[mythtv-users] QAM question

Steven Adeff adeffs.mythtv at gmail.com
Sun Apr 9 17:49:16 UTC 2006


On 4/9/06, Mark J. Small <msmall at eastlink.ca> wrote:
> On April 8, 2006 05:06 pm, Steven Adeff wrote:
> > On 4/8/06, Mark J. Small <msmall at eastlink.ca> wrote:
> > > Hi everybody.
> > >
> > > I'm thinking about taking the leap and getting a card that can do QAM
> > > decoding for my cable system.  My biggest worry is this; what happens
> > > when the cable system changes its channel map?  I assume that the only
> > > way that I will notice is that some recordings fail.  It sounds a little
> > > scary to me.
> > >
> > > I know that the channel map changed recently on my system,  and there is
> > > nothing stopping my provider from changing it again next week.
> > >
> > > Mark
> >
> > digital channels don't use the traditional channel method, so its very
> > unlikely that your cable company will change what channel the digital
> > channels are broadcast on, they will just remap the cableboxes to link
> > them to the different channel.
> > so basically it shouldn't be a problem. at worse, you rescan to find
> > where they moved them to...
>
> Actually, my cable system just changed frequencies for some digital channels a
> few weeks ago.  They added a new analog channel, and all of the digital
> channels that were on that frequency are now somewhere else.
>
> I was bored one day, and found the frequencies for all the digital channels
> using the service menus of my cable box.  I don't have the energy to do it
> again right now, so it could be that many of the frequencies have changed.
>
> My point is that if my cable system does this again, then there is no way for
> me to know about it until my recordings start to fail.  This would really
> stick if it happened at the beginning of a 2 week vacation...
>
> My cable company is planning on adding several new channels soon, so I really
> don't know how much the digital channels will jump around.  Failed recordings
> would really mess up my WAF.

The problem is, if the channel moves, and even if Myth can tell that
its no longer there, the channel scan would require human intervention
anyway. I don't know of any DVR other than the cable company provided
one that would be able to handle this.

--
Steve


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