[mythtv-users] quad hdhr?

Kris B. krisbee at krisbee.com
Sat Oct 15 13:20:54 UTC 2011

On Saturday, October 15, 2011 1:15 PM, "Matt Harrison"
<iwasinnamuknow at genestate.com> wrote:
> Just got a dual HDHR from ebay to replace my ailing USB tuners. A breeze
> to set up and seems to be working flawlessly. I'm just a little confused.
> I added two tuners in the backend setup, one for each aerial input. The
> backend status on mythweb however shows 4, but only 2 unique ID numbers.
> Is this actually a quad HDHR?
No, Matt, but you can actually record two things at once - so sort of.

What has happened is that your HDHR set itself up to have two tuners,
one real and one virtual.  So you have two real and two virtual since
you have the dual tuner model.  This is ok, and helpful.

The OTA signal is usually multiplexed, so several streams are in the
signal (hence having channels 18.1, 18.2, etc.).  If something you want
is on the same mulitplex and the main tuner is being used, it will use
the virtual tuner and grab the other show at the same time, without
tying up your second physical tuner, so that one is available to tune in
a different frequency/station.

You can actually bump up the virtual tuners even higher (three or four),
but unless you are hooked up to cable, I just have never run into a
situation where that is helpful (and this way you know your REAL tuner
is a odd number = tuner 1 and 3).

Also, did this fix your original problem?  Just wondering...

  Kris B.
  krisbee at krisbee.com

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