[opendtv] Re: CBA and Microprose team up on NTIA DTV Boxes

  • From: "John Shutt" <shuttj@xxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Wed, 21 May 2008 10:01:20 -0400


----- 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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