Re: [Discuss-gnuradio] gr-dtv | DVB-S2X Compatibility test

[Ron Economos]

Thanx for testing with the RX8200. I believe the two failures are not 
valid modcod's.

DVB-S2X 8PSK 26/45 only exists for short frames (which it seems the 
RX8200 does not support). In the Python script, there should be even 
more checking with regards to short/normal frames.

DVB-S2X 16APSK 7/9 is a little more tricky. There's actually two 
different LDPC tables for 7/9 and 140/180 even though it's the same 
rate. So the modcod is really 16APSK 140/180. To avoid confusion, you 
should use the "Implementation modcod name" in table 17a of the DVB-S2X 
specification rather than the "Canonical modcod name"

Ron

On 10/25/2017 11:48 AM, Kai-Uwe Storek wrote:
> Hey Ron,
>
> I tested the "standard-compliance" of the dvb-s2 blocks (DVB-S2X
> modcods) of gnuradio by the help of an RX8200 up to 32APSK. Here are
> the results. :-)
>
> Symbol rate: 5M
> Roll-off: 0.2
>
> No sync possible for:
>
> DVB-S2X 8PSK 26/45
> DVB-S2X 16APSK 7/9
>
> Sync / TS lock:
>
> DVB-S2X QPSK 9/20
> DVB-S2X QPSK 11/20
> DVB-S2X QPSK 13/45
>
> DVB-S2X 8PSK 13/18
> DVB-S2X 8PSK 23/36
> DVB-S2X 8PSK 25/36
>
> DVB-S2X 8APSK-L 5/9 (100/180)
> DVB-S2X 8APSK-L 26/45 (104/180)
>
> DVB-S2X 16APSK 3/5
> DVB-S2X 16APSK 13/18
> DVB-S2X 16APSK 23/36
> DVB-S2X 16APSK 25/36
> DVB-S2X 16APSK 26/45
> DVB-S2X 16APSK 28/45
>
> DVB-S2X 16APSK-L 1/2 (MOD_8_8APSK / C90_180)
> DVB-S2X 16APSK-L 2/3 (MOD_8_8APSK / C20_30)
> DVB-S2X 16APSK-L 3/5 (MOD_8_8APSK / C18_30)
> DVB-S2X 16APSK-L 5/9 (MOD_8_8APSK / C100_180)
> DVB-S2X 16APSK-L 8/15 (MOD_8_8APSK / C96_180)
>
> DVB-S2X 32APSK 2/3 (MOD_4_12_16APSK)
> DVB-S2X 32APSK 7/9 (MOD_4_8_4_16APSK / C140_180)
> DVB-S2X 32APSK 11/15 (MOD_4_8_4_16APSK / C132_180)
> DVB-S2X 32APSK 32/45 (MOD_4_8_4_16APSK / C128_180)
> DVB-S2X 32APSK-L 2/3 (MOD_4_12_16APSK)
>
> Not implemented:
>
> DVB-S2X QPSK 4/15
> DVB-S2X QPSK 7/15
> DVB-S2X QPSK 8/15
> DVB-S2X QPSK 11/45
> DVB-S2X QPSK 14/45
> DVB-S2X QPSK 32/45
>
> DVB-S2X 8PSK 7/15
> DVB-S2X 8PSK 8/15
> DVB-S2X 8PSK 32/45
>
> DVB-S2X 16APSK 7/15
> DVB-S2X 16APSK 8/15
> DVB-S2X 16APSK 32/45
> DVB-S2X 16APSK 77/90