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6.14 QAM/VSB/RF (VB260 or VB262 Module Option for VB220)
For the VB220 the QAM, VSB or RF tab will only be present in the graphical user
interface provided that the probe chassis is equipped with an optional QAM (VB260) or
QAM/VSB (VB262) demodulator module. For the VB262 option module one input is
active by default and the second input can be activated through the SECOND-RF-
INPUT-OPTION license key. There can be up to two VB262 modules per chassis.
If two or more demodulator inputs are present in the chassis they will be labelled
according to the pattern QAM1, QAM2 etc., QAM1 being the leftmost, as seen from the
front of the unit. For VB262 demodulators the tab name is user selectable (in the
Setup - ETR
view).
Thumbnails of QAM services are accessed from the
ETR 290 - Services
view.
6.14.1 QAM - Status
(Constellation diagram requires the Advanced RF option)
The
QAM - Status
view gives an overview of the key input interface parameters.
For the VB262 demodulator it is possible to zoom into the constellation diagram by
clicking on it.
The QAM status view displays the following information:
QAM status - Stream info:
Packet length:
Indicates if the transport stream packets are 188 or 204
bytes
Original network
ID:
The original network ID as specified in the NIT table
Network ID:
The network ID as specified in the NIT table
Transport stream
The transport stream ID as specified in the PAT table
PROBE USERS' MANUAL VERSION 5.0
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