[vdr] Re: Finnish DVB-C problems solved

["Lauri Pesonen" <lauri.pesonen@firsthop.com>]

On Thu, Jul 25, 2002 at 08:38:43PM +0100, Dave Chapman wrote:

> This sounds similar to the channel offsets (+/- 167KHz) applied to UK DVB-T 
> transmissions.  It is done to help minimise interference with analogue PAL 
> broadcasts on adjacent channels.
> 

Probably. It's just weird that the information from the provider does not 
include this. I mean the NIT could easily state that the freq is 282750000 
instead of the 283000000 that it currently states.

> > A patch to VDR would include subtracting the specified frequency by the 
> > appropriate amount stated above before tuning. But since this is Finland 
> > specific I guess we'll just have to patch our VDR's our selves. [ 
> > channels.conf uses MHz for frequencies, there's no way to specify KHzs in 
> > channels.conf ]
> 
> I think the correct patch to VDR would be to allow the user to specify the 
> frequency in either MHz or KHz.
> 
> This could be made in a way that is compatible with existing cable 
> channels.conf files - if the DVB-C frequency is less than 1000, then assume 
> it is in MHz, otherwise it is in KHz.

This is very elegant. Should've thought about the problem a few minutes 
longer before posting ;) I fixed the problem by subtracting the 
channels.conf specified freq in VDR while doing the channel switch based 
on the QAM value (I have some QAM related stuff there of my own so it was 
a breeze to write it).

I'll write a patch and email it to Klaus with some other stuff.

> Regards,
> 
> Dave.
> 

br, Lauri