From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-ww0-f44.google.com ([74.125.82.44]:43405 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753300Ab0JBPTc (ORCPT ); Sat, 2 Oct 2010 11:19:32 -0400 Received: by wwj40 with SMTP id 40so2509914wwj.1 for ; Sat, 02 Oct 2010 08:19:31 -0700 (PDT) Message-ID: <4CA74D80.7000707@gmail.com> Date: Sat, 02 Oct 2010 17:19:28 +0200 From: thomas schorpp Reply-To: thomas.schorpp@gmail.com MIME-Version: 1.0 To: linux-media@vger.kernel.org Subject: Re: dvb-c: TT C-1501: tda827x.c: Cannot hold lock at 746 MHz References: <4CA74509.6000404@gmail.com> In-Reply-To: <4CA74509.6000404@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit List-ID: Sender: Am 02.10.2010 16:43, schrieb thomas schorpp: > Hello, > > Klaas patch is not complete: > http://article.gmane.org/gmane.linux.drivers.dvb/47571 > > I found a hole at 746MHz with 2.6.34.0 kernel and DE provider kabelbw.de, > Picture fragments and audio bursts only: > > Oct 2 15:53:03 tom1 vdr: [16380] receiver on device 1 thread ended (pid=16268, tid=16380) > Oct 2 15:53:03 tom1 kernel: tda827x: tda827xa_set_params: > Oct 2 15:53:03 tom1 kernel: tda827x: tda827xa_set_params select tda827xa_dvbc > Oct 2 15:53:03 tom1 kernel: tda827x: tda8275a AGC2 gain is: 4 > Oct 2 15:53:04 tom1 vdr: [16462] setting audio track to 1 (0) > Oct 2 15:53:04 tom1 kernel: tda827x: tda827xa_set_params: > Oct 2 15:53:04 tom1 kernel: tda827x: tda827xa_set_params select tda827xa_dvbc > Oct 2 15:53:04 tom1 kernel: tda827x: tda8275a AGC2 gain is: 5 > Oct 2 15:53:04 tom1 vdr: [16279] frontend 0 lost lock on channel 496, tp 746 > Oct 2 15:53:04 tom1 vdr: [16279] frontend 0 regained lock on channel 496, tp 746 > Oct 2 15:53:05 tom1 kernel: tda827x: tda827xa_set_params: > Oct 2 15:53:05 tom1 kernel: tda827x: tda827xa_set_params select tda827xa_dvbc > Oct 2 15:53:05 tom1 kernel: tda827x: tda8275a AGC2 gain is: 4 > Oct 2 15:53:05 tom1 vdr: [16279] frontend 0 lost lock on channel 496, tp 746 > Oct 2 15:53:05 tom1 kernel: tda827x: tda827xa_set_params: > Oct 2 15:53:05 tom1 kernel: tda827x: tda827xa_set_params select tda827xa_dvbc > Oct 2 15:53:05 tom1 kernel: tda827x: tda8275a AGC2 gain is: 4 > Oct 2 15:53:05 tom1 kernel: tda827x: tda827xa_set_params: > Oct 2 15:53:05 tom1 kernel: tda827x: tda827xa_set_params select tda827xa_dvbc > Oct 2 15:53:05 tom1 kernel: tda827x: tda8275a AGC2 gain is: 5 > Oct 2 15:53:06 tom1 vdr: [16279] frontend 0 regained lock on channel 496, tp 746 > Oct 2 15:53:06 tom1 kernel: tda827x: tda827xa_set_params: > Oct 2 15:53:06 tom1 kernel: tda827x: tda827xa_set_params select tda827xa_dvbc > Oct 2 15:53:06 tom1 kernel: tda827x: tda8275a AGC2 gain is: 5 > Oct 2 15:53:06 tom1 kernel: tda827x: tda827xa_set_params: > Oct 2 15:53:06 tom1 kernel: tda827x: tda827xa_set_params select tda827xa_dvbc > Oct 2 15:53:06 tom1 kernel: tda827x: tda8275a AGC2 gain is: 5 > Oct 2 15:53:06 tom1 kernel: tda827x: tda827xa_set_params: > Oct 2 15:53:06 tom1 kernel: tda827x: tda827xa_set_params select tda827xa_dvbc > Oct 2 15:53:06 tom1 kernel: tda827x: tda8275a AGC2 gain is: 4 > Oct 2 15:53:06 tom1 vdr: [16268] switching to channel 494 > > cycle: 78 d_time: 0.004 s Sig: 51657 SNR: 43690 BER: 1728 UBLK: 55 Stat: 0x00 [] > cycle: 79 d_time: 0.004 s Sig: 52428 SNR: 60395 BER: 1728 UBLK: 57 Stat: 0x03 [SIG CARR ] > cycle: 80 d_time: 0.004 s Sig: 50886 SNR: 46517 BER: 1728 UBLK: 95 Stat: 0x00 [] > cycle: 81 d_time: 0.007 s Sig: 52428 SNR: 44461 BER: 1728 UBLK: 54 Stat: 0x03 [SIG CARR ] > cycle: 82 d_time: 0.003 s Sig: 51657 SNR: 61423 BER: 1728 UBLK: 5 Stat: 0x1f [SIG CARR VIT SYNC LOCK ] > cycle: 83 d_time: 0.237 s Sig: 40092 SNR: 47288 BER: 1048575 UBLK: 66 Stat: 0x00 [] > cycle: 84 d_time: 0.005 s Sig: 56283 SNR: 45232 BER: 1728 UBLK: 113 Stat: 0x00 [] > cycle: 85 d_time: 0.006 s Sig: 53199 SNR: 46774 BER: 1728 UBLK: 136 Stat: 0x00 [] > cycle: 86 d_time: 0.008 s Sig: 50115 SNR: 44975 BER: 1728 UBLK: 55 Stat: 0x00 [] > cycle: 87 d_time: 0.004 s Sig: 53199 SNR: 53970 BER: 1728 UBLK: 287 Stat: 0x1f [SIG CARR VIT SYNC LOCK ] > cycle: 88 d_time: 0.020 s Sig: 50886 SNR: 61166 BER: 1728 UBLK: 62 Stat: 0x03 [SIG CARR ] > > Current parameters: > Frequency: 746000.000 kHz > Inversion: ON > Symbol rate: 6.900000 MSym/s > FEC: none > Modulation: QAM 64 > > Card is just bought newly: > > 00:06.0 0480: 1131:7146 (rev 01) > Subsystem: 13c2:101a > Flags: bus master, medium devsel, latency 32, IRQ 17 > Memory at fbeffc00 (32-bit, non-prefetchable) [size=512] > Kernel driver in use: budget_ci dvb > > Other (tested favourite) channels are tuned in fine. > > No network problems for this transponder reported in cable provider's support forums. > > Anyone got the chips datasheet or a hint what to tweak in the tda827xa_dvbc[] for this frequency? > > { .lomax = 802000000, .svco = 2, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 1}, ? > > thx, > Y > tom > > > Hm, this gets complicated, tuning is fine at 722+754MHz but not on 746MHz, this is within the same control segment { .lomax = 720000000, .svco = 2, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 1}, { .lomax = 802000000, .svco = 2, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 1},