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TBS6909X DVB-S2 bit error rate

TBS6909X DVB-S2 bit error rate

Postby cybernet » Wed Mar 18, 2020 2:01 am

Hi,

We are facing to bad reception from the card.

config:
Fresh Ubuntu 18.04
kernel 5.3.0-42-generic
Latest build of tbs driver from git.

Antenna 1.1m on 5W TP 12648 MIS id 3
Signal level:
dvb-fe-tool -a 6 --femon -c1
Lock (0x1f) Signal= -30,82dBm C/N= 14,10dB
Layer A: Signal= 70,07% C/N= 70,57%

We have artefact every 5-10 secs.

card 6909x changed?
tested with DVBlast and MuMuDVB, same issue...

confirmed at ffmpeg encoding output console:

[h264 @ 0x3655180] left block unavailable for requested intra4x4 mode -1
[h264 @ 0x3655180] error while decoding MB 0 24, bytestream 25234
[h264 @ 0x3655180] concealing 589 DC, 589 AC, 589 MV errors in I frame
[eac3 @ 0x35b3980] exponent -1 is out-of-range
[eac3 @ 0x35b3980] error decoding the audio block
Error while decoding stream #0:1: Error number -16976906 occurred
[h264 @ 0x390b500] Reference 2 >= 2ze= 50913kB time=00:06:10.00 bitrate=1127.3kbits/s speed=1.01x
[h264 @ 0x390b500] error while decoding MB 20 6, bytestream 10661
[h264 @ 0x390b500] concealing 1379 DC, 1379 AC, 1379 MV errors in P framemake_clickable_callback(MAGIC_URL_FULL, '
', 'udp://@239.100.6.5:4422:', '', ' class="postlink"') corrupt decoded frame in stream 06:10.64 bitrate=1127.3kbits/s speed=1.01x
[mpegts @ 0x3593940] PES packet size mismatch1kB time=00:06:12.18 bitrate=1127.6kbits/s speed=1.01x
[eac3 @ 0x35b3980] GAQ gain group code out-of-range
Last message repeated 1 times
[eac3 @ 0x35b3980] invalid spectral extension range (9 >= 9)
[eac3 @ 0x35b3980] error decoding the audio block
Error while decoding stream #0:1: Error number -16976906 occurred
[h264 @ 0x390b500] left block unavailable for requested intra4x4 mode -1
[h264 @ 0x390b500] error while decoding MB 0 24, bytestream 20504
[h264 @ 0x390b500] concealing 589 DC, 589 AC, 589 MV errors in I framemake_clickable_callback(MAGIC_URL_FULL, '
', 'udp://@239.100.6.5:4422:', '', ' class="postlink"') corrupt decoded frame in stream 06:15.00 bitrate=1122.1kbits/s speed=1.02x
[h264 @ 0x36fb180] Reference 3 >= 2ze= 53224kB time=00:06:25.51 bitrate=1131.0kbits/s speed=1.01x
[h264 @ 0x36fb180] error while decoding MB 34 20, bytestream 1846
[h264 @ 0x36fb180] concealing 735 DC, 735 AC, 735 MV errors in B frame
[mpegts @ 0x3593940] PES packet size mismatch
[eac3 @ 0x35b3980] invalid spectral extension range (9 >= 9)
[eac3 @ 0x35b3980] error decoding the audio block
Error while decoding stream #0:1: Error number -16976906 occurredmake_clickable_callback(MAGIC_URL_FULL, '
', 'udp://@239.100.6.5:4422:', '', ' class="postlink"') corrupt decoded frame in stream 06:26.08 bitrate=1130.3kbits/s speed=1.01x
[h264 @ 0x390b500] left block unavailable for requested intra4x4 mode -1e=1124.5kbits/s speed=1.02x
[h264 @ 0x390b500] error while decoding MB 0 20, bytestream 25181
[h264 @ 0x390b500] concealing 769 DC, 769 AC, 769 MV errors in I framemake_clickable_callback(MAGIC_URL_FULL, '
', 'udp://@239.100.6.5:4422:', '', ' class="postlink"') corrupt decoded frame in stream 0
[h264 @ 0x35deec0] mmco: unref short failure58kB time=00:06:35.00 bitrate=1125.3kbits/s speed=1.01x
[h264 @ 0x3664340] mmco: unref short failure30kB time=00:06:35.00 bitrate=1126.8kbits/s speed=1.01x
[h264 @ 0x3669500] left block unavailable for requested intra4x4 mode -1e=1129.3kbits/s speed=1.01x
[h264 @ 0x3669500] error while decoding MB 0 16, bytestream 17252
[h264 @ 0x3669500] concealing 949 DC, 949 AC, 949 MV errors in I framemake_clickable_callback(MAGIC_URL_FULL, '
', 'udp://@239.100.6.5:4422:', '', ' class="postlink"') corrupt decoded frame in stream 07:00.00 bitrate=1122.2kbits/s speed=1.02x
[h264 @ 0x3927cc0] concealing 803 DC, 803 AC, 803 MV errors in B frameate=1132.2kbits/s speed=1.01x
[h264 @ 0x3664340] concealing 260 DC, 260 AC, 260 MV errors in B frameate=1125.6kbits/s speed=1.02xmake_clickable_callback(MAGIC_URL_FULL, '
', 'udp://@239.100.6.5:4422:', '', ' class="postlink"') corrupt decoded frame in stream 07:10.00 bitrate=1126.3kbits/s speed=1.01x
Last message repeated 1 times
[h264 @ 0x3ace7c0] left block unavailable for requested intra4x4 mode -1e=1133.4kbits/s speed=1.01x
[h264 @ 0x3ace7c0] error while decoding MB 0 18, bytestream 36410
[h264 @ 0x3ace7c0] concealing 859 DC, 859 AC, 859 MV errors in I frame
[h264 @ 0x3655180] Reference 2 >= 2ze= 59625kB time=00:07:10.89 bitrate=1133.6kbits/s speed=1.01x

It is append when bit error rate coming:

Info: DVB: Bit error rate: 364 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 364 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46576 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 47232 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 1 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46576 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 311 Signal strength: 45920 SNR: 47232 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 129 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 129 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0
Info: DVB: ts_discontinuities 0
Info: DVB: Bit error rate: 0 Signal strength: 45920 SNR: 46904 Uncorrected blocks: 0


The only think we have seen, that we have this bit error rate on transponder using modulation 8psk and ACM/VCM, 8psk only works without bit error rate.

So somebody have a idea where to look ?

thanks

Armand
cybernet
 
Posts: 4
Joined: Tue Apr 09, 2019 3:37 am

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