Mmm let me guess, he started with ....wavelan or probably lucent Orinoco
ended up with Trango and / or Canopy before he sold out... for Millions!

I started with Raylink... ended up with Canopy

Gino A. Villarini, 
Aeronet Wireless Broadband Corp.
[EMAIL PROTECTED]
www.aeronetpr.com
787.273.4143


-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Kurt Fankhauser
Sent: Wednesday, January 18, 2006 3:12 AM
To: 'WISPA General List'
Subject: RE: [WISPA] Multiple Radios on Single antenna

Charles,

What equipment did you use to build up your WISP? Also what did you
start with and what did you end up with?

Kurt Fankhauser
WAVELINC
114 S. Walnut St.
Bucyrus, OH 44820
419-562-6405
www.wavelinc.com


-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Charles Wu
Sent: Tuesday, January 17, 2006 6:55 PM
To: 'WISPA General List'
Subject: RE: [WISPA] Multiple Radios on Single antenna

Hi,

I would recommend that you do some research on the terms "dynamic range"
and
"front-end compression" as it relates to your particular hardware /
radio
platform.  Understanding those terms / concepts will give you the
understanding you need to make your "homebrew" system work

Otherwise, if you want to just "plug and pray" your network -- you're
better
off probably just buying quality name brand products that have enough
built-in "safeties" to let one just mindlessly deploy

-Charles

P.S. -- although I happen to have an understanding of Rf theory, HAM
stuff,
and Radio engineering, when I ran my WISP, I found that in the long run,
it
made better business sense to subscribe to a "lazy" WISP "plug-and-pray"
mentality due to the fact that I liked knowing that I could focus my
core
efforts on sales, marketing and customer service.  From a deployment
side, I
could just put some stuff up and have the ability to blame all my system
mishaps on my friendly manufacturer / vendor =)


-------------------------------------------
WiNOG Austin, TX
March 13-15, 2006
http://www.winog.com 



-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Bob Moldashel
Sent: Tuesday, January 17, 2006 6:25 PM
To: WISPA General List
Subject: Re: [WISPA] Multiple Radios on Single antenna


Ahhhhh......Lets do some math.......

Lets say the radio has a +20 dB output.  For this example there is no 
line loss.  The antenna is rated at 30dB x-pole isolation.  Here we
go...

+20 dB
-30dB xpole
=
-10 dB receive level. 

In my book that is high enough to kill any link of the same freq on the 
opposite polarity....No???

Add to that a radio that needs to Rx and Tx on and off and you should 
have receiver blocking....... 

-B-




Matt Liotta wrote:

> Depending on various factors, you should see at least 15db of
> attenuation between polarizations on a dual-pol antenna. 
> Theoretically, you should see 20db. In any case, 15db is enough 
> attenuation even on the same channel to operate two links reliably.
>
> -Matt
>
> Jason Wallace wrote:
>
>> List,
>>
>> When antennas are separated by normal distances, they can only "see"
>> each other electromagnetically (ie, radio waves).  However, when they

>> are close they will experience capacitive and inductive coupling.  
>> Dual pol antennas work fine when only receiving (as in those large 
>> satellite dishes from the 80's that used 90° pol changes between 
>> adjacent channels).  I think you will always have trouble overloading

>> the receiver when transmitting with this setup.
>
>
>


-- 
Bob Moldashel
Lakeland Communications, Inc.
Broadband Deployment Group
1350 Lincoln Avenue
Holbrook, New York 11741 USA
800-479-9195 Toll Free US & Canada
631-585-5558 Fax
516-551-1131 Cell

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