPROM FAIL - WRITE
EEP WRT FAIL
A failure was detected while writing to
EEPROM.
B-4
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix B Messages
Error Messages
Table B-3. Error Messages (continued)
Message
Display RS-232 Description
FRONT PANEL FAIL
FPANEL FAIL
X
The front panel or its interconnecting
cable are defective or not properly
connected.
X
X
FPGA FAIL
GPIB FAIL
X
X
X
A failure was detected in the FPGA
(Field Programmable Gate Array).
X
A failure was detected in the GPIB
hardware.
HETERODYNE PATH
FAIL
A failure was detected in the
heterodyne-path circuit.
HET PATH FAIL
IIC FAIL
X
X
X
X
X
An attempt to write to the LCD display
failed.
INSTCFG FAIL
X
The instrument’s configuration data is
missing or has become corrupted.
OVER TEMPERATURE
OVERTEMP
The Counter’s internal temperature is
above the acceptable limit.
X
X
PWR CAL FAIL
X
X
The instrument’s power-calibration data
is missing or has become corrupted.
POWER METER FAIL
PWR CKT FAIL
RAM FAIL
A failure was detected in the Channel 2
power-measurement circuit.
X
X
X
X
X
X
X
A failure was detected in RAM.
A failure was detected in ROM.
ROM FAIL
SAV SET FAIL
One or more of the sets of user settings
is missing or has become corrupted.
SERVICE FAIL
X
X
X
The instrument’s service data is missing
or has become corrupted.
THRU PATH FAIL
THRU FAIL
A failure was detected in the
through-path circuit of Channel 2.
X
X
VCO/COUNT CHAIN FAIL
VCO/CNT FAIL
X
A failure was detected in the VCO or the
Count Chain.
Operating Guide
B-5
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix B Messages
Error Messages
B-6
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix C Using the Battery Option
Overview
Overview
The Battery option (Option 002) allows you to operate the Counter away
from a source of AC power using internal rechargeable batteries or the
external DC (EXT DC) power connector on the rear panel. You can charge
the batteries inside the Counter when you are not using it, if an AC power
source is available. (To charge the batteries inside the Counter, it must be
in Standby mode.) You can also charge the batteries outside the Counter
using an AC or suitable DC power source and the optional External
Charger (Agilent P/N 53150-60217).
Operating the Counter from the Batteries
When the Counter is powered from the internal batteries, it operates in
the same manner as it does when it is powered from an external AC or DC
source, except that the cooling fan does not operate, and the Main AC
Power On LED is not lit. Whenever a battery-equipped Counter is on
(not in Standby), the battery annunciator in the lower-right corner of the
front-panel display (see Figure C-1) indicates the approximate charge
level remaining in the batteries. This allows you to estimate the amount of
time you can continue to operate from battery power before recharging the
batteries or replacing them with fully charged batteries.
Battery Charge Indicator
Figure C-1. Battery Charge Level Indicator
C-2
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix C Using the Battery Option
Operating the Counter from a DC Power Source
When all three segments of the battery annunciator are activated, the
battery charge level is at 83% or more. When only two segments are
activated, the charge level is approximately 50%, and when only the first
segment is activated, the charge level is approximately 17%.
A pair of fully charged batteries in good condition provides enough power
to operate the Counter for approximately three hours at 25º C. Various
conditions, such as ambient temperature and the measurement configuration,
can affect the length of time the Counter can operate from a fully charged
set of batteries.
A battery that reads approximately 13.6 VDC when measured with a
voltmeter (or the Battery Voltage reading in the menu display) is fully
charged. A battery that reads 11 VDC or less is at or near the minimum
effective charge level.
NOTE
Operating the Counter with the display backlight turned off lengthens the
time the Counter can operate from the batteries. When operating from
battery power, the Counter automatically turns the backlight off after five
minutes if no front-panel keys are pushed, no GPIB commands are
received, and/or no signal is applied to either input during that period.
