Re: no locking on dvb-s2 22000 2/3 8PSK transponder on Astra 19.2E with tt s2-3200

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On Wed, 9 Dec 2009, Newsy Paper wrote:

> no matter if I use Igors or Manus driver, there's no lock on 11303 h 22000 2/3 8psk. Other users at vdr-portal report same problem.
> 
> The strange thing is that all other transponders that use 22000 2/3 8psk do work but this transponder doesn't. It worked fine until december 3rd when uplink moved to Vienna. I think they changed a parameter like rolloff or inversion and the dvb-s2 part of stb6100 is buggy.

Oh jeez, non-wrapping mail...  Anyway, without bothering to see
what I'm replying to, here's the value I get from parsing the
NIT table today:

                  Frequency: 18023029 (=  11.30275 GHz)
                  Orbital_position: 402 (=  19.2)
                  West_East_flag: 1 (0x01)  [= EAST]
                  Polarisation: 0 (0x00)  [= linear - horizontal]
                  Kind: 1 (0x01)  [= DVB-S2]
                  Roll Off Faktor: 0 (0x00)  [= Alpha 0.35]
                  Modulation_type: 2 (0x02)  [= 8PSK]
                  Symbol_rate: 2228224 (=  22.0000)
                  FEC_inner: 2 (0x02)  [= 2/3 conv. code rate]



Now, I get the following for a different transponder, with a
different roll-off:

                  Frequency: 17920117 (=  11.17075 GHz)
                  Orbital_position: 402 (=  19.2)
                  West_East_flag: 1 (0x01)  [= EAST]
                  Polarisation: 0 (0x00)  [= linear - horizontal]
                  Kind: 1 (0x01)  [= DVB-S2]
                  Roll Off Faktor: 1 (0x01)  [= Alpha 0.25]
                  Modulation_type: 2 (0x02)  [= 8PSK]
                  Symbol_rate: 2228224 (=  22.0000)
                  FEC_inner: 2 (0x02)  [= 2/3 conv. code rate]


But at the same time I see the same roll-off reported on all
but the 0,25 transponder within the limited NIT table I
nabbed, regardless of 9/10 FEC or 2/3+22000.

I don't know if the above NIT data is 100% accurate, or if
it reflects a change from what it was before.  Actually, I
don't know if I'm parsing everything, because I vaguely
recall there are other selectable options on a real receiver
(which I've never had in front of me) pertaining to pilot
on or off, which apparently affect tuning ability.


barry bouwsma
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