4.7.6 The VB262 Dual QAM/8VSB Demodulator Module (VB220 Option)
The VB262 QAM/8VSB demodulator is an optional input interface module. It has two RF
inputs; one or two of these are enabled according to probe licensing.
The connectors are:
QAM/VSB 1: RF input – 75 ohm F-connector
QAM/VSB 2: RF input – 75 ohm F-connector
GPI: Alarm relay output – 9 PIN D-sub male
GPI – Pinout of alarm relay output (to be implemented)
Normal operation Alarm/Power off
Pins 6-7: Contacts closed Pins 6-7: No connection
Pins 7-8: No connection Pins 7-8: Contacts closed
Pin 5: Gnd Pin 5: Gnd
Two LEDs indicate whether the demodulators lock to the incoming RF signals or not.
PROBE USERS' MANUAL VERSION 5.0
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