Operating the Counter from a
DC Power Source
Counters that have the Battery option can operate from an external DC
power source must supply +11 to +18 VDC at 2.0 A (min.). It must use a
2.1 mm coaxial plug, and its DC output plug must be wired so the inner
connector is positive and the outer connector is negative. To use an
external DC power source, make sure the Main ~ Power switch on the back
panel is set to 1 (on), insert the coaxial plug into the EXT DC socket on
the back panel as shown in Figure C-2, and turn the Counter on in the
normal manner.
Operating Guide
C-3
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix C Using the Battery Option
Replacing the Batteries
Made in U.S.A.
with domestic and foreign content
ISM 1-A
OPTIONS
001 Oven Time Base
002 Battery
Main ~ Power
Reference 10 MHz
Auxillary
WARNING:
In
To avold electric shock,
do not remove covers.
No user-serviceable parts inside.
or
Out
Refer all servicing to qualified personnel.
This unit must be earth grounded.
11 TO 18 VDC
EXT DC
AC POWER
100 – 130 VAC, 50/60/400 Hz 75 VA
220 – 240 VAC, 50/60 Hz 75 VA
FUSE
1.0 A T
250 V
RS-232
Main AC Power Indicator
External DC Input Connector
Figure C-2. External DC Power Socket
Replacing the Batteries
Counters equipped with the Battery option use sealed lead-acid VHS
camcorder batteries. You can obtain additional batteries of this type from
Agilent (Agilent P/N 53150-80010) and from other suppliers who carry
test equipment and/or video camera accessories.
Removing the Batteries
To remove the batteries, use the following procedure:
1
2
Turn off the Counter, and disconnect all external cables (including the
power cord).
Turn the two thumb screws that secure the battery sled to the Counter’s
back panel counterclockwise until both thumb screws are completely out
of the threaded holes in the back panel (see Figure C-3).
C-4
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix C Using the Battery Option
Replacing the Batteries
NOTE
The thumbscrews require a considerable amount of turning force, since
they pull the battery sled partially out of the Counter and also extract the
battery terminals from the battery connector as you turn them. To prevent
the battery sled from binding and increasing the force necessary to turn
the thumbscrews, either turn both thumbscrews simultaneously, or
alternately turn the thumbscrews one-half turn each, until both
thumbscrews are fully out of the threaded holes in the back panel.
3
4
Slide the battery sled out the back of the Counter.
CAUTION
Avoid placing the battery sled and/or the batteries where the battery
terminals could contact any conductive surfaces.
Lift the terminal end of either or both batteries up out of the battery sled,
and then pull the battery(ies) out of the sled.
Installing Batteries
To install batteries in the Counter, use the following procedure:
1
2
If you have not previously removed the battery sled from the Counter and
the batteries from the sled, do so now (see “Removing the Batteries” on the
previous page).
Position the battery sled so that the back (taller) end is to your left as
shown in Figure C-3
Operating Guide
C-5
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix C Using the Battery Option
Replacing the Batteries
3
2
a
o
e
R
e
fe
re
U.S.
n
ce
8
0
M
H
z
A
I
n
uxlary
o
r
u
O
t
1
T
O
1
1
V
t
E
l
X
T
D
C
i
l
I
R
S
-
2
3
2
,
.,
l
3
Made in U.S.A.
w
it
h
d
o
m
e
s
t
ic
a
n
d
f
o
r
e
ig
n
c
O
o
n
t
e
P
O
B
n
t
T
0
0
0
0
IO
1
2
v
N
S
e
t
n
e
r
a
T
y
t
im
ISM 1-A
W
o
o
e
B
a
4
A
T
d
R
s
e
N
a
v
I
o
N
n
l
d
r
o
G
N
t
e
l
o
e
e
e
:
m
s
c
e
R
T
u
e
s
t
s
o
r
i
e
v
v
c
f
r
l
s
h
-
l
r
c
o
h
a
n
e
o
i
r
v
e
c
s
s
m
i
k
.
