[linux-dvb] Poorly Siemens DVB-C

Gavin Hamill gdh at acentral.co.uk
Sun Aug 7 01:46:57 CEST 2005


I have one of these classic cards (yay! RGB output! :) and the tuning has 
suddenly got VERY slow - it'll take easily a minute to lock onto most 
signals, and often up to four minutes. (!)

I've already been through the PWM adjustment and will usually end up with 
"ves1820: AFC (0) 0Hz" or "ves1820: AFC (-1) 6789Hz" so I know the PWM value 
is set as accurately as it can be... unfortunately I am having to load 
dvb-core with dvb_override_tune_delay=20000 

czap testy
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
  6 testy:595000000:INVERSION_AUTO:6952000:FEC_AUTO:QAM_64:640:641
  6 testy: f 595000000, s 6952000, i 2, fec 9, qam 3, v 0x280, a 0x281
status 00 | signal 8080 | snr b6b6 | ber 00029220 | unc 0000001f |
status 00 | signal ffff | snr b6b6 | ber 00029220 | unc ffffffff |
status 00 | signal ffff | snr b6b6 | ber 00029220 | unc ffffffff |
status 00 | signal ffff | snr b5b5 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b7b7 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b6b6 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b6b6 | ber 009ffff6 | unc ffffffff |
status 06 | signal ffff | snr b5b5 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b5b5 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b5b5 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b3b3 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b6b6 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b3b3 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b5b5 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b2b2 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b1b1 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b4b4 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b1b1 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b3b3 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b6b6 | ber 009ffff6 | unc ffffffff |
status 00 | signal 9c9c | snr b9b9 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b8b8 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b6b6 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b8b8 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b6b6 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b4b4 | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b5b5 | ber 009ffff6 | unc ffffffff |
status 06 | signal ffff | snr bbbb | ber 009ffff6 | unc ffffffff |
status 00 | signal ffff | snr b8b8 | ber 009ffff6 | unc ffffffff |
status 06 | signal ffff | snr bcbc | ber 009ffff6 | unc ffffffff |
status 1e | signal ffff | snr baba | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 00 | signal ffff | snr baba | ber 009ffff6 | unc ffffffff |
status 1e | signal ffff | snr c0c0 | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr bdbd | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr b6b6 | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 06 | signal ffff | snr c0c0 | ber 009ffff6 | unc ffffffff |
status 1f | signal ffff | snr baba | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr bebe | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr c4c4 | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1e | signal ffff | snr c6c6 | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr c5c5 | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr c9c9 | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr caca | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr cbcb | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr cdcd | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr c6c6 | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr cccc | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr cbcb | ber 009ffff6 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr d1d1 | ber 008c4c18 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr dfdf | ber 008c4c18 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr d9d9 | ber 00265264 | unc ffffffff | FE_HAS_LOCK
status 1f | signal ffff | snr d7d7 | ber 00265264 | unc 0000003a | FE_HAS_LOCK
status 1f | signal ffff | snr d3d3 | ber 000db966 | unc 00000015 | FE_HAS_LOCK
status 1f | signal ffff | snr dada | ber 000db966 | unc 00000008 | FE_HAS_LOCK
status 1f | signal ffff | snr e2e2 | ber 000db966 | unc 00000000 | FE_HAS_LOCK
status 1f | signal ffff | snr e4e4 | ber 00056496 | unc 00000001 | FE_HAS_LOCK
status 1f | signal ffff | snr e0e0 | ber 00056496 | unc 00000000 | FE_HAS_LOCK
status 1f | signal ffff | snr e8e8 | ber 00023744 | unc 00000000 | FE_HAS_LOCK
status 1f | signal ffff | snr d9d9 | ber 00023744 | unc 00000000 | FE_HAS_LOCK

the 'signal 8080' gradually creeps up (you can see it at 9c9c after the 
20-second tuning delay) .. is there anything I can twiddle to speed up / help 
sort out the tuning on this elderly beast? 

tip: don't buy these things 2nd hand on eBay :(

Cheers,
Gavin.




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