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Pelco Manual C543M-A (7/03) 39
5.1 DOWNFRAMING
The matrix bay can be set up in multiple configurations. When limited to 16 monitors
or less, the rear of the bay will be populated by two type of cards: the CM9760-RPC
(Rear Panel BNC card for video inputs, usually a Camera) and the CM9760-RPM
(
Rear Panel BNC card for Monitor output). These cards are different and are not
interchangeable. In addition, on single bay configurations, the jumpers on the
CM9760-RPC cards will be configured for termination–a necessary condition for
operation (refer to Figure 16). A single bay configuration is illustrated in Figure 29.
When it becomes necessary or desirable to downframe, several different scenarios,
each with different card populations, can occur.
Downframing requires that the Inputs of the first bay be electronically reflected or
mirrored in the video circuitry of all other bays downframed from the first. This will
increase, by 16, the number of monitors available for output for each additional bay
downframed.
There are two different available downframe cards, both of which have been dis-
cussed previously (refer to Section 2.2.4). One card is the CM9760-DFC (the “no
looping” downframe card) and the other is the CM9760-DFL (the “looping” downframe
card).
Figure 29. Single Bay Configuration–256 Cameras x 16 Monitors
SLOT POSITIONS
1-16
CARD TYPE
BAY 1
SLOT
POSITION 17
16
JUMPER