u
AC POWER
e
c
c
,
e
r
r
i
t
v
s
a
g
e
i
t
b
i
l
100-300 VAC,
u
50/6
n
0/4e00 Hz 75 VA
1.0
A
T
p
t
a
b
o
a
r
t
s
q
h
220-240 VAC, 50/60 Hz
e
75 VA
i
n
i
f
250
V
u
a
s
r
l
r
i
d
e
t
i
e
g
d
.
o
p
e
u
e
d
F
n
r
s
d
o
n
.
n
e
l
.
5
1 Thumbscrews
2 Batteries
4 Battery chamber
5 Battery sled
3 Battery terminals
Figure C-3. Removing and Installing Batteries
C-6
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix C Using the Battery Option
Replacing the Batteries
3
Holding one of the batteries so the battery terminals are to your right and
the plus sign at the terminal end is facing away from you, insert the
left-hand end of the battery into the taller end of the battery sled with the
far side of the battery against the far side of the sled. Lower the right end
of the battery into the sled, and push down on the battery until it is down
as far as it can go. Insert the second battery next to the first one in the
same manner.
NOTE
The batteries fit snugly into the sled, so it is important to keep them
aligned with the sides of the sled. If you attempt to insert a battery, and it
is not parallel with the sides of the sled, it will bind.
4
5
When both batteries are fully inserted in the sled, insert the sled into the
battery-chamber opening in the Counter’s back panel (terminal end first).
Slide the sled into the battery chamber until you can start the thumb-
screws into the threaded holes in the Counter’s back panel (turn the
thumbscrews clockwise). You may have to push against the back end of
the battery sled to insert it far enough for the thumb screws to contact the
back panel.
6
Tighten the two thumb screws on the battery sled until both thumbscrews
are fully hand tight and the back cover of the battery sled is flush against
the Counter’s back panel.
NOTE
The thumbscrews require a considerable amount of turning force, since
they push the battery sled into the Counter and also insert the battery
terminals into the battery connectors as you turn them. To prevent the
battery sled or the terminals from binding or jamming, either turn both
thumbscrews simultaneously, or alternately turn the thumbscrews
one-half turn each, until the battery sled is fully inserted.
Operating Guide
C-7
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix C Using the Battery Option
Charging the Batteries
Charging the Batteries
The batteries are charged automatically whenever the instrument is
connected to an AC power source and is in Standby mode. The amount of
time required to fully charge the batteries is dependent on several factors,
ambient temperature, and the power source used for charging. In general,
it takes approximately eight hours to charge two batteries inside the
instrument.
The Agilent part numbers for the batteries are provided in the section
titled “Accessories Supplied and Available” on page xiv.
C-8
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix C Using the Battery Option
Precautions
Precautions
Observe the following precautions when handling and charging the
batteries:
•
Do not attempt to use or charge the batteries when they are exposed to
temperatures below –10º C (15º F) or above 40º C (105º F). (Most
batteries of this type have an internal safety device that prevents
them from operating outside of this temperature range.)
•
Charge the batteries only with a charger intended for this type of
battery or inside the Counter.
•
•
•
•
Do not allow the battery terminals to contact any conductive surfaces.
Avoid discharging the batteries completely.
Recharge the batteries as soon as possible after use.
Handle the batteries carefully to avoid internal damage and/or
damage to the casings. Do not drop or throw the batteries or otherwise
expose them to strong physical shock.
•
Do not incinerate the batteries or subject them to extremely high
temperatures.
Operating Guide
C-9
Download from Www.Somanuals.com. All Manuals Search And Download.
