[mythtv-users] What is changing my frequency tables?

Clay nt4usb at yahoo.com
Wed Jan 28 22:10:25 UTC 2009

> From: Jan Schneider <jan at horde.org>
> Subject: [mythtv-users] What is changing my frequency tables?
> To: mythtv-users at mythtv.org
> Date: Wednesday, January 28, 2009, 8:41 AM
> Hi,
> as mentioned in an earlier thread, I have a flaky TT C-2300
> DVB-c card that requires to downtune all transponder
> frequencies by 500kHz due to some card-specific brokenness.
> I don't want to patch the driver and neither do I want
> to hack the card. So I tried to do that in MythTV, but for
> some odd reasons that doesn't work.
> What I did was to change the transponder table of my cable
> service provider to subtract this 500kHz, and re-run
> dvbscan. That worked fine, but to my suprise all channels
> appeared twice, first with my frequency table, then another
> time with the original table. I removed the rows that I
> didn't want from channels.conf and imported it to
> MythTV. And the same thing happened again! Now I have a few
> questions:
> - Why is MythTV scanning the transponders again at all, I
> already provided the list with channels.conf?
> - Where are both, dvbscan and MythTV, getting the original
> frequency table from? Is it provided through the DVB signal?
> Are they hardcoded somewhere?
> - Finally: how can I stop that from happening?
> I could probably fill the channels and dtv_multiplex tables
> manually with a script, but I would rather like to use the
> on-board facilities. And I really want to understand what is
> happening there and why.

When you scan, are you using the option to 'scan existing transports'?
That shouldn't add freqs...


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