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8.4.5
QAM
O
UTPUT
M
ODULE
Unlike other modules, the QAM module’s
Port Settings
tab is not modifiable as the parameter values are set
under
Outputs
→
QAM
→
Device setup.
Although the QAM output has two physical outputs, it carries up to sixteen transport streams. Internally these
streams are modulated by four block QAM modulators each carrying up to four channels.
The RF connectors on the output are configured as such: the first two block modulators A and B, output on the
port marked as
A+B
, the last two block modulators C and D output on the port marked as
C+D
.
The configuration of the QAM modulator parameters is available in a separate node in the
Navigation Pane
,
called
Device Setup
, which is beneath each QAM output node.
The QAM module supports the ITU-T J.183/JCTEA standard where output several transport streams can be
multiplexed into one transport stream using Time Division Multiplexing (TDM). Currently, this standard is
supported for transparent streams only. To enable J.183/JCTEA support, simply click the corresponding check
box.