Appendix C Using the Battery Option
Precautions
C-10
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
Avg On, 1-5, 2-18
SYMBOLS
(Freq Offset), 1-20
(Resol key), 2-45
A
AC Input/Power module, 1-7
Accessories
Battery compartment, 1-7
Available, xiv
Supplied, xiv
analog, 1-5
analog power display, 2-24
Analog power display, 1-5
Avg On, 1-5
Ch1, 1-5
Ch2, 1-5
Error, 1-5
Ext Ref, 1-5
Freq, 1-5
Freq Offset, 1-5
Hold, 1-5
Pwr, 1-5
Rel Freq, 1-5
Rel Pwr, 1-5
Rmt, SRQ, 1-5
full charge, C-3
Shift, 1-5
arrow keys, 2-5
AUTO, 2-7, 2-46
Auxiliary connector, 1-7
average, 2-17
installing batteries, C-5
Average / Power Offset key, 1-2
Averages (Avg key), 2-45
Averages Setting Example, 2-17
averages-setting mode, 2-17, 2-18
Operating Guide
Index-1
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
operating the Counter from a DC
Connector
batteries, C-2
rechargeable batteries, C-2
battery sled, C-4, C-5
battery voltage level, 2-40
BAUD, 2-7, 2-40, 2-41
dB, dBm, 1-5, 2-24
dBm/W key, 2-25, 2-45
C
calibration, 2-43
Ch 1 annunciator, 2-13
CH 1 NO SIGNAL, B-2
Ch 2 annunciator, 2-12
CH 2 NO SIGNAL, B-2
CH1 LPF, 2-7, 2-40, 2-45
CH1 NO SIGNAL, 1-18, 2-13
CH2 NO SIGNAL, 1-18, 2-12
Changing States, 2-7
Channel 1 Low-Pass Filter, 2-7, 2-45
Channel 1 Low-Pass Filter (CH1
LPF), 2-45, 2-46
Display backlight, 2-10
CHANNEL 2, B-2
connector, 1-18
Channel 2 input connector, 1-2
Channel selection, 2-10
Channel Selection (Chan Select key), 2-45
Channel Selection key, 1-2
charge level, C-2
Clear / Backlight On/Off key, 1-2
Clear key, 1-14, 2-9, 2-40
Index-2
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
E
electro-static discharge prevention
procedure, 1-17
Error, 1-5
Error Messages, B-4
–12V FAIL, B-4
12V FAIL, B-4
–5V FAIL, B-4
ADC FAIL, B-4
EEP WRT FAIL, B-4
FPANEL FAIL, B-5
FPGA FAIL, B-5
GPIB FAIL, B-5
HET PATH FAIL, B-5
IIC FAIL, B-5
INSTCFG FAIL, B-5
OVERTEMP, B-5
PATH FAIL, B-4
PWR CAL FAIL, B-5
PWR CKT FAIL, B-5
RAM FAIL, B-5
SAV SET FAIL, B-5
SERVICE FAIL, B-5
THRS THRU, B-4
THRU FAIL, B-5
Frequency offset measurement, 2-10
VCO/CNT FAIL, B-5
ESD, 1-17
EXT, 2-7, 2-39, 2-41, 2-42
EXT DC power-input connector, 1-7
EXT DC socket, C-3
Ext Ref, 1-5
EXTernal, 2-39
External Charger, C-2
external DC power connector, C-2
external DC power source, C-3
External Reference connector, 1-7, 1-12
external reference signal, 2-4, 2-42
external timebase, 2-40
Chan Select key, 2-4, 2-10
Channel 1 input connector, 1-2
Channel 2 input connector, 1-2
Channel Selection key, 1-2
Clear / Backlight On/Off key, 1-2
Clear key, 2-9
Operating Guide
Index-3
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
Enter key, 1-2
measurement rate, 1-3
Gater LED Indicator
Freq Offset key, 2-4
Gate indicator, 1-2
GPIB key, 2-10
Menu key, 2-4
Menus at a Glance, 1-4
Offset On/Off / Relative Frequency
key, 1-2
Offset On/Off / Relative Power
key, 1-2
Power/Standby switch, 1-2
Pwr Offset key, 2-4
Rate key, 2-4, 2-10
Rel Freq key, 2-10
Input Channel
Rel Pwr key, 2-11
Reset/Local / Menu key, 1-2
Resol key, 2-4, 2-10
Selection (arrow) keys, 1-2
