[mythtv-users] OT: OTA HD

[A JM]

On Mon, Dec 22, 2008 at 4:46 PM, Brian Wood <beww at beww.org> wrote:

> On Monday 22 December 2008 14:35:22 Travis Tabbal wrote:
> > On Mon, Dec 22, 2008 at 2:31 PM, A JM <vbtalent at gmail.com> wrote:
> > > Interesting topic guys and terrific information!
> > >
> > > My TV only has a single coax input - is there a way to combine
> > > over-the-air channels with the cable company cable into a single
> source?
> > >
> > >
> > >       (OA)     (CABLE)
> > >
> > >              \    /
> > >                Y
> > >
> > >
> > >          (TV Input)
> >
> > Combiners exist to do things like that. Usually for multiple antenna
> > systems. Why would you want to do that with cable/OTA? Cable has the OTA
> > signals on it, wouldn't it be easier to use those?
>
> Yes, but directional couplers are uch better for that purpose.
>
> DO NOT do what the drawing indicates, because:
>
> Cable TV uses frequencies that are not used for TV broadcasting, some of
> which
> are used for aeronautical navigation.
>
> You would be sending CATV signals out your antenna, attenuated only by the
> isolation loss of the splitter/combiner, which is usually speced at 30db.,
> but is usually much less, as the isolation spec assumes all ports are
> perfectly terminated at all frequencies.
>
> Cable systems are required to scan regularly for signals leaking out of
> their
> system, and in this case you would probably have a cable truck outside your
> door pretty soon, if hey are doign their job.
>
> You will also get severe interference on the channels that are used for oTA
> in
> your area and also used by the cable system.
>
> Show that little drawing to your cable system's chief engineer, and you
> will
> be able to see what a heart attack looks like when in progress.
>
>
> --
> beww
> beww at beww.org
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>

Heart Attack = Not good!...

Do you have a link to a product that would work?

Thanks,
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mythtv.org/pipermail/mythtv-users/attachments/20081222/0f76b285/attachment.htm