Robert Schlabbach: > Is it possible that the "distortions" you are seeing are _not_ the result > of reception errors, but rather the result of incorrect DMA transfers from > the SAA7146A to the PCI bus? If you have no issues with QAM64 channels, > that might only be due to their lower data rate. All my channels are QAM64. > You should make sure the register bit which makes the TDA10021 set the TEI > bit in any packets incorrectly received, and then dump and examine the raw > MPEG-2 transport from from an QAM128 channel. If you have TEI errors and > continuity errors in there, it's a reception problem. However, if you > _only_ have continuity counter errors in there, it's a DMA error. I've gotten around to play with dvbsnoop. And indeed, Transport_error_indicator remains 0 all the time, while the continuity counters seem to indicate lots of lost ts-packets for the garbled channels. Is there any way of rectifying this or reasearch where they are lost? For a bad channel: $ grep continuity_counter bad-a.snoop | head -10 continuity_counter: 5 (0x05) continuity_counter: 6 (0x06) continuity_counter: 9 (0x09) continuity_counter: 12 (0x0c) continuity_counter: 13 (0x0d) continuity_counter: 14 (0x0e) continuity_counter: 12 (0x0c) continuity_counter: 1 (0x01) continuity_counter: 2 (0x02) continuity_counter: 3 (0x03) For a good channel: $ grep continuity_counter good-a.snoop | head -10 continuity_counter: 14 (0x0e) continuity_counter: 15 (0x0f) continuity_counter: 0 (0x00) continuity_counter: 1 (0x01) continuity_counter: 2 (0x02) continuity_counter: 3 (0x03) continuity_counter: 5 (0x05) continuity_counter: 4 (0x04) continuity_counter: 5 (0x05) continuity_counter: 6 (0x06)
