Bogen Air Compressor CMP1R User Manual

CMP1R  
Compressor Limiter  
Output Module  
Features  
Threshold control  
Compressor ratio  
Make-up gain  
Bypass switch  
Unbalanced input  
Gradual fade back from mute  
Printed in Korea.  
0112  
© 2001 Bogen Communications, Inc.  
54-2068-01R1  
Specifications subject to change without notice.  
 
Module Installation  
Jumper Selections  
Priority Level  
1. Turn off all power to the unit.  
2. Make all necessary jumper selections.  
Jumper placement only affects the unbalanced input signal. The  
jumper placement determines whether the module’s input can be  
muted by other input modules.When enabled, the input is per-  
manently set to the lowest priority level.  
3. Position module in front of desired output module bay  
opening, making sure that the module is right-side up.  
Output modules will not fit in input module bays. Do  
not force an output module into an input module bay.  
Hard / Soft Knee Jumpers  
4. Slide module on to card guide rails. Make sure that  
both the top and bottom guides are engaged.  
For “brick wall” limiting and hard knee compression, set the J32  
jumper to ‘Hard.’ For soft knee compression, set the J32 jumper  
to ‘Soft.’  
5. Push the module in to the bay until the faceplate con-  
tacts the unit’s chassis.  
6. Use the two screws included to secure the module to  
the unit.  
Module Features  
When set to lower compression levels, the CMP1R can be used  
as a compressor to minimize the differences in level of all of the  
inputs on the mix bus, or, when set to maximum compression, it  
can be used as a limiter to keep overall output at a desired level.  
All Bogen output modules include an unbalanced input that is  
controlled by the amplifier’s input control so that the user is not  
penalized in number of inputs when using an output module.  
WARNING:  
Turn off power to unit and make all jumper  
selections before installing module in unit.  
Threshold  
Controls the minimum necessary mix bus signal level to trigger the module to  
begin compression. Clockwise rotation increases the necessary signal level  
required to trigger compression.The threshold is adjustable from -40dBV to  
+10dBV with the center of rotation being approximately -10dBV.  
Compression Ratio  
The compression ratio control is adjustable in order to alter the dynamics  
of the signal above the limiting threshold.In the minimum position,the action  
of the compressor is light (compression ratio 2:1, approximately), thereby  
resulting in mild compression.The maximum position provides “brick wall”  
limiting (infinite compression ratio), where no further increase above the  
threshold level will occur in the output signal.  
Make-Up Gain  
Provides additional gain after the signal has been compressed to reestablish the  
nominal system signal level.The make-up gain has a range of 0dB (unity gain)  
to +15dB. Care should be taken not to overdrive the amplifier’s input when  
applying this additional gain.  
Input  
The RCA unbalanced input provides a 20k-ohm input impedance.The unbal-  
anced input connects to the amplifier’s front level control for the bay in  
which it is installed so that the input is not lost when using the output mod-  
ule.  
Compressor Bypass Switch  
The Compressor Bypass Switch provides instant comparison between com-  
pression and no compression during the tuning of the system.  
 

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