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Guest Message by DevFuse


HR34/C31 and diplexer

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4 replies to this topic

#1 OFFLINE   jkal25


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Posted 02 February 2013 - 07:17 AM

I recently upgraded my workhorse HR20's to a Genie and two C31's. In the Boston market, I can get some additional channels off-air using the AM21 with the HR34 (additional PBS's mostly).

I'm wondering if anyone has any experience with diplexers and the C31's. I've had the setup for a week or so, and the C31's were working great, and last night I added the diplexer to the HR34, and the C31's still connected fine, so I thought I was out of the woods, but last night actually watching TV off a C31 for a period of time, the image would periodically (and apparently randomly) freeze for a second to three. At one time, the C31 said it couldn't find the server and it came back a few seconds later. I'm guessing it's related to the diplexer I added (to get my antenna to the AM21). I've had no problem watching TV on the HR34. As of now, I just have the diplexer inline and no antenna connected (that was to be today's project).

Does anyone have any experience using one diplexer over another, or using one with a HR34/C31 combo? The one I have now is labeled 40-2150MHz, but i noticed the 8-way splitter that was recently installed is labeled 2-2150Mhz, but I have no idea where the HR34/C31 communication happens to know if that low end would cause this issue.

Thanks for the help and suggestions.

- Joe

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#2 OFFLINE   veryoldschool


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Posted 02 February 2013 - 09:44 AM

That you've gotten it to work at all shows the diplexer is of poor quality.
The coax networking signal is in the OTA band/range, so with a quality diplexer, it would not pass to the C31.

#3 OFFLINE   jkal25


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Posted 02 February 2013 - 06:57 PM

Well, I guess that answers it - the coax networking being in the OTA range kills that.

Is there a reference that lists the frequencies used for the coax networking? It looks like 500-600MHz?

I guess it's a second cable then for the off air...

Thank you.

#4 OFFLINE   jacksonm30354



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Posted 02 February 2013 - 08:22 PM

You shouldn't need diplexers at all. If the AM21 is connected to the HR34, and OTA channels setup, the C31's can see those OTA channels as well.

Edit: this assumes there is a separate coax from the antenna to the AM21.

#5 OFFLINE   peds48



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Posted 10 February 2013 - 08:57 AM

Edit: this assumes there is a separate coax from the antenna to the AM21.

Which I think is the OP's issue…:lol:

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