[opendtv] Re: Satellite radio
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 24 Sep 2007 22:28:03 -0400
At 10:08 AM -0700 9/23/07, johnwillkie wrote:
XM's LA-site-number 2 is atop Mt. Wilson, where I've seen the equipment, and
I don't mean from the outside of the building. They're in the same building
that houses KCET, the southern-most one.
5800 feet elevation amsl. With satellites and this boy, they still needed
illegal transmitters. Not exactly a ringing endorsement of COFDM or SFNs.
What has this got to do with COFDM or SFNs?
Satellites cannot overcome terrain blockage.
How is it that car radios work in the Lincoln and Holland tunnels in NYC?
Every transmission medium needs help to overcome its inherent
physical limitations. That help is typically associated with
economics (hence the concentration of terrestrial satellite radio
helpers) or a perceive public safety issue (hence the retransmission
of radio broadcasts via "leaky cables" in the tunnels).
Regards
Craig
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