[opendtv] Re: CBA and Microprose team up on NTIA DTV Boxes
- From: "Hunold, Ken" <KRH@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 21 May 2008 10:45:27 -0400
Sorry, I forgot the A-B switch. But at least that won't affect the
performance of the CECB. I wouldn't try to mess with a "combiner" for
all the reasons you mentioned.
Thanks,
Ken
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx]
On Behalf Of John Shutt
Sent: Wednesday, May 21, 2008 10:01 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: CBA and Microprose team up on NTIA DTV Boxes
----- Original Message -----
From: "Hunold, Ken" <KRH@xxxxxxxxx>
> If I "needed and desired" analog pass through, I could achieve that
> using any CECB and a splitter. No need to design a new unit that
> penalizes all viewers with the losses incurred by splitting the signal
> inside the box.
Tell me how to do that with a television with no line inputs, only RF
input.
There are more of those around than you might think.
For that case, you need an RF splitter feeding the input to the CECB and
one
input of an A-B RF switch, and then you'd need the output of the CECB
feeding the other side of the A-B switch. The output of the A-B switch
would then feed the television.
I suppose you could try to use a second RF splitter in reverse as a
combiner, but then you'd have the RF channel 3 output of the CECB put
back
into the input of the CECB, and also radiated out of the antenna. As
long
as the channel 3 didn't sensitize the receiver front end, it might work.
To
watch off-air, you'd just turn off the CECB.
John
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