Selection keys, 2-5
INT, 2-7, 2-39, 2-41
INTernal, 2-39
Shift key, 1-2
Sign (+/–) key, 1-2
Sign key, 2-5
Front panel
Rel Freq key, 1-19
Rel Pwr key, 1-24
Front Panel at a Glance, 1-2
front-panel keys, 2-10
full charge, C-3
fully charged, C-3
Function Selection Keys, 2-10
Fuse Holder, 1-7
Index-4
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
serial number, 1-14
L
LED Display
left pointer, 1-6
Legend
icons, 1-9
minimum battery voltage, 2-43
LO, 1-23
Lock Link Kit, A-2
LOSS, 2-36
loss value, 2-30
Low-Pass Filter, 2-40, 2-45
low-pass filter, 2-46
M
Main Power switch, 1-7
main power switch, 1-10
Manuals, supplied, xiv
Measurement Rate (Rate key), 2-45
measurement resolution, 1-3
Measuring Power, 1-22, 2-24
MED, 2-7, 2-16
Offset On/Off / Relative Frequency
2-27
ON, 2-7
On/Off (Clear) key, 1-11
On/Off key, 2-45
Operating Hours (OP HOURS), 2-43
operating modes, 2-5
changing settings, 1-12
displaying, 1-12
firmware version number, 1-14
model number, 1-14
navigating, 1-12
Operation Hours, 1-14
option codes, 1-14
Preset, 1-14
Operating Guide
Index-5
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
Operating the Counter from a DC
Power Source, C-3
Operating the Counter from the
Batteries, C-2
Operation
acknowledging messages, 2-9
changing states, 2-7
displaying the Menu, 1-12
function selection keys, 2-10
measuring frequency, 1-17, 2-12
measuring power, 1-22
measuring relative power, 1-24, 2-26
navigating in the Menu, 1-12
changing settings, 2-41
OPTNS, 2-40
Planar Crown, 1-18
Power Correction
numeric entry, 2-6
offsetting a frequency
disabling, 2-33
loss, 2-33
measurement, 1-20, 2-21
offsetting a power measurement, 1-24,
2-27
operating the Counter from the
batteries, C-2
selecting the input channel, 1-16
selecting the unit of measurement
for power, 1-23
2-16
Power Correction Example
Power Correction function, 2-30
power loss, 2-30
Power measurement, 1-5
power measurement, 2-24
Power Measurement Example, 2-24
Power Measurement Units (dBm/W
key), 2-45
setting the number of averages, 2-17
setting the resolution and the
measurement rate, 2-14
using Power Correction, 2-30
using the Clear and Reset/Local
keys, 2-9
using the Menu, 1-12, 2-39
using the selection keys, 2-5
Operation Hours, 1-14, 2-42
Operation
Index-6
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
Power Offset, 1-24, 1-25, 2-45
Power Offset (POWER Offset On/Off
key), 2-45
Power Offset Example, 2-27
Power Offset function, 1-24, 2-27
Power switch, 1-10
precision, 2-14, 2-17
Reference Oscillator function, 2-39
PRESET, 2-40, 2-45
Preset, 1-14, 2-45
Pwr, 1-5
Pwr annunciator, 2-24
PWR CORR, 2-38
PWR CORR> OFF, 2-33
Pwr Offset, 1-5, 2-4, 2-27
Pwr Offset key, 2-28
Q
Quick Reference Guide, xv
R
Rack Mount Kit, A-2
Rate, 1-19, 2-4
rate, 2-14
Rate / Frequency Offset key, 1-2
Rate key, 2-7, 2-10, 2-16, 2-45
Rate setting, 2-14
Rate Setting Example, 2-16
rate-setting mode, 2-16
Rear Panel, 1-7
Replacing the Batteries, C-4
Reset/Local / Menu key, 1-2
Reset/Local key, 1-14, 2-4, 2-9, 2-16, 2-19
Resol, 2-4
Resol key, 2-7, 2-10, 2-15, 2-45
