The VB252 COFDM demodulator is an optional input interface module. It supports DVB-T and DVB-T2.
It has two RF inputs; one or two of these are enabled according to probe licensing.
The connectors are:
RF IN: RF input – 75 ohm F-connector
1PPS IN: 1PPS reference clock input – 50 ohm BNC female
GPI: Alarm relay output – 9 PIN D-sub male
An LED indicates whether the demodulator locks to the incoming RF signal or not.
You can optionally use the 1PPS input on the controlling VB220 probe instead of on the COFDM module.
4.8.4 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
Two LEDs indicate whether the demodulators lock to the incoming RF signals or not.
VB2xx GigE User’s Manual version 5.4 27
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