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8910ADA-M/ST/SR — Instruction Manual
Module Configuration
Gain and Balance Settings
The overall gain of each channel can be controlled separately or together by
the operation of the two paddle switches, SW1 (BAL) and SW2 (GAIN), on
the front edge of the module. The fine gain and balance can be adjusted
±6 dB by using hard-wired potentiometers connected to BNCs J11 and J12.
•
SW1 (BAL)
– this paddle switch controls the balance between Channel 1
and Channel 2. When SW1 is pushed up (Position 1), the Channel 1
(left) gain is increased in increments of 0.1 dB while the Channel 2 gain
(right) is reduced in increments of 0.1 dB. The gain will continue until a
maximum increase in gain of + 6 dB has been reached.
Pushing the SW1 paddle switch down (Position 2) will cause the gain
of Channel 2 (right) to increase while Channel 1 (left) will decrease in
0.1 dB steps until a maximum increase in gain of + 6 dB is reached.
Holding the paddle in Position 1 or Position 2 for more than 1 second
will cause the gain to increase or decrease by 0.1 dB at a faster rate. The
total difference in gain between both channels is 12 dB.
•
SW2 (Gain)
– when SW1 is in the middle position, adjusting SW2 will
affect the gain of both channels equally. The gain will be changed in
increments of approximately 0.1 dB for each click of the paddle. Any
gain differences between channels will be maintained as the gain is
changed.
•
Fine Gain Hard-wired Potentiometer
(BNC J11) – fine gain can be adjusted
±6 dB when a customer-supplied potentiometer is hard-wired to BNC
J11 and the module is jumpered for LOC/POT mode. Refer to
Hard-wired Fine Gain/Balance Potentiometer Control
.
•
Fine Balance Hard-wired Potentiometer
(BNC J12) – fine balance can be
adjusted ± 6 dB when a customer-supplied potentiometer is hard-wired
to BNC J12 and the module is jumpered for LOC/POT mode. Refer to
Hard-wired Fine Gain/Balance Potentiometer Control
.
Power Cycle and Control Settings
When remote overrides have been set using the remote controls, the
OVR
LED illuminates. If power is cycled and no local jumper settings are
changed, the existing settings will be retained. The module will resume
operation as set remotely by the GUI and the
OVR
LED is again illuminated.
If any local jumper change is made during the power cycle with the module
removed from the frame, the module will boot up with the locally set
parameters and the
OVR
LED will be extinguished.