MIC1S
Microphone Input
Module
Features
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Transformer-balanced
Phantom power
Screw terminal connections
Gain/Trim control
Bass and treble contols
Audio gating
Gating threshold and duration adjustments
Variable threshold limiter
Limiter activity LED
4 levels of available priority
Can be muted from higher priority modules
Can mute lower priority modules
© 2002 Bogen Communications, Inc.
54-2077-01B 0701
Specifications subject to change without notice.
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Module Installation
Jumper Selections
Priority Level*
1. Turn off all power to the unit.
2. Make all necessary jumper selections.
This module can respond to 4 different levels of priority.
Priority 1 is the highest priority. It mutes modules with
lower priorities and is never muted. Priority 2 can be muted
by Priority 1 modules and mutes modules set for 3 or 4.
Priority 3 is muted by either Priority 1 or 2 modules and
mutes Priority 4 modules. Priority 4 modules are muted by
all higher priority modules.
3. Position module in front of desired module bay
opening, making sure that the module is right-
side up.
4. Slide module on to card guide rails. Make sure
that both the top and bottom guides are
engaged.
* The number of priority levels available is determined by
the amplifier the modules are used in.
5. Push the module in to the bay until the faceplate
contacts the unit’s chassis.
Gating
6. Use the two screws included to secure the mod-
ule to the unit.
Gating (turning off) of the modules output when insuffi-
cient audio is present at the input can be disabled.
Detection of audio for the purpose of muting lower prior-
ity modules is always active regardless of jumper setting.
WARNING:
Turn off power to unit and make all jumper
selections before installing module in unit.
Phantom Power
24V phantom power can be supplied to condenser microphones
when jumper is set to ON position. Set to OFF for dynamic mics.
Bus Assignment
This module can be set to operate so that the MIC signal can be sent
to the main unit’s A bus, B bus, or both buses.
Gate -Threshold (Thresh)
Gate - Duration (Dur)
Controls the minimum necessary input signal level to turn the module’s out-
put on and apply signal to the main unit's buses. Clockwise rotation increas-
es the necessary signal level required to produce output and mute lower
priority modules.
Controls the amount of time the output and mute signal of the module
remains applied to the main unit’s buses after the input signal falls below the
required minimum signal level (set by the threshold control).
Bass &Treble (Treb)
Limiter (Limit)
Provides separate controls for Bass andTreble cut and boost.The Bass control
affects frequencies below 100 Hz and Treble affects frequencies above 8 kHz.
Clockwise rotation provides boost, counterclockwise rotation provides cut.
Center position provides no affect.
Sets the signal level threshold at which the module will begin to limit the
level of its output signal. Clockwise rotation will allow more output signal
before limiting, counterclockwise rotation will allow less.The limiter moni-
tors the module’s output signal level,so increasing Gain will affect when lim-
iting takes place.An LED indicates when the Limiter is active.
Connections
Gain
Uses screw terminal block to make connections to the module’s input. The
input is low-impedance, transformer-balanced for excellent noise and ground
loop immunity.
Provides control over the level of input signal that can be applied to the
internal signal buses of the main unit. Allows a way to balance the input lev-
els of various devices so that the main unit controls can be set to relative-
ly uniform or optimum levels.
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