Hi, But I noticed the UNC is not zero compared to the result in your first mail. As far as I know, BER is high but UNC is zero, the signal should be better than BER is low but UNC is NOT zero. Am I right ? Best regards, Lo Chun Chung (Chung) ECE-DHT@ASTRI HK. -----Original Message----- From: linux-dvb-bounces@xxxxxxxxxxx [mailto:linux-dvb-bounces@xxxxxxxxxxx] On Behalf Of Dan Harper Sent: Monday, 24 September, 2007 12:07 PM To: linux-dvb Subject: Re: tzap output concerns Ah, it looks as though it's a bug in the Nova T 500 drivers. To create the problem initially, I had turned down the amplifier on my antenna and then turned it up again. I was then getting the poor results posted previously. I have now booted the machine from a cold state and got the following results: beastie:~# tzap -a 0 "ABC TV Melbourne" using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' tuning to 226500000 Hz video pid 0x0200, audio pid 0x028a status 07 | signal 8cd6 | snr 0000 | ber 001fffff | unc 00000022 | status 1f | signal 8d1e | snr 0000 | ber 00000b90 | unc 00000038 | FE_HAS_LOCK status 1f | signal 8d06 | snr 0000 | ber 00000670 | unc 0000002f | FE_HAS_LOCK status 1f | signal 8d14 | snr 0000 | ber 00000100 | unc 0000002f | FE_HAS_LOCK status 1f | signal 8d12 | snr 0000 | ber 00005af0 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8d1a | snr 0000 | ber 000005d0 | unc 00000108 | FE_HAS_LOCK status 1f | signal 8d1d | snr 0000 | ber 00000310 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8d1e | snr 0000 | ber 000005f0 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8d77 | snr 0000 | ber 00000160 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8d0f | snr 0000 | ber 00000aa0 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8d4b | snr 0000 | ber 00000650 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8d18 | snr 0000 | ber 000004b0 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8d51 | snr 0000 | ber 00000630 | unc 00000028 | FE_HAS_LOCK beastie:~# tzap -a 1 "ABC TV Melbourne" using '/dev/dvb/adapter1/frontend0' and '/dev/dvb/adapter1/demux0' tuning to 226500000 Hz video pid 0x0200, audio pid 0x028a status 0b | signal 8fb5 | snr 0000 | ber 001fffff | unc 0000034c | status 1f | signal 8f7f | snr 0000 | ber 000051a0 | unc 000008ad | FE_HAS_LOCK status 1f | signal 8f7a | snr 0000 | ber 00000360 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8f99 | snr 0000 | ber 00000170 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8f9e | snr 0000 | ber 000008f0 | unc 00000002 | FE_HAS_LOCK status 1f | signal 8f81 | snr 0000 | ber 000000e0 | unc 00000008 | FE_HAS_LOCK status 1f | signal 8f92 | snr 0000 | ber 00002700 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8fac | snr 0000 | ber 0002cab0 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8fb7 | snr 0000 | ber 00000030 | unc 00000213 | FE_HAS_LOCK status 1f | signal 8f97 | snr 0000 | ber 00000120 | unc 00000068 | FE_HAS_LOCK status 1f | signal 8f65 | snr 0000 | ber 00000130 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8f5f | snr 0000 | ber 00000000 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8f94 | snr 0000 | ber 000000f0 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8fb8 | snr 0000 | ber 00000000 | unc 00000000 | FE_HAS_LOCK status 1f | signal 8fa0 | snr 0000 | ber 00000000 | unc 00000000 | FE_HAS_LOCK Not great, but better. Hopefully this gives some more information for the developers to track down the bugs in the driver. I'll try and figure out how to get this into the bug tracker. Cheers, Dan On 24/09/2007, at 12:33 PM, Dan Harper wrote: > > On 24/09/2007, at 12:22 PM, Manu Abraham wrote: >> >> Please don't bother much about these statistics. These are a bit >> useless in most cases, ie it does vary driver to driver how it is >> implemented. > > Thanks Manu, but I still have concerns because after Googling, I > notice that my results are not in line with other Nova T 500 users. > Actually the SNR is the same, but the BER and UNC is a cause for > concern. > > Dan > > _______________________________________________ > linux-dvb mailing list > linux-dvb@xxxxxxxxxxx > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This message (including any attachments) is for the named addressee(s)'s use only. It may contain sensitive, confidential, private proprietary or legally privileged information intended for a specific individual and purpose, and is protected by law. 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