Honeywell VideoBloX, User Manual

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VideoBloX MODULES
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Place the jumper in the position shown as “Low Filter On” to enable the low pass filter
function. This reduces the level of signals above 6000 Hz
Figure 2-47 Jumper Setting for Low Pass or High Pass Filter
Adjustments
Gain Adjustment
Adjust the gain control on the front panel to an optimum level for each input. 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.
CMRR Adjustment
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).
Figure 2-48 CMRR Adjustment
Connecting a Microphone to the Audio Input Module
The following diagram shows how to connect a microphone to the Audio Input Card. Set
the phantom power jumpers on the audio input module as described in the
Phantom
Power and 20dB Pad Jumpers section.