[linux-dvb] Re: AverTV DVB-T un-viewable QAM_64 channels (QAM_16work perfectly) ...massive noise

[Rick Hamnett <rick@packetoverdose.com>]

Uhhh sorry i dont know what happened there?! The mail was supposed to 
read.....

im sending this in html in the hope it displays.....................


Hi, this is what i did to specifiy the tuning params i used in my 
previous email

The scan made the output
ITV 
News:834166670:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_1_2:QAM_64:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:2850:2851:8588 

And so i ran

gentoo dvbtune-0.5 # ./dvbtune -f834166670 -p2850 -a2851 -qam64 -gi32 
-tm2 -bw8 -cr2_3 -m
Signal=65535, Verror=959, SNR=32711dB, BlockErrors=0, (S|L|C|V|SY|)
Signal=65535, Verror=26, SNR=37481dB, BlockErrors=0, (S|L|C|V|SY|)
Signal=65535, Verror=44, SNR=37241dB, BlockErrors=0, (S|L|C|V|SY|)
Signal=65535, Verror=36, SNR=37433dB, BlockErrors=0, (S|L|C|V|SY|)
Signal=65535, Verror=21, SNR=37817dB, BlockErrors=0, (S|L|C|V|SY|)
Signal=65535, Verror=20, SNR=35992dB, BlockErrors=0, (S|L|C|V|SY|)
Signal=65535, Verror=37, SNR=36552dB, BlockErrors=0, (S|L|C|V|SY|)


Ive also tried to # tzap "ITV News" and i get lock as follows

gentoo dvbtune-0.5 # tzap "ITV News"
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 834166670 Hz
status 01 | signal ffff | snr 8198 | ber ffffffff | unc ffffffff |
status 1f | signal ffff | snr 84e8 | ber 0003ffe9 | unc ffffffff | 
FE_HAS_LOCK
status 1f | signal ffff | snr 7657 | ber 00000362 | unc ffffffff | 
FE_HAS_LOCK
status 1f | signal ffff | snr 8ca8 | ber 00000e4a | unc 00000000 | 
FE_HAS_LOCK
status 1f | signal ffff | snr 6226 | ber 0000057c | unc 00000040 | 
FE_HAS_LOCK
status 1f | signal ffff | snr 6f46 | ber 0000082d | unc 00000000 | 
FE_HAS_LOCK
status 1f | signal ffff | snr 6b56 | ber 000014bf | unc 00000000 | 
FE_HAS_LOCK
status 1f | signal ffff | snr 6156 | ber 000002ff | unc 00000000 | 
FE_HAS_LOCK
status 1f | signal ffff | snr 8aa8 | ber 0000129d | unc ffffffff | 
FE_HAS_LOCK
status 1f | signal ffff | snr 89e8 | ber 00000399 | unc 00000000 | 
FE_HAS_LOCK

And then if i try to stream it with dvbstream


gentoo store # dvbstream -f834166670 -v2850 -a2851 -qam64 -gi1_32 -cr2_3 
-bw8 -tm2 -o
dvbstream v0.6 - (C) Dave Chapman 2001-2004
Released under the GPL.
Latest version available from http://www.linuxstb.org/
dvbstream will stop after -1 seconds (71582788 minutes)
Setting filter for PID 0
Output to stdout
Streaming 1 stream
<then i get the mpeg data streaming to stdout>

But i have noticed something very wierd, when i pipe it into 
mplayer..... if i did a normal qam16 channel the cache would fill up in 
maybe 2-3 seconds...but if i try this channel it takes 30 seconds to 
even get to 1%

And i can actually watch the stdout output and its slow enough to read 
evey line..... and one more thing......there is a repeating part of data 
that i see almost every time it outputs ... see link below (i had to put 
the data on my pastecode service because the encoding was screwing up 
the email when i sent it to the list ... please check it out its wierd)

http://www.packetoverdose.com/paste/?show=70

Rick


--
Info:
To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe linux-dvb" as subject.