[mythtv-users] Adding HDHR to a master backend with an HDPVR already

David Engel david at istwok.net
Wed Dec 16 21:02:06 UTC 2009

On Wed, Dec 16, 2009 at 12:24:17PM -0600, Johnny Walker wrote:
> On Wed, Dec 16, 2009 at 9:28 AM, Johnny Walker <johnnyjboss at gmail.com> wrote:
> > On Wed, Dec 16, 2009 at 9:05 AM, Mike Perkins
> >> You may be picking up the same channels broadcast by more than one
> >> transmitter.
> >
> > I'm using US-CABLE (specifically TimeWarner in Dallas Texas). So these
> > are all on the same wire. Thus my confusion - how can they be a
> > conflict if they are all on the same wire to begin with?
> >
> > ?In that case, the same channel (ID) will be broadcast on a
> >> different channel (frequency) in order to avoid interference problems.
> >>
> >> When myth scans the second (or subsequent) channel with the same ID it
> >> doesn't know what to do with it. Is this the one you're supposed to have, or
> >> was it the previous one(s)?

I don't believe dupllicate IDs on the wire is the problem.  I
suspected Time Warner might be passing the station ID on the SD
simulcasts.  I just did a scan outside of Myth and that's not the

I need to do a new scan myself from within Myth to pick up 8.3 and
13.2 which were recently added.  I will let you know if I run into the
same problem.

> >> delete each source individually? 'Delete all sources' guarantees to clean
> >> out all of the database info from previous attempts.
> >
> > Good to know - not sure how I did it but I suppose I know how I'll be
> > re-doing it.
> I'm using the HDHR on a digital cable system, and I'm just wanting the
> local channels (i'll take whatever else I can find though) for when
> the big networks run shows against each other in Prime Time.

You'll only find the locals and a small smattering of SD channels like
CSPAN and HSN.  You might want to check out the Time Warner DFW thread
on DSL Reports (http://www.dslreports.com/forum/remark,16660665).  It
often has useful information.  Someone periodically posts an Excel
spreadsheet with the current QAM mappings.  In fact, we should be due
for a new one with the new channels getting added tomorrow.

David Engel
david at istwok.net

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