Resolution, 1-19, 2-7, 2-10
AC Input/Power module, 1-7
Auxiliary connector, 1-7
Battery compartment, 1-7
EXT DC power-input connector, 1-7
External Reference connector, 1-7
Fuse Holder, 1-7
GP-IB Interface connector, 1-7
Operating Guide
Index-7
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
resolution, 2-14
Resolution / GPIB key, 1-2
Resolution setting, 2-14
Resolution Setting Example, 2-15
right pointer, 1-6
RJ12, 1-7
Rmt, 1-5
routine maintenance, 2-43
RS-232, 2-40, B-3
Shift key, 1-2, 2-5
Sign (+/–) key, 1-2, 2-5, 2-28
RS-232 Interface
RS-232 Interface connector, 1-7
RS-232 serial port, 2-46
RS-232 Serial Port Data Rate
(BAUD), 2-46
Specifications
Standby, 1-3
S
SAVE, 2-40, 2-45, 2-46
Save and Recall functions, 2-46
Save Settings (SAVE), 2-45
Selecting a Correction Profile, 2-33
Power, 1-23
Selection keys, 2-5, 2-8
Self Test, 2-43
Self-Test, B-3
Self-Test Messages, B-3
Sequencing Through the Menu, 2-5
serial interface, 2-4
Serial Number, 2-43
serial number, 1-14, 2-40, 2-42
serial port, 2-4, 2-40
Serial Port Baud Rate, 2-7
Index-8
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
U
units of measurement annunciator
group, 2-25
user setting, 2-40
Using the Clear and Reset/Local
Keys, 2-9
Using the Menu, 2-39
Using the Selection Keys, 2-5
V
version number, 2-44
W
W, mW, uW, 1-5, 2-24
Operating Guide
Index-9
Download from Www.Somanuals.com. All Manuals Search And Download.
Index
Index-10
Operating Guide
Download from Www.Somanuals.com. All Manuals Search And Download.
Service and Support
Contacting Agilent Technologies:
For more information about Agilent test and measurement products, applications, and services, visit our web site
at http://www.agilent.com/services/English/index.html.
Agilent’s Test and Measurement Fax Service for United States and Canada:
Technical information for test and measurement products and services is available 24 hours a day, 7 days a week, by
calling 1-800-800-5281.
Technical Support:
If you need technical assistance with an Agilent test and measurement product or application, you can find a list of local
service representatives on the web site listed above. If you do not have access to the Internet, one of the following centers
can direct you to your nearest representative:
Asia Pacific:
Japan:
Hong Kong, SAR
Measurement Assistance Center
Tokyo, Japan
Tel: (852) 2599-7777
Fax: (852) 2506-9284
Tel: 81-426-56-7832
Fax: 81-426-56-7843
Australia/New Zealand:
Blackburn, Victoria, Australia
Latin America:
Latin America Region Headquarters
Miami, FL, U.S.A.
Tel: 1-800-629-485 (Australia)
Tel: 0-800-738-378 (New Zealand)
Fax: (61-3) 9272-0749
Tel: (305) 267-4245
Fax: (305) 267-4288
Canada:
Mississauga, ON, Canada
United States:
Test & Measurement Call Center
Englewood, CO, U.S.A.
Tel: 877-894-4414
Fax: (905) 206-4700
Tel: (800) 452-4844
Fax: (303) 662-3726
Europe:
European Marketing Organisation
The Netherlands
Tel: +31 20 547 9999
Fax: +31 20 547 7799
Printed in U.S.A
Data subject to change
Rev 07/01
Download from Www.Somanuals.com. All Manuals Search And Download.
