Digital TV Remodulator

RST Engineering - JIm · 2009-06-18T17:24:02+00:00

OK, I freely admit that I'm out of my depth with the new digital TV. However, like Joerg, I live so far out in the boondocks that they have to pipe in sunshine. (about 50 miles north of Joerg and about the same elevation, longitude, and problems).Anyway, we are switching over to digital TV and have the "TV room" pretty well arranged with a LCD HD digital TV, satellite (directv) receiver, and all work well. However, we have a small digital TV in the upstairs room (directly above the downstairs TV) that is only connected right now to an antenna on the roof. As described elsewhere, living 80+ miles from the nearest transmitter doesn't provide a signal worth a damn to a digital TV. SOmetimes fair, sometimes very pixillated, sometimes blue screen of death.What I'd like to do is take that satellite signal coming into the satellite receiver and transmit it by RF to the TV set above. In the "good old days" you could buy (or easily build) a remodulator that would take the composite audio/video and put out a signal on old VHF channels 3 or 4 (switch selectable) and with a trivial dipole transmit that signal a few dozen feet to another TV.I've scanned the usual sources (Ramsey, AC6V, etc.) for either a kit, or plans, or some other source to find out how to "remodulate" the digital signal coming from the satellite onto the new format TV and have come up blank.Anybody got a pointer to at least some basic information on how I might do this in the new digital world? Right now I've got enough design projects for the business to keep me going for twenty years, so if anybody knows of an off-the-shelf box that will do the job, that's great. Yes, I googled what I thought were the appropriate words and came up dry.Jim

Jun 18, 2009 25 Replies

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Jim Thompson 17 years ago

WiFi.

loss..

Heat? Heat? What's that? Ah, yes, now I remember... it's what I'm going to need in a few years... because of Global "Warming" ;-)

...Jim Thompson

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Charlie E. 17 years ago

Jim, After looking at the other posts, this is what I would do...

First, you aren't going to transmit digital from the directtv box up to the bedroom. They aren't making small digital transmitters or encoders. Instead, get the RF remote for your DirectTV box, and a standard RF modulator. The one I found at either Best Buy or Walmart has S-video in, so you can use it, and just do the antenna thing for the analog signal to do the actual link.

I didn't know they had RF remotes, or I would have done that in my house instead of the second receiver in the bedroom. Then, I could have used the DVR features from there, too!

Charlie

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Rich Grise 17 years ago

Either of you guys anywhere near Beale?

Cheers! Rich

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Rich Grise 17 years ago

You _could_ set your digital box to output channel 3 or 4, and use a splitter to send it to the TV room TV and to a little antenna for the upstairs TV.

I emphasize "could" because I've been running on channel 3; I'd like to use the video RCA jacks, but I need a stereo/mono summer. It's almost trivial to build one, just 2 male RCAs, 1 female, and 2X 1K R.

What would I search on if I want one off the shelf?

Thanks! Rich

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RST Engineering - JIm 17 years ago

About 15 miles due east.

formatting link

and you can see Beale on the horizon at the top of the picture if you use your imagination.

Jim

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JosephKK 17 years ago

strenght=20

the=20

doesn't=20

with WiFi.

link loss..

More like a faraday labyrinth.

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