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audio path by tying the like-format PROGRAM INPUT and OUTPUT
connectors together. The green COMP LED remains unlit until
the warm-up period is completed.
Notice that the relay-bypass circuit can only connect
like style PROGRAM connectors together, i.e., XLR in
to XLR out, and TRS in to TRS out. For example, if the
XLR PGM input is being used and the bypass mode is asserted,
no pass-through signal will be heard on the TRS PGM output
jack. In this case, the pass-through signal will be heard at
the XLR PGM output.
Step 4: front panel control initial start-up positions.
Position the front panel potentiometers and switches at the
following starting points:
INPUT = 0 Db,
THRESHOLD = -15 dB,
ATTACK = 35 ms,
RELEASE = 150 ms,
RELEASE MODE = LOG
RATIO = 1:1 (compression disabled),
OUTPUT = 0 dB,
METER = IN,PGM position,
COMPressor (hard-wire bypass switch) = IN,
LINK = LOCAL,
SIDE CHAIN SOURCE = INT,
SIDE CHAIN EQ LF = 0 dB, HF = 0 dB, and
GLORY = EARTH.
After the 30-second warm-up period, the compressor’s VU meter
should show PGM IN activity derived from the signal hitting
the PROGRAM INPUT jacks, and, if the COMP switch is in the
“IN” position, the green COMP LED will illuminate. Adjust the
INPUT control to get an average VU meter reading of 0 if need
be. It is OK if the meter gently hits the positive end-stops
on signal peaks; the compressor input circuitry has lots of
headroom. The uncompressed signal should be audible at the
PROGRAM OUTPUT jacks. Then:
A. Rotate the METER switch to the OUT, +8 position, or
whichever position best suits your production plant’s
operating level. The soon-to-be processed (output) signal
level should be visible on the VU meter and audible on any
attached outboard monitoring gear.
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