[linux-dvb] Re: dvbsak

[Luc de Louw <luc@delouw.ch>]

On Thursday 12 December 2002 21.24, Juha Yrjölä wrote:
[..]

> It's enough that you find one transport stream which has NIT's (Network
> Information Tables) for the other transport streams on the network.
> dvbsak will save the information (including the frequencies) in
> ~/.dvb/channels.conf. You might find out some frequencies (you also need
> to know the modulation and symbol rate) from Windows, though. I don't

What are the possible modulations? (is this the QAM-stuff?) What are the 
possible symbol rates?
It would be nice if someone can point to some documentation to learn more 
about that stuff.

> know how (probably from config files somewhere), but maybe someone else
> has an idea.

Will try to find some stuff in the deep of Windoofs registry or in a config 
file of the software used. Any hints to Windows Software that provides a 
"proper" config-file which can be useful for vdr etc. is appreciated.

Right now I'm now sanning the stuff with no step-size, and got:

DVB-C: 139.562 MHz, symbol rate 7146 ksym/s, modulation 64-QAMFF6 unc: FFFF
DVB-C: 139.625 MHz, symbol rate 7146 ksym/s, modulation 64-QAMFF6 unc: FFFF
  Str[****************    ] SNR[**************      ] BER: 9FFFF6 unc: FFFF 
LOCK
Found transport stream at 139.625 MHz.
Scanning for info... [PAT timed out]
DVB-C: 139.688 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
DVB-C: 139.750 MHz, symbol rate 7146 ksym/s, modulation 64-QAMFF6 unc: FFFF
[..]
DVB-C: 160.250 MHz, symbol rate 7146 ksym/s, modulation 64-QAM032 unc: FFFF
DVB-C: 160.312 MHz, symbol rate 7146 ksym/s, modulation 64-QAM032 unc: FFFF
  Str[******************  ] SNR[**************      ] BER: 80C032 unc: FFFF 
LOCK
Found transport stream at 160.312 MHz.
Scanning for info... [PAT timed out]
DVB-C: 160.375 MHz, symbol rate 7146 ksym/s, modulation 64-QAM
DVB-C: 160.438 MHz, symbol rate 7146 ksym/s, modulation 64-QAMFF6 unc: FFFF


rgds

Luc


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