[opendtv] Re: SFN response to Craig's post
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 26 Apr 2007 12:24:12 -0400
Craig Birkmaier wrote:
> One approach is to use one high powered stick and gap fillers
> to serve areas where it is difficult to receive the big stick.
> In this case you "may" be able to receive the signal from the
> big stick from distances comparable to NTSC/ATSC big sticks
> today.
You will be able to, unless someone has located a too powerful gap
filler too far away from the big stick.
> A second approach is to place 3-5 medium powered transmitters
> around the market being served.
Only works reliably if the towers are all within the GI. Otherwise,
you'll get interference in many locations, which may then force you to
add even more towers, and end up creating the forest. And medium power
and possibly low HAAT will certainly work against long distance
reception.
> Typically a receiver will "see" more than one of these signals,
> and in the case of DVB-T the power from these signals may add
> together to improve reception.
This is true for any receiver with a decent equalizer. That's what
equalizers do.
Bert
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