<br><br><div class="gmail_quote">On Mon, Dec 22, 2008 at 4:46 PM, Brian Wood <span dir="ltr"><<a href="mailto:beww@beww.org">beww@beww.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="Wj3C7c">On Monday 22 December 2008 14:35:22 Travis Tabbal wrote:<br>
> On Mon, Dec 22, 2008 at 2:31 PM, A JM <<a href="mailto:vbtalent@gmail.com">vbtalent@gmail.com</a>> wrote:<br>
> > Interesting topic guys and terrific information!<br>
> ><br>
> > My TV only has a single coax input - is there a way to combine<br>
> > over-the-air channels with the cable company cable into a single source?<br>
> ><br>
> ><br>
> > (OA) (CABLE)<br>
> ><br>
> > \ /<br>
> > Y<br>
> ><br>
> ><br>
> > (TV Input)<br>
><br>
> Combiners exist to do things like that. Usually for multiple antenna<br>
> systems. Why would you want to do that with cable/OTA? Cable has the OTA<br>
> signals on it, wouldn't it be easier to use those?<br>
<br>
</div></div>Yes, but directional couplers are uch better for that purpose.<br>
<br>
DO NOT do what the drawing indicates, because:<br>
<br>
Cable TV uses frequencies that are not used for TV broadcasting, some of which<br>
are used for aeronautical navigation.<br>
<br>
You would be sending CATV signals out your antenna, attenuated only by the<br>
isolation loss of the splitter/combiner, which is usually speced at 30db.,<br>
but is usually much less, as the isolation spec assumes all ports are<br>
perfectly terminated at all frequencies.<br>
<br>
Cable systems are required to scan regularly for signals leaking out of their<br>
system, and in this case you would probably have a cable truck outside your<br>
door pretty soon, if hey are doign their job.<br>
<br>
You will also get severe interference on the channels that are used for oTA in<br>
your area and also used by the cable system.<br>
<br>
Show that little drawing to your cable system's chief engineer, and you will<br>
be able to see what a heart attack looks like when in progress.<br>
<font color="#888888"><br>
<br>
--<br>
beww<br>
<a href="mailto:beww@beww.org">beww@beww.org</a><br>
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</div></div></blockquote></div><br>Heart Attack = Not good!...<br><br>Do you have a link to a product that would work?<br><br>Thanks,<br>