AMX AutoPatch Modula, Instruction Manual, Page: 122 / 191

Microphone Input and Phantom Power Boards
116 Modula Instruction Manual
Attaching Wires
When attaching wires, refer to the sheet labeled “AutoPatch Modula Connector Guide” that ships with
the system. The sheet shows you where to attach each wire on the rear of each enclosure. Follow the
sheet exactly; the system was programmed at the factory to operate
only as indicated on the sheet.
Caution: If the enclosure contains the optional microphone power board, make sure the phantom
power selection switches (FIG. 74) are set to “OFF” before connecting wires.
To attach wires to the microphone input board:
1.
Set phantom power switches to “OFF” (FIG. 74).
2. Loosen the wire clamps on the three-position connector. Be sure the clamps are open all the way,
but do not remove the screws from the connector.
3.
Insert the proper wires (FIG. 74) and firmly re-tighten the clamp screws to make proper connections
Turning the Microphone Input Board On
When power is applied to the Modula, microphone input boards come up in a muted state. The
appropriate BCS command must be sent to the microphone board to turn it on (see below) and to obtain
the equivalent to unity gain.
Currently the software is set to return the board to the previous dB level any time power has been off and
then restored.
To turn on the microphone board:
1.
Enter the following BCS command into HyperTerminal:
CL#I#VA0T (This is the BCS Absolute command for adjusting an input to unity gain.)
Replace the “
#
” with the appropriate level and input (source).
BCS commands are used to control the decibel level. For information on adjusting input gain using BCS
commands, see the
Instruction Manual – BCS Basic Control Structure Protocol on the AMX AutoPatch
CD or at www.amx.com .
FIG. 74
Loosen wire clamps, insert wires, and re-tighten clamp screws
Ground
Positive (+)
Negative (-)
Phantom power selection switches.
Set to “OFF” before attaching wires
or setting compression ratio
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