From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from fg-out-1718.google.com ([72.14.220.155]) by www.linuxtv.org with esmtp (Exim 4.63) (envelope-from ) id 1JOUnu-0001lo-6E for linux-dvb@linuxtv.org; Mon, 11 Feb 2008 10:18:22 +0100 Received: by fg-out-1718.google.com with SMTP id 22so3612438fge.25 for ; Mon, 11 Feb 2008 01:18:20 -0800 (PST) Message-ID: <47B012DA.7010903@gmail.com> Date: Mon, 11 Feb 2008 10:18:18 +0100 From: Eduard Huguet MIME-Version: 1.0 To: Matthias Schwarzott References: <47ADC81B.4050203@gmail.com> <200802092214.06946.zzam@gentoo.org> <47AECFEF.3010503@gmail.com> In-Reply-To: <47AECFEF.3010503@gmail.com> 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: multipart/mixed; boundary="===============1517675555==" Mime-version: 1.0 Sender: linux-dvb-bounces@linuxtv.org Errors-To: linux-dvb-bounces@linuxtv.org List-ID: This is a multi-part message in MIME format. --===============1517675555== Content-Type: multipart/alternative; boundary="------------060801080503020108020004" This is a multi-part message in MIME format. --------------060801080503020108020004 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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=1, ba=bg=3). With that, I'm >>> getting a 18% signal level, which is higher but still too low apparently >>> to get a lock. >>> >>> I've stopped here, because I really don't have the necessary background >>> 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 done. >>> >>> >> >> So I can do only this guess: >> I changed demod driver to invert the Polarization voltage for a700 card. >> This is controlled by member-variable voltage_inverted. >> >> static struct mt312_config avertv_a700_mt312 = { >> .demod_address = 0x0e, >> .voltage_inverted = 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 > > Hi again... Just some more feedback: I've unplugged the card and put it onto a different PC running both Windows and Gentoo. In Windows the card runs perfectly, I can see all the (free) channels, so I can be sure there's no problem with my antennae setup. In Linux it doesn't work, neither in this PC (P4 running Gentoo 32) nor in the mediacenter PC (AMD AthlonXP running Gentoo 64). It seems we are missing something fundamental here... :( Best regards, Eduard --------------060801080503020108020004 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit 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=1, ba=bg=3). With that, I'm
getting a 18% signal level, which is higher but still too low apparently
to get a lock.

I've stopped here, because I really don't have the necessary background
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 done.

    

So I can do only this guess:
I changed demod driver to invert the Polarization voltage for a700 card.
This is controlled by member-variable voltage_inverted.

static struct mt312_config avertv_a700_mt312 = {
        .demod_address = 0x0e,
        .voltage_inverted = 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



Hi again...
    Just some more feedback: I've unplugged the card and put it onto a different PC running both Windows and Gentoo. In Windows the card runs perfectly, I can see all the (free) channels, so I can be sure there's no problem with my antennae setup.

In Linux it doesn't work, neither in this PC (P4 running Gentoo 32) nor in the mediacenter PC (AMD AthlonXP running Gentoo 64). It seems we are missing something fundamental here... :(

Best regards,
  Eduard




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