[opendtv] Re: Broadcasters Nix Low-Power DTS Proposal
- From: "John Shutt" <shuttj@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Tue, 2 Feb 2010 17:18:09 -0500
----- Original Message -----
From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
Might have something? What, for instance? I'm really curious. Leaving
aside the simplistic and erroneous notions of SFNs (they are sort of like
a cellular structure), what perceived advantages are there to large area
deployments of many low power sticks in SFNs? With the understanding, of
course, that you won't allow gaps in coverage between markets, but rather
must support some amount of overlap in the fringe zones (because people in
these parts may spend most of their waking hours in either of the adjacent
markets).
Not every market has a Mt. Wilson. Case in point is our own market. Sticks
are all over the compass, separated by 25-30 miles in some cases. So
viewers can't park a single antenna in one location to get everyone. Power
levels are all over the place as well, causing lower power stations (us) to
get front end loaded right out of viewers' homes who happen to live closer
to a 3rd adjacent running 9 dB more power than we are allocated .
Craig's Spectrum Utility model would have co-located transmitters at matched
power levels, allowing closely spaced channels to operate the same in every
corner of the market. Ditto with co-located gap fillers or an SFN. They
would be co-located, power matched, and look more like a cable television
signal to the receiver's front end.
John
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