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Guest Message by DevFuse

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OTA and new 5 LNB


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25 replies to this topic

#21 OFFLINE   veryoldschool

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Posted 20 July 2007 - 12:13 PM

I very much appreciate all of the information the Echelon has and the help that they provide. You all are valuable. I absolutely know that you all are trying to help. I am trying to learn why this is a bad idea. I am not trying to challenge you all.

I don't think anybody was taking it as a challenge.
I hope you now know that it's the distance the BBCs are from the receiver that is [or could be] the problem.
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#22 OFFLINE   harsh

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Posted 21 July 2007 - 08:00 AM

Why is the first answer on this always 'No"?

You need to understand the question to understand why the first answer was no. The question was if the OTA could be fed into the new multiswitch. The answer is no.

#23 OFFLINE   Meklos

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Posted 21 July 2007 - 09:35 AM

So I guess we're to assume that the info we were given before was incorrect, and that some of the post-output of the BBCs overlaps (frequency-wise) with OTA?

I was under the impression that the conflict area was between the LNB and the BBC... and that the BBC did something similar to a block-upconvert, and that the 'destination' frequency range was not in conflict with OTA.


Anyone have the actual frequency ranges?

#24 OFFLINE   carl6

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Posted 21 July 2007 - 09:41 AM

You need to understand the question to understand why the first answer was no. The question was if the OTA could be fed into the new multiswitch. The answer is no.


Agreed the answer to the original poster is absolutely no, as there is no ota input port on the new multiswitch.

However, along about post number 6, the conversation tended to change to the broader issue of diplexing as opposed to the specific question of the multiswitch (and it may be that the original poster was really trying to ask the more general question).

Thanks to harsh for noting the distinction in the original post.

I guess (and hope) we will know all the other answers in a couple of months.

Carl

#25 OFFLINE   carl6

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Posted 21 July 2007 - 09:43 AM

So I guess we're to assume that the info we were given before was incorrect, and that some of the post-output of the BBCs overlaps (frequency-wise) with OTA?

I was under the impression that the conflict area was between the LNB and the BBC... and that the BBC did something similar to a block-upconvert, and that the 'destination' frequency range was not in conflict with OTA.


Anyone have the actual frequency ranges?


You are correct. The frequency overlap is not an issue post bbc. The issue post bbc is how far you can separate the bbc from the receiver.

The intermediate frequency (output of the dish to the bbc) is 250 to 750 MHz. The bbc up-converts that beyond the ota range.

Carl

#26 OFFLINE   Meklos

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Posted 21 July 2007 - 07:10 PM

You are correct. The frequency overlap is not an issue post bbc. The issue post bbc is how far you can separate the bbc from the receiver.

The intermediate frequency (output of the dish to the bbc) is 250 to 750 MHz. The bbc up-converts that beyond the ota range.

Carl


OK that's what I suspected. So it's twofold:

1) Signal loss due to the fact that the BBC output is a much higher frequency, leading to increased loss per foot of coax...

and

2) BBC signaling failure due to "signaling" voltage or signal loss/corruption due to distance... the "signaling" being the control signals being sent from the receiver to the BBC.




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