[FADCA] (WARNING! SLIGHT BABBLING SEEN HERE) 802.11 a/b/g/n

[Evans F. Mitchell; KD4EFM / AFA2TH / WQFK-894]

802.11 B will do from 1 mip to 11 mip based on range
and reliability.
Use a Cisco 350 wireless bridge for comparison.
(350's are no longer in production)

I have worked with a setup of 2 Cisco 1300 units,
doing a 54 mips hop at TWELVE MILES LOS!......
(more info in the email)

Been doing a lot of work for Mosaic in the rf side of
802.11 and what a learning curve for me.... I will say
this, LOS makes a HUGE difference, and can make ones brain
overload with learning part 15.247 and keeping 802.11 in
the LEGAL area versus AMATEUR stuff....

ALSO, check Sean and Dave's website for some neat
2.4 info. www.fab-corp.com (shameless plug only because
they are my ISP also... www.citicom.com )

LAB SET UP
My lab was two 23.5 gain grids, 20' lmr-600, laptop with
a lucent tech 802.11B Gold card, 2 Cisco 1300 w/ external
ant. connectors. antenna alignment gear from Teltronics.

At 12 miles LOS (from Four Corners plant to a New Wales GYP
stack) with a noise floor at about 20% the alignment
transmitter pegged the needle at wide open gain.

HAAT was about 120 at 4 corners and the gyp stack was about
190 ( any one can GOOGLE map the distance and what not)
I will see about making a GOOGLE map point for those who
would be interested in the looks if you email me direct.


I could go on about this but with a radio that is able to do
54 mbps at 30 mW OFDM, 12 Miles blows the maximum computed
distance off the paper... which was 2.62 miles.
This was without the 1W amp being hooked up either!

(Now take into mind I was only using ping to load the link
between the root bridge and the non root bridge w/ a.p.
and was able to see 54 mips on the root side of the admin
web page. Setup was as follows: Vert polarized antennas;
1) laptop wirelessly to non root bridge with client access,
2) non-root bridge w/ c.a. to 23.5 gain parabolic set up
on a 7 foot 2" pipe shoved between tool box and tailgate
and 20 foot of lmr-400 for the test line, 192.168.200.101
3) Antenna pointed about 185 ~ 195 degrees to 4-corners
4) 23.5 gain paro at 4 corners on same pipe cut mounted
to handrail on north east corner of wash plant, above
flood lamps, lmr-400 at 20 feet for test line.
5) aimed about 25 ~ 35 degrees or towards Mulberry, Fla.
6) Teltronics 2445 GHz transmitter at 500 mW for signal
transmission to alignment receiver.
7) Cisco 1300 setup as Root Bridge unit. not connected to any
Ethernet source, only as a end unit. 192.169.200.100

I could pull up the admin page for the root through the
non-root (which was in my service truck) had me scratching
my head too, but I did 12 miles at 54 mips...)

***Root and non-root would not talk unless they link up***

BABBLE:
Other modes to GOOGLE: 1) CCK (1 to 11 mips) less 6 and 8
			     2) OFDM (6mips up to 54 mips)	

On chl 1, with this kind of horsepower we could almost
create a new linking layer with FPAC on 2.4. VoIP anyone?
I hear you Chuck, LOUD AND CLEAR... hummm try that with
a nextel radio or ........

Evans