Input Type; Redundant Input; Pls Seed; Acm - Advantech L-Band Satellite Modulator Installation And Operation Manual

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Input Type

4.7.3
The input is selected from off, PRBS, ASI1,...,ASIX where X is the number of ASI inputs for the
modulator. If PRBS is selected then a Pseudo Random Bit Stream will be generated, if the input
type is normal then this pattern will be MPEG framed and transmitted as a Transport Stream. If
unframed is selected then it will be transmitted as Generic Stream Continuous.

Redundant Input

4.7.4
The input is selected from off, PRBS, ASI1,...,ASIX where X is the number of ASI inputs for the
modulator. If the main input is removed then the unit will switch to the redundant input, which will
cause an alarm to be raised. When the main input is restored the unit will continue to use the
redundant input until the modulator is reconfigured.

PLS Seed

4.7.5
The DVB-S2 physical layer specification makes provision for the application of user specific
physical layer scrambling.
To apply user specific physical layer scrambling:
1. Enter the appropriate value in the PLS Seed Text box on the advanced window. The value of
the seed entered must match the value of the seed employed at the corresponding
modulator.

ACM

4.7.6
When the FEC is set to either "DVBS2 64K ACM" or "DVBS2 16K ACM" then the following is
displayed in Figure 4.12.
Figure 4.12: ACM Configuration Window
There is now a tab for each stream which can be independently configured without affecting
other streams. For each stream can have independent code rate, modulation and pilots but it is
worth noting that most DVB-S2 ACM/VCM receivers highly recommend the use of pilots.
Once a stream has been configured then press configure stream, this will only affect the stream
in question, all other streams will be unaffected.
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SBM75e Series Modulator Installation and Operation Manual