AMX AutoPatch Modula, Instruction Manual, Page: 106 / 191

Stereo Audio Boards
100 Modula Instruction Manual
To attach stereo audio input and output wires:
1.
Unscrew the clamps on the audio connector.
2.
Insert the wires (for wire placement for balanced and unbalanced audio, see FIG. 63) and firmly
re-tighten the clamps to make proper connections.
Note: For stereo audio signals using twisted pair wire, connect the shield (ground) only at one end
(recommend receiving end) to minimize low frequency noise .
Adjusting Output Volume
Most stereo output boards in a Modula can be ordered with either potentiometer volume control or digital
volume control. Either adjustment can be made at any time during normal operation. When audio is adjusted
for a device on one level, the adjustment remains in effect for that device on all levels switching audio signals.
Potentiometer Output Boards
Stereo output boards are set to unity gain at the factory.
To adjust output volume using potentiometers:
1.
Route a source (input) to the first destination (output).
2.
Adjust the output volume for the destination to the desired dB level by turning the corresponding
potentiometer (FIG. 64) clockwise (to the right) to decrease volume or counterclockwise (to the left) to
increase volume.
3.
Repeat for all destinations that require adjustment.
FIG. 63
Stereo audio balanced and unbalanced wiring
FIG. 64
Output gain adjustment pots
Balanced audio Unbalanced audio
OUT
4
3
2
1
Output 1, Left Stereo Channel
Output 1, Right Stereo Channel
Output 2, Left Stereo Channel
Output 2, Right Stereo Channel