[linux-dvb] DiB3000MC : autosearch doesn't work

Patrick Boettcher patrick.boettcher at desy.de
Sun Oct 22 12:14:20 CEST 2006


On Sat, 21 Oct 2006, Mario Rossi wrote:

> I've tried to AUTO scan since there seems to be changes in the DIB3000MC code.
> I've got a WinTV NOVA T USB 2.
> 
> Kaffeine:
> It scans properly when using uk-CrystalPalace
> It can only AUTO scan (0, +167k, -167K) the HDTV trial channels (ITV,
> Ch4, BBC, Five)
> 
> "scan" from dvb-apps
> Everything ok with the default file uk-CrystalPalace
> T 505833333 8MHz 3/4 NONE QAM16 2k 1/32 NONE
> But if I try
> T 505833333 8MHz NONE NONE QAM16 2k 1/32 NONE
> it does not work.

The original problem was not to set all parameters to wrong values (this 
is what you are doing NONE is wrong in this field, AUTO, 1/2, 2/3, 3/4 5/6 
and 7/8 are valid) and then let the demod guess what might be correct, but 
to see if parameters set to AUTO are then really autosearched.

> So it seems that one has to specify 3/4 for the standard channels
> (QAM16 2k), while for HDTV channels (QAM64 8k) NONE is good enough.

"Good enough" is not the correct term. This is not a tuneable parameter 
but a fixed one telling you which FEC is used by the boardcaster.

Patrick.

--
  Mail: patrick.boettcher at desy.de
  WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/



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