Grass-valley 8937 v.1.1.0 User Manual download pdf (Page 43)

8937/8937D — Instruction Manual 43

Functional Description

Input and Output Processing

The input section(s) receive SD (standard definition) video from the rear

input BNCs and send it to signal equalizing and reclocking circuits. The

input section can also bypass reclocking circuits to the output amplifiers.

The output amplifiers drive eight equal-phase outputs on the rear back

plane for the 8937 and one set of four outputs and one set of three outputs

for the 8937D.

Note All outputs are in phase with the input signal.

Microprocessor and Input Selector

The primary purpose of the microprocessor is to provide remote control

and monitoring capability for the module. It receives signal present, signal

lock, and speed detection signals from the equalizer and reclocker circuits.

Using this information, local jumper settings, and remote control com

mands, the microprocessor selects the internal signal path and gives feed-

back through the LEDs and remote control bus.

User-enabled video presence detection generates individual SNMP traps

for each channel that can be sent to an SNMP manager via the micropro-

cessor

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Grass-valley 8937 v.1.1.0 User Manual Page 43