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INPUT LEVEL SET
OUTPUT LEVEL SET
LEVELING SPEED
Fig. 3-1. Simplified top view showing location of INPUT LEVEL SET,
OUTPUT LEVEL SET, and LEVELING SPEED SET on the Audio Processing
Board, common to both COMPELLOR Model 301 and 303 units.
3.3 Leveling Speed Set
The leveling release time of the COMPELLOR can be set to accommodate a
specific program like music or speech.
At the factory, the Model 300 is configured primarily for music, which
requires maximum control of dynamics with minimum effect on the audio
program. If your primary application is speech, you can modify the Model
300 for a faster leveling speed by changing a resistor on each Audio Process-
ing Board. Refer to the CIRCUIT MODIFICATIONS section for a detailed
procedure.
At the factory, Model 301 and 303 units are shipped with the Leveling Speed
Set in the MUSIC position. With this setting, the COMPELLOR will use a
longer release time to control general and music programs. If you want to
increase the leveling speed for dialogue or other intermittent applications,
remove the top cover, locate the Audio Processing Board, and turn the
Leveling Speed Select to the SPEECH position (see Fig. 3-1).
3.4 Audio I/O Connections
All COMPELLOR models use standard XLR type 3-pin connectors (on the
rear panel) for system interface of audio input(s) and output(s), as shown in
Fig 3-2. Equal polarity is maintained from input to output, so that you may
elect to use either pin 2 or pin 3 as high to match your balanced system. Also
be sure to use proper shielding techniques ( i.e. lifting the shield wire to the
input connection and connecting the shield wire to the output connection).
3-2 Installation
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