From: "Sébastien RAILLARD (COEXSI)" <sr@coexsi.fr>
To: "'Oliver Endriss'" <o.endriss@gmx.de>,
"'Linux Media Mailing List'" <linux-media@vger.kernel.org>
Cc: "'Malcolm Priestley'" <tvboxspy@gmail.com>
Subject: RE: [DVB] TT S-1500b tuning issue
Date: Wed, 6 Jul 2011 13:34:12 +0200 [thread overview]
Message-ID: <007201cc3bd0$a1b4aa70$e51dff50$@coexsi.fr> (raw)
In-Reply-To: <201107040043.00393@orion.escape-edv.de>
> -----Original Message-----
> From: Oliver Endriss [mailto:o.endriss@gmx.de]
> Sent: lundi 4 juillet 2011 00:43
> To: Linux Media Mailing List
> Cc: Sébastien RAILLARD (COEXSI); Malcolm Priestley
> Subject: Re: [DVB] TT S-1500b tuning issue
>
> On Wednesday 29 June 2011 15:16:10 Sébastien RAILLARD wrote:
> > Dear all,
> >
> > We have found what seems to be a tuning issue in the driver for the
> > ALPS BSBE1-D01A used in the new TT-S-1500b card from Technotrend.
> > On some transponders, like ASTRA 19.2E 11817-V-27500, the card can
> > work very well (no lock issues) for hours.
> >
> > On some other transponders, like ASTRA 19.2E 11567-V-22000, the card
> > nearly never manage to get the lock: it's looking like the signal
> > isn't good enough.
>
> Afaics the problem is caused by the tuning loop
> for (tm = -6; tm < 7;)
> in stv0288_set_frontend().
>
> I doubt that this code works reliably.
> Apparently it never obtains a lock within the given delay (30us).
>
> Could you please try the attached patch?
> It disables the loop and tries to tune to the center frequency.
>
Ok, I've tested this patch with ASTRA 19.2 #24 transponder that wasn't
always working: it seems to work.
I think it would be great to test it for few days more to be sure.
> CU
> Oliver
>
> --
> ----------------------------------------------------------------
> VDR Remote Plugin 0.4.0: http://www.escape-edv.de/endriss/vdr/
> 4 MByte Mod: http://www.escape-edv.de/endriss/dvb-mem-mod/
> Full-TS Mod: http://www.escape-edv.de/endriss/dvb-full-ts-mod/
> ----------------------------------------------------------------
next prev parent reply other threads:[~2011-07-06 11:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-29 13:16 [DVB] TT S-1500b tuning issue Sébastien RAILLARD (COEXSI)
2011-06-30 22:21 ` [PATCH] STV0288 Fast Channel Acquisition Malcolm Priestley
2011-07-01 8:15 ` Sébastien RAILLARD (COEXSI)
2011-07-03 20:38 ` Malcolm Priestley
2011-07-03 22:42 ` [DVB] TT S-1500b tuning issue Oliver Endriss
2011-07-06 11:34 ` Sébastien RAILLARD (COEXSI) [this message]
2011-07-06 20:35 ` Malcolm Priestley
2011-07-10 22:22 ` [PATCH] STV0288 frontend provide wider carrier search and DVB-S2 drop out Malcolm Priestley
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