Re: French DVB-T Channel IDs vs. EIT Channel IDs

On 01.03.2018 11:39, Patrick Boettcher wrote:
> On Thu, 1 Mar 2018 10:22:10 +0100
> Patrick Boettcher <[email protected]> wrote:
> 
>> On Wed, 28 Feb 2018 11:01:23 +0100
>> Klaus Schmidinger <[email protected]> wrote:
>> 
>> > On 27.02.2018 17:58, Patrick Boettcher wrote:  
>> > > On Tue, 27 Feb 2018 16:54:35 +0100
>> > > Klaus Schmidinger <[email protected]> wrote:
>> > >     
>> > >> Hello Patrick,
>> > >> 
>> > >> your scan doesn't contain the NIT, which is where the transponder
>> > >> innformation is broadcast. Can you scan that, too, please?    
>> > > 
>> > > Hi Klaus,
>> > > 
>> > > NIT attached (from another multiplex with the same symptoms).    
>> > 
>> >              DVB-DescriptorTag: 90 (0x5a)  [=
>> > terrestrial_delivery_system_descriptor] descriptor_length: 11 (0x0b)
>> >              Center frequency: 0xffffffff (= 42949672.095 kHz)
>> > 
>> > @@ -219,6 +219,8 @@
>> >                    cDvbTransponderParameters dtp;
>> >                    int Source = cSource::FromData(cSource::stTerr);
>> >                    int Frequency = Frequencies[0] =
>> > sd->getFrequency() * 10;
>> > +                 Frequency = Transponder() * 1000000;//XXX
>> > +                 dsyslog("Frequency = %08X, Transponder = %d",
>> > sd->getFrequency(), Transponder());//XXX static int Bandwidths[] =
>> > { 8000000, 7000000, 6000000, 5000000, 0, 0, 0, 0 };
>> > dtp.SetBandwidth(Bandwidths[sd->getBandwidth()]); static int
>> > Constellations[] = { QPSK, QAM_16, QAM_64, QAM_AUTO };  
>> 
>> It works. I had to have VDR recreate the channels because it was
>> mixing things up with the already existing ones.
>> 
>> As to why the frequency is set to "-10" I don't know (yet), but I
>> remember it has always been like this since 2005. 
> 
> Here is the explanation why the frequency field in French DVB-T shall
> not be used, (cf. CSA-Profil-de-signalisationv3.4.pdf, page 30,
> terrestrial_delivery_system_descriptor):
> 
>    le terrestrial delivery_system_descriptor diffusés dans la NIT
>    correspond au cas général. En effet, la NIT ne décrit pas de façon
>    exhaustive le réseau actuel d’émetteurs, mais l’organisation des
>    services des multiplex diffusés : ainsi les fréquences des multiplex
>    renseignées par le paramètre centre_frequency ont une valeur fixée à
>    0xFFFFFFFF. Ces fréquences ne sont pas à prendre en compte
> 
> It says, grosso modo, that the NIT does not describe the network in an
> exhaustive manner, but it does for services. Le field centre_frequency
> contains the value 0xFFFFFFFF and is not to be taken into consideration.

My last message was sent before I received your log.
I'll take a further look...

Klaus


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