On Tue, Jul 09, 2002 at 04:39:38PM -0400, Russell Nelson wrote:
> John Koenig writes:
> >
> > So is this old news... hence why no one is commenting on it?
> >
> > http://www.motorola.com/canopy/
>
> It sure looks pretty darned reasonable. Not obvious if it uses a mesh
> architecture, but it sounds like it does from the little I've read.
Not sure how they have changed lately. The ones I used about a
year ago were point-to-point and point-to-multipoint. The last I
heard on prices that onesy prices where about $2K. Of course if
you bought more that price would drop. The modulation is BFSK and
it may have a bit more distance but it won't die gracefully unless
it rolls back to other modulation schemes. When I was setting them
up, they spec'ed them out at 2 miles point-to-multipoint.
How they get the guys to do 20 miles is put the units at the foci
of a dish. They have a mount that sticks them in front of what
looks like a DirectPC sized disk. Unfortunately they don't give
much detail on the size or gain of the dish, RX sensitivity or EIRP
of the basic unit to design the path to know beam width, fade
margins, etc.. Perhaps Dewayne has more details has he has been
working with them.
Tim
--
Snail: Tim Pozar / LNS / 1978 45th Ave / San Francisco CA 94116 / USA
POTS: +1 415 665 3790 Radio: KC6GNJ / KAE6247
"It's a damn poor mind that can only think of one way to spell a word."
- Andrew Jackson
"What is wanted is not the will to believe, but the will to find out,
which is the exact opposite." - Bertrand Russell, "Skeptical_Essays"
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