[linux-dvb] What should scan files look like

Peter Fassberg pf at leissner.se
Wed Sep 20 21:42:54 CEST 2006


Hi Alan!

You are perfectly right!

All my files look that way.



-- Peter Fassberg




On Wed, 20 Sep 2006, Alan Chandler wrote:

> I am a bit puzzled over exactly what scan files (ie the driving file for the
> scan program) should contain.
>
> In particular, with my Freecom usb pen drive (14aa:0225 ids),  the scan file
> for the UK Crystal Palace that is distributed with scan does not work.  It
> has the single line
>
> T 505833333 8MHz 3/4 NONE QAM16 2k 1/32 NONE
>
> noting in particular the frequency of 505.83MHz, against the published
> frequency for JUST ONE of the multiplexes at Crystal Palace of 506MHz.
>
> There was a post on this list that the Freecom device needed an exact
> frequency because of a firmware bug, so I did create a new file with
>
> T 506000000 8MHz 3/4 NONE QAM16 2k 1/32 NONE
>
> And it appears to find the channels on one of the multiplexes.
>
> But Crystal Palace has six multiplexes for digital terrestial TV, some with
> frequencies above and below the 506MHz
>
> I had a poke around the code as to how it was finding frequencies to scan, but
> couldn't really understand it.  It appeared to be generating the next scan
> frequency once it had done the initial tune, but it was too hard without
> really getting down and understanding it.
>
> I have created a file with the following in, and it works (in the sense that
> it scans the 6 frequencies mentioned and finds loads of channels, and then
> starts looking at others and fails most of the time but does seem to pick up
> some more)
>
> T 506000000 8MHz 3/4 NONE QAM16 2k 1/32 NONE
> T 482000000 8MHz 3/4 NONE QAM64 2k 1/32 NONE
> T 562000000 8MHz 3/4 NONE QAM64 2k 1/32 NONE
> T 530000000 8MHz 3/4 NONE QAM16 2k 1/32 NONE
> T 578000000 8MHz 3/4 NONE QAM16 2k 1/32 NONE
> T 538000000 8MHz 3/4 NONE QAM16 2k 1/32 NONE
>
> So is this what the uk-CrystalPalace file _should_ look like, or have I
> totally misunderstood what should happen
>
>
>




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