30 Rev 2.3 • 14 Oct 08
2. Introduction
Active Cards
Figure 2-23 shows the EM0463 module and wing connector:
Figure 2-23. Standard SWB Main Output Card with Wing
Analog Video
Incoming and outgoing analog video signals are received or distributed through 16 BNC connec-
tors housed on a backplane. (See Backplanes
on page 13.) The analog video input card and output
card manage NTSC and PAL signals transparently; no adjustment of jumper settings is required.
Input Card
The analog video input card (
EM0375) receives up to 16 analog video signals through backplane
I/O connectors. Incoming signals are directly coupled to a differential Op-amp, which act as input
buffers. The buffered outputs are applied to balanced bus drivers that forward the signal to the
motherboard.
Output Card
The analog video output card (EM0376) receives up to 16 signals from the motherboard. Incoming
analog video signals are buffered and converted to unbalanced video signals. The signals are then
forwarded to four crosspoint arrays (32 inputs x 16 outputs) for switching creating a 128 inputs x
16 outputs switching matrix. From the crosspoints, the signals are sent to a 4 x 1 Mux, which for-
wards the signals to a buffer before sending the signals to backplane I/O connectors for distribution.
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