Duane:
I want you to be my 2.4 GHz teacher and I will be an attentive student!
Seriously!!!
Cheers!
----- Original Message -----
From: "Duane" <[EMAIL PROTECTED]>
To: "Reza - Asterisk Enthusiast" <[EMAIL PROTECTED]>
Cc: <[email protected]>
Sent: Thursday, August 03, 2006 10:13 PM
Subject: Re: [on-asterisk] VoIP & Wireless - Antenna recommendation
On Thu, 2006-08-03 at 21:53 -0400, Reza - Asterisk Enthusiast wrote:
Hello Andrew!
Ok... I am inspired with this > 8KM link. Perhaps a laser pointer would
help you to aim in less time? Did you just put the antenna of the router
on
the LNB of the disk? Do you have any schematics/docs/journals that you
kept - with perhaps picture etc... of this pet project?
10km is pretty trivial especially if you have a GPS device, most
consumer grade laser devices don't go that far, although there is
hardware designs on the net for IR based 10M networking which is good
for about 1km...
The trick with any kind of distance is fresnel zone, not just line of
sight (reflection can cancel out your signal), and to allow for the
curve of the earth verse 2.4Ghz RF propagation (RF at 2.4Ghz is 4/3rds
that the curve of the earth etc etc etc)...
I loaded 3 degree NASA STSM data into nodedb.com and you can do rough
line of sight plots including inclination and azimuth etc, it's
currently based round google map point and click type stuff...
If you're truly interested in all this stuff I have a lot of useless
2.4Ghz facts in my brain left over from when I was playing with it in
2002...
--
Best regards,
Duane
http://www.cacert.org - Free Security Certificates
http://www.nodedb.com - Think globally, network locally
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http://e164.org - Because e164.arpa is a tax on VoIP
"In the long run the pessimist may be proved right,
but the optimist has a better time on the trip."
