with sites that have 10 users in a 15 mile RADIUS, you have to have an amp....
marlon

----- Original Message ----- From: "George Rogato" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Sunday, February 04, 2007 11:51 AM
Subject: Re: [WISPA] Typical OFDM CPE antennas


Amps?

The success of G is less noise and less power. IMHO

Never looked for a G amp or tried a G high powered card.


Marlon K. Schafer wrote:
Has anyone found an amp that'll work CORRECTLY with g AND b?
marlon

----- Original Message ----- From: "George Rogato" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Sunday, February 04, 2007 11:21 AM
Subject: Re: [WISPA] Typical OFDM CPE antennas


Nothing scientific Mac, but I think lots of G ap's work better than lots of B ap's.

Seems when I've seen high powered B ap's in the mix there can be issues. Where as when I see only low powered G things still work.

The area I cover is fairly small, so i'm getting densly built out with omni's and sectors all over the place.



Mac Dearman wrote:

How are y'all running "G" in so many places? I would love to implement G,
but I have so many towers sectored out and then we have so many clients
running wireless routers close to the CPE that I feel like there would be
trouble in Paradise here!!

 Are any of you running G on anything but an Omni antenna? (Multiple
antennas on one tower?)

Mac



-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Lonnie Nunweiler
Sent: Sunday, February 04, 2007 12:30 PM
To: WISPA General List
Subject: Re: [WISPA] Typical OFDM CPE antennas

Totally agree.  A bad G link will still give as good as a GOOD B link.
 G will give 5 mbps even when it is close to not connecting and B
requires superb signals to get 5 mbps.

Lonnie

On 2/4/07, George Rogato <[EMAIL PROTECTED]> wrote:

I have quite abit of G out there. All the clients and ap's I install
today are G.
60's is great, 70's work just fine too.
60's get top performance, 70' is still a great very fast connection and
even low 80's beat B.

B stands for Bad
G stands for Good





Marlon K. Schafer wrote:

It's not about antenna size.  It's about signal levels.

Most g radios need -60ish signal levels to work well. Use the antennas
that you need to make it work right.

Find the sensitivity levels of the product you are using, run the calcs,
and compute a 10 dB or so fade margin.

laters,
marlon

----- Original Message ----- From: "Tom DeReggi"
<[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Saturday, February 03, 2007 12:38 PM
Subject: [WISPA] Typical OFDM CPE antennas



I wanted to get some feedback