Grass Valley 8937 v.1.0.0 - Manual (Page 30)

30 8937/8937D Instruction Manual
Functional Description
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.