Continued from front matter. . .
Warranty (cont’d)
Agilent will be liable for damage Safety Considerations
For continued protection
against fire, replace the line
fuse(s) with fuses of the same
current rating and type (for
example, normal blow, time
delay). Do not use repaired
fuses or short-circuited
fuseholders.
to tangible property per incident
up to the greater of $300,000 or
the actual amount paid for the
product that is the subject of the
claim, and for damages for
bodily injury or death, to the
extent that all such damages
are determined by a court of
competent jurisdiction to have
been directly caused by a
(cont’d)
Agilent does not warrant that
the operation of Agilent
WARNING
INSTRUCTIONS FOR
products will be uninterrupted
or error free. If Agilent is
unable, within a reasonable
time, to repair or replace any
product to a condition as
warranted, customer will be
entitled to a refund of the
purchase price upon prompt
return of the product.
ADJUSTMENTS WHILE
COVERS ARE REMOVED
AND FOR SERVICING ARE
FOR USE BY SERVICE-
TRAINED PERSONNEL
ONLY. TO AVOID
Acoustic Noise Emissions
defective Agilent product.
LpA<47 dB at operator position,
at normal operation, tested per
EN 27779. All data are the
results from type test.
DANGEROUS ELECTRIC
SHOCK, DO NOT PERFORM
SUCH ADJUSTMENTS OR
SERVICING UNLESS
TO THE EXTENT ALLOWED
BY LOCAL LAW, THE
Agilent products may contain
remanufactured parts
REMEDIES IN THIS
equivalent to new in
WARRANTY STATEMENT
ARE CUSTOMER’S SOLE AND
EXCLUSIVE REMEDIES.
EXCEPT AS INDICATED
ABOVE, IN NO EVENT WILL
AGILENT OR ITS SUPPLIERS
BE LIABLE FOR LOSS OF
DATA OR FOR DIRECT,
SPECIAL, INCIDENTAL,
CONSEQUENTIAL
(INCLUDING LOST PROFIT
OR DATA), OR OTHER
DAMAGE, WHETHER BASED
IN CONTRACT, TORT, OR
OTHERWISE.
QUALIFIED TO DO SO.
Geräuschemission
performance or may have been
subjected to incidental use.
LpA<47 dB am Arbeits
platz, normaler Betrieb, geprüft
nach EN 27779.
Die Angagen beruhen auf
Ergebnissen von
Typenprüfungen.
WARNING
The warranty period begins on
the date of delivery or on the
date of installation if installed
by Agilent. If customer
schedules or delays Agilent
installation more than 30 days
after delivery, warranty begins
on the 31st day from delivery.
ANY INTERRUPTION OF THE
PROTECTIVE GROUNDING
CONDUCTOR (INSIDE OR
OUTSIDE THE PRODUCT’S
CIRCUITRY) OR
DISCONNECTING THE
PROTECTIVE EARTH
TERMINAL WILL CAUSE A
POTENTIAL SHOCK
Electrostatic Discharge
Immunity Testing
When the product is tested with
8kV AD, 4kV CD and 4kV ID
according to IEC801-2, a system
error may occur that may affect
measurement data made during
these disturbances. After these
occurrences, the system self-
recovers without user
Warranty does not apply to
defects resulting from
HAZARD THAT COULD
RESULT IN PERSONAL
INJURY. (GROUNDING ONE
CONDUCTOR OF A TWO
CONDUCTOR OUTLET IS
NOT SUFFICIENT
(a) improper or inadequate
maintenance or calibration,
(b) software, interfacing, parts
or supplies not supplied by
Agilent, (c) unauthorized
modification or misuse,
For consumer transactions
in Australia and New
Zealand: the warranty terms
contained in this statement,
except to the extent lawfully
permitted, do not exclude,
restrict or modify and are in
addition to the mandatory
statutory rights applicable
to the sale of this product to
you.
intervention.
PROTECTION.)
(d) operation outside of the
published environmental
specifications for the product, or
(e) improper site preparation or
maintenance.
Whenever it is likely that the
protection has been impaired,
the instrument must be made
inoperative and be secured
against any unintended
operation.
TO THE EXTENT ALLOWED
BY LOCAL LAW, THE ABOVE
WARRANTIES ARE
Assistance
Product maintenance
If this instrument is to be
energized via an
autotransformer (for voltage
reduction), make sure the
common terminal is connected
to the earthed pole terminal
(neutral) of the power source.
EXCLUSIVE AND NO OTHER
WARRANTY OR CONDITION,
WHETHER WRITTEN OR
ORAL, IS EXPRESSED OR
IMPLIED AND AGILENT
SPECIFICALLY DISCLAIMS
ANY IMPLIED WARRANTIES
OR CONDITIONS OF
agreements and other customer
assistance agreements are
available for Agilent products.
For any assistance, contact your
nearest Agilent Sales and
Service Office.
MERCHANTABILITY,
Instructions for adjustments
while covers are removed and
for servicing are for use by
trained personnel only. To avoid
dangerous electric shock, do not
perform such adjustments or
servicing unless qualified to do so.
SATISFACTORY QUALITY,
AND FITNESS FOR A
PARTICULAR PURPOSE.
7.C.NL.07.31.00.R1.M.CW6FC
Download from Www.Somanuals.com. All Manuals Search And Download.
DECLARATION OF CONFORMITY
According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014
Manufacturer’s Name:
Agilent Technologies, Inc.
Manufacturer’s Address: 5301 Stevens Creek Blvd
Santa Clara, California 95051
U.S.A.
Declares, that the product
Product Name:
Model Number:
Product Options:
CW Microwave Frequency Counter
53150A, 53151A, and 53152A
This declaration covers all options of the above product.
Conforms with the following European Directives:
The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the
EMC Directive 89/336/EEC (including 93/68/EEC) and carries the CE Marking accordingly.
Conforms with the following product standards:
EMC
Standard
Limit
[1]
IEC 61326-1:1997+A1:1998 / EN 61326-1:1997+A1:1998
CISPR 11:1990 / EN 55011:1991
Group 1 Class A
4kV CD, 8kV AD
IEC 61000-4-2:1995+A1:1998 / EN 61000-4-2:1995
IEC 61000-4-3:1995 / EN 61000-4-3:1995
IEC 61000-4-4:1995 / EN 61000-4-4:1995
IEC 61000-4-5:1995 / EN 61000-4-5:1995
IEC 61000-4-6:1996 / EN 61000-4-6:1996
IEC 61000-4-11:1994 / EN 61000-4-11:1994
3 V/m, 80-1000 MHz
0.5kV signal lines, 1kV power lines
0.5 kV line-line, 1 kV line-ground
3V, 0.15-80 MHz I cycle, 100%
Canada: ICES-001:1998
Australia/New Zealand: AS/NZS 2064.1
[1]
The product was tested in a typical configuration with Agilent Technologies test systems.
IEC 61010-1:1990+A1:1992+A2:1995 / EN 61010-1:1993+A2:1995
Canada: CSA C22.2 No. 1010.1:1992
Safety
July 31, 2001
Date
Art Nanawa
Product Regulations Manager
For further information, please contact your local Agilent Technologies sales office, agent or distributor.
Authorized EU-representative: Agilent Technologies Deutschland GmbH, Herrenberger Straβe 130, D 71034 Böblingen, Germany SA
Download from Www.Somanuals.com. All Manuals Search And Download.
DC.fm Page 2 Monday, July 22, 2002 10:51 AM
Download from Www.Somanuals.com. All Manuals Search And Download.
|