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Roll-off

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I was playing around with my Prof7500, TBS6925, and TBS6983 today, both direct with TSREADER and to TSREADER via Crazyscan.  In each case, I was tuning the AMC-21 12180V30000 PBS mux.

Going direct to TSREADER:
1) TBS 6925 with TBS TSREADER source doesn't have a roll-off setting
2) TBS 6983 with TBS TSREADER source won't allow selecting .20 or .25 but .35 works.
3) TBS 6925 with Streamreader TSREADER proxy source works with .20,  or .25  or .35
4) TBS 6983 with Streamreader TSREADER proxy source works with .20,  or .25  or .35
5) PROF7500 with Streamreader TSREADER proxy source works with .20,  or .25  or .35

6) Tuning the transponder with Crazyscan shows that the roll-off is 0.20. 

3, 4, and 5 make it seem like TSREADER doesn't have the capability of setting the RO on these cards.  This is not unusual in cases where the cards ignore settings and automatically find the lock parameters.
2 makes it seem like this transponder actually has a RO of 0.35.
6 makes it seem like this transponder actually has a RO of 0.20.

From reading, with DVB-S2, either of the 3 RO factors can be used, and 0.2 is more efficient, but 0.35 has less signal degradation.

Anyway, I'm curious re whether this transponder is 0.2, which means that there is probably a bug in either TSREADER or it's TBS source, or if the transponder is .35, which means there is either a bug in Crazyscan or that Crazyscan just assumes that all DVB-S2 has a .2 roll-off.

 

Forum: Computer and USB Satellite Receivers and Recording


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