From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-out.m-online.net ([212.18.0.9]) by www.linuxtv.org with esmtp (Exim 4.63) (envelope-from ) id 1JP2Mo-0006MI-AV for linux-dvb@linuxtv.org; Tue, 12 Feb 2008 22:08:38 +0100 From: Matthias Schwarzott To: Eduard Huguet Date: Tue, 12 Feb 2008 22:08:07 +0100 References: <47ADC81B.4050203@gmail.com> <47AECFEF.3010503@gmail.com> <47B0134D.90006@gmail.com> In-Reply-To: <47B0134D.90006@gmail.com> MIME-Version: 1.0 Content-Disposition: inline Message-Id: <200802122208.07450.zzam@gentoo.org> Cc: linux-dvb@linuxtv.org Subject: Re: [linux-dvb] Some tests on Avermedia A700 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Sender: linux-dvb-bounces@linuxtv.org Errors-To: linux-dvb-bounces@linuxtv.org List-ID: On Monday 11 February 2008, you wrote: > En/na Eduard Huguet ha escrit: > > En/na Matthias Schwarzott ha escrit: > >> On Samstag, 9. Februar 2008, Eduard Huguet wrote: > >>> Hi, Matthias > >> > >> Hi Eduard! > >> > >>> I've been performing some tests using your patch for this card. > >>> Right now neither dvbscan nor kaffeine are able to find any channel on > >>> Astra (the sat. my dish points to). > >>> > >>> However, Kaffeine has been giving me some interesting results: with > >>> your driver "as is" it's getting me a 13-14% signal level and ~52% SNR > >>> when scanning. Then, thinking that the problem is related to the low > >>> signal I have I've changed the gain levels used to program the tuner: > >>> you were using default values of 0 for all (in > >>> zl1003x_set_gain_params() function, variables "rfg", "ba" and "bg"), > >>> and I've changed them top the maximum (according to the documentation: > >>> rfg=3D1, ba=3Dbg=3D3). With that, I'm getting a 18% signal level, whi= ch is > >>> higher but still too low apparently to get a lock. > >>> > >>> I've stopped here, because I really don't have the necessary backgrou= nd > >>> to keep tweaking the driver. I just wanted to share it with you, as > >>> maybe you have some idea on how to continue or what else could be don= e. > >> > >> So I can do only this guess: > >> I changed demod driver to invert the Polarization voltage for a700 car= d. > >> This is controlled by member-variable voltage_inverted. > >> > >> static struct mt312_config avertv_a700_mt312 =3D { > >> .demod_address =3D 0x0e, > >> .voltage_inverted =3D 1, > >> }; > >> > >> Can you try to comment the voltage_inverted line here (saa7134-dvb.c: > >> line 865). > >> > >> BUT: If this helps we need to find out how to detect which card needs > >> this enabled/disabled. > >> > >> Regards > >> Matthias > > > > Hi, > > Nothing :(. Removing (or setting it to 0) the voltage_inverted > > member doesn't seem to make any difference. I'm starting to suspect > > that there is something wrong with my antennae setup, so I'll test it > > later using an standalone STB or by plugging the card into a Windows > > computer and using the supplied drivers. > > > > Regards, > > Eduard > > By the way (sorry if I'm being molest...): I will leave the card in this > PC for now, as it's easier fo me to test and develop. As I have also > Windows here =BFis there any way we could do any reverse enginnering from > Windows driver, etc...? > I already asked you to compare eeprom output in dmesg. But did you also = compare GPIO messages - like init-values read after startup (to detect = different wiring)? This is from my dmesg output: "saa7133[0]: board init: gpio is a600" Or just attach dmesg output after a cold boot and loading saa7134 driver (w= ith = i2c_scan=3D1). Maybe I create a patch where you can select the other existing zl10313 driv= er. So we can compare the logs / functionality. Matthias -- = Matthias Schwarzott (zzam) _______________________________________________ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb