Diplexer

Archived from groups: alt.tv.tech.hdtv (More info?)

"Flyer" <donald.e.benson@worldnet.att.net> wrote in message
news:b41xc.20889$Gx4.16835@bgtnsc04-news.ops.worldnet.att.net...
> I have been told that a diplexer will not work on an outdoor antenna feed
> for HDTV and DirecTV (Samsung TS-160 Rec). Anyone know if that is true?
> Thanks.
>
>
Lots of people, including me, use diplexers for outdoor antennas along with
DirecTV with no problem. It's best to protect the diplexer connections from
the weather though.

Pat

Archived from groups: alt.tv.tech.hdtv (More info?)

> Just to expand on this, they do work with HDTV. I did find, however,
> that the internal diplexer on the Hughes E86 killed some of the signal
> strength from the antenna, so by switching to an external diplexer on
> the receiver end, I have had better luck. I don't know if this is the
> same for the TS-160.

Diplexing causes some signal strength reduction with any receiver.
TANSTAAFL. It's atypical though that that reduction crosses the threshold
between a solid lock and transitory one.

Pat

Archived from groups: alt.tv.tech.hdtv (More info?)

In article <t9s9c0tnrbfkoir9omk8ucccs99pp5mk0g@4ax.com> K Walker
<nospam@nospam.com> writes:


>>> Just to expand on this, they do work with HDTV. I did find, however,
>>> that the internal diplexer on the Hughes E86 killed some of the signal
>>> strength from the antenna, so by switching to an external diplexer on
>>> the receiver end, I have had better luck. I don't know if this is the
>>> same for the TS-160.

>>Diplexing causes some signal strength reduction with any receiver.
>>TANSTAAFL. It's atypical though that that reduction crosses the threshold
>>between a solid lock and transitory one.

>This was definitely crossing that threshold, but I do agree about the
>signal loss. Probably just a problem with the internal diplexer on my
>reciever.

Any passive device you put in line with your sat/ota signal will introduce
loss. Some more, some less. However, it is unusual that one lone device
(properly connected) will make a distinguishable difference in reception
quality unless your signals are of marginal strength to begin with or the
device is defective.

With OTA directional antennas, especially UHF, one of the most common
mistakes is that the antenna is aligned on a minor lobe (or reflection)
instead of on the main lobe. Without some type of RF-selective signal
meter it can be difficult to tell one from the other until path
attenuation activity occurs, such as rain or temperature inversion.


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