combine 2 video signals to one

[[email protected]]

I have a requirement. I can only get in one cable inside my
apartment...Is there a way (any device) to combine 2 cables, the cable
tv cable and the satellite dish cable to just one cable that I can
connect to my tv input and the auto-detect will go thorugh the
frequencies to set up my channels.

Is this even possible..because I do not know what range of frequencies
do the satellite dish channels fall under.

 

[John Jardine.]

I have a requirement. I can only get in one cable inside my
apartment...Is there a way (any device) to combine 2 cables, the cable
tv cable and the satellite dish cable to just one cable that I can
connect to my tv input and the auto-detect will go thorugh the
frequencies to set up my channels.

Is this even possible..because I do not know what range of frequencies
do the satellite dish channels fall under.

There's so many ifs and buts involved, I'd be inclined just to wire the
cables to a TV coax 'splitter box' and give it a try. (not on if the cables
are carrying DC control voltages).
john

 

[no_one]

you can get a diplexer that combines the signal upstairs and another that
splits them back downstairs. You need to get one that will pass the DC
power from the satellite receiver to the LNA on the dish.

 

[joseph2k]

There's so many ifs and buts involved, I'd be inclined just to wire the
cables to a TV coax 'splitter box' and give it a try. (not on if the
cables are carrying DC control voltages).
john

Alas, the satellite cable always carries DC voltage, have to power the LNB.
There are means to get the satellite LNB power through the combined section
but it requires 4 additional boxes, not generally available to the consumer
either.

 

[joseph2k]

you can get a diplexer that combines the signal upstairs and another that
splits them back downstairs. You need to get one that will pass the DC
power from the satellite receiver to the LNA on the dish.

See previous; the splitter / combiners do not pass DC normally. Thus bias
tees on both sides of each splitter / combiner.

 

[Michael A. Terrell]

Alas, the satellite cable always carries DC voltage, have to power the LNB.
There are means to get the satellite LNB power through the combined section
but it requires 4 additional boxes, not generally available to the consumer
either.

What the hell? Even Radio Shack sold the lousy things. They have a
splitter to separate the two bands, and pass DC to the SAT port. one on
each end and you eliminate on coax run, if it is capable of handling
the signals. They were about $10 each.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Paul Hovnanian P.E.]

See previous; the splitter / combiners do not pass DC normally. Thus bias
tees on both sides of each splitter / combiner.

This is true. However, there are some antenna switching circuits that
are controlled by a DC signal. With a little ingenuity, one could switch
the LNA supply on or off and arrange that to forward/reverse bias some
blocking diodes in the cable input.

 

[jasen]

See previous; the splitter / combiners do not pass DC normally. Thus bias
tees on both sides of each splitter / combiner.

splitters that pass dc (and low AC) on one leg are avalable

Bye.
Jasen