[opendtv] Re: News: FCC Floats Cash-For-TV-Spectrum Scheme
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Fri, 30 Oct 2009 15:01:28 -0500
Craig Birkmaier wrote:
> The input power levels for the big sticks are still huge
> compared to what a properly designed SFN would consume.
Not "huge" necessarily at all. Just somewhat bigger. And they are balanced by
the difficulty in achieving ubiquitous coverage with the SFN, and the manpower
required to keep the extra towers going.
For example, the 30 towers of that Qualcomm Ch 55 net between Wasg DC and NYC
were medium power, 50 KW each. 30 * 50KW = 1.5 MW ERP.
That same chunk of East Coast is otherwise covered by 4 big stick: DC, Balt,
Phila, NYC.
So the comparison is at worst 4 MW total vs 1.5 MW total, and the Ch 55
coverage was more spotty than the big stick coverage. It did not go much beyond
the I-95 and US 1 corridor, once outside of the major urban areas.
Bert
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