Web GUI Monitoring & Control
Figure 4.28: Stream Isolation – Output 1 Enabled
The status of the MODCOD filter now shows that only two MODCOD are allowed, as shown by
the green wording ‘Not filtered’. Base-band frames arriving at the demodulator on all other
MODCOD bearers will be discarded.
Examination of the status of the ISI assignment shows that base-band frames arriving in QPSK rate
8/9 PL frames will be associated with an ISI of 2, and base-band frames arriving in 16APSK rate 2/3
PL frames will be associated with an ISI of 1. The received ISI values will be ignored.
4.9.2.3
Manual Mode
Relying on automatic configuration makes the stream isolation function easier to use, but there
are circumstances which may require more advanced tactics. For example, one stream may be
borne by a discrete subset of MODCOD values, using an adaptive scheme. For situations such as
this, manual configuration is possible.
The mode of operation may be changed to manual by opening the ‘Behaviour’ pull-down
menu and selecting ‘manual’. A window, similar to the one shown in Figure 4.29 is displayed.
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SBD75e Series Demodulator Installation and Operation Manual
