Gain Adjustment; Cmrr Adjustment; Figure 6-4 Cmrr Adjustment - Honeywell VideoBloX User Manual

AUDIO INPUT MODULE
ADJUSTMENTS

Gain Adjustment

CMRR Adjustment

Rev 1.0
Adjust the front panel gain control to an optimum level for the input source for each channel.
This level will result in a bright LED indication for "Signal", with only occasional flashes of
the "Peak" LED when the input signal is at the maximum expected level.
This adjustment sets the common mode rejection for the balanced
inputs. It is factory calibrated and should not be adjusted by the user.
The optimum level is that where a minimum output signal is obtained
when both + and - input signals are driven by the identical signal
(inputs shorted).
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Figure 6-4 CMRR Adjustment
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10/06