linux-kernel - Re: DVB-S PCI card regression on 4.19 / 4.20

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Date:   Wed, 21 Nov 2018 21:20:35 +0000
From:   Malcolm Priestley <tvboxspy@...il.com>
To:     Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        stakanov <stakanov@...ipso.eu>
Cc:     Takashi Iwai <tiwai@...e.de>, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: DVB-S PCI card regression on 4.19 / 4.20

On 20/11/2018 16:08, Mauro Carvalho Chehab wrote:
> Em Tue, 20 Nov 2018 14:20:01 +0100
<snip>

> Ok. Now, min/max frequencies are at the same scale. For DVB-S, 
> dvb_frontend_get_frequency_limits() returns both in kHz, so the frequency
> range is now OK.
> 
> The tuning frequency is wrong through. 10,719,000 kHz - e. g. 10,719 MHz
> seems to be the transponder frequency you're trying to tune, and not the
> intermediate frequency used at the DVB-S board.
> 
> That sounds to me either a wrong LNBf setting or a bug at libdvbv5 or
> at Kaffeine's side. What happens is that the typical European LNBFs are:
> 
> 1) the "old" universal one:
> 
> UNIVERSAL
> 	Universal, Europe
> 	Freqs     : 10800 to 11800 MHz, LO: 9750 MHz
> 	Freqs     : 11600 to 12700 MHz, LO: 10600 MHz
I am pretty certain this type is obsolete it doesn't look right for 9750Mhz oscillator.

I am sure it was 10000Mhz or 96?? or something like that for old analogue transmissions of 
20 years ago

> 
> 2) the "new" universal one, with seems to be used by most modern
> satellite dishes in Europe nowadays:
> 
> EXTENDED
> 	Astra 1E, European Universal Ku (extended)
This needs renaming as 1E has long gone.

Certainly this type is used for Astra 19.2 and 28.2.

Ideally we should use a default LNB type for each Satellite either in libdvbv5, Kaffeine or respective tables.

Regards


Malcolm