9. Attach any video and audio cables to the appropriate
connectors at the rear of the unit. See next section.
Most circuit board modules have several adjustments which are
carefully factory set with precision instruments for optimum
performance. Change only those which must be adjusted, some
controls when mis-adjusted produce little change under normal
operating conditions, but can seriously reduce the ability of the
unit to function correctly under other conditions which may be
encountered. Therefore, if you must adjust a control, place a mark
on it before moving it, so that it may be returned to its original
setting with reasonable accuracy.
SET-UP AND INSTALLATION
Locate a convenient place in your rack and mount the unit.
Next attach the Primary video signal to the input BNC connector
labeled (A INPUT). Then attach the Secondary video signal to the
BNC connector labeled (B INPUT). The BNC connector labeled (COM
OUTPUT) is the output of the video switch. The video that is
selected either manually or automatically will appear at this
connector.
FRONT PANEL SWITCH OPERATION
The switch near the middle of the unit marked "SWITCH" is a
manual/automatic selector for the video switch. When the switch is
in the "A" position, the video switch will stay in the "A" mode.
When the switch is in the "B" position, the video switch will stay
in the "B" mode. If the switch is left in the "AUTO" position, the
video switch will automatically switch from the "A" mode to the
"B" mode when a freeze frame that exceeds the time out occurs on
the "A" channel. In the AUTO mode the "COM" output will return to
the "A" channel when the video on "A" channel returns.
The switch near the bottom of the unit marked "RESET" is a
manual/hold/auto, reset selector. When the switch is in the
"MANUAL" position, the unit will be held in reset and no alarm
will occur, this position is also used momentarily to clear any
alarm condition. An alarm condition will operate the video switch
if you have selected that option with S5.
When the switch is in the "HOLD" position, if an alarm occurs
the alarm will stay on until the unit is manually reset. This is
useful in finding intermittent alarm conditions. This will also
cause the video to switch to the "B" channel and stay there until
the unit is manually reset.
If the switch is set to the "AUTO" position, the alarm
condition will be automatically reset when normal video returns to
the "A" channel input.
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