[mythtv-users] HDHR app can tune a station but Myth via HDHR can't

DryHeat122 dryheat122 at gmail.com
Thu Feb 29 04:15:07 UTC 2024

On Wed, Feb 28, 2024, 9:00 PM Gary Buhrmaster <gary.buhrmaster at gmail.com>

> On Thu, Feb 29, 2024 at 3:37 AM DryHeat122 <dryheat122 at gmail.com> wrote:
> >
> > I have a HDHR Duo. For one station (Channel 12), the HDHR app can tune
> it just fine. When I try to "watch this channel" on Myth via Program Guide,
> "signal" (IDK if that is strength or quality) dithers between 56% & 59% and
> it can't get a lock. Recordings on that channel also fail.
> >
> > What could explain this? Every other channel works fine. I am only 9 mi
> as the crow flies from the mountain where all the stations broadcast.
> Rabbitears.com lists the signal as good. If the app can lock the signal
> accessing through the device then Myth accessing through the device should
> able to also, no?
> Yes, but.  If the signal is "too strong", the HDHR's
> can overload their frontend(*) and the decoding
> can fail.  And if you do not have an LTE filter, one
> can find that the local (600Mhz) LTE signal
> from one or more of the local mobile providers
> results in overloads on the front end.  And,
> lastly, sometimes too strong a signal can
> overload the frontend too, which can require
> a pad(**), although if your other channels
> are (deep) fringe may require a channel
> specific pad (which is available, but typically
> not cheap).
> (*) RF frontend is a well understood term
> in EE and RF physics.
> (**) aka attenuator

It seems like if the first two were the case, the HDHR app wouldn't be able
to tune the channel either, but it can. As for  too strong a signal
overloading Myth, channels with higher signal strength according to the
rabbitears.com report get locked by Myth just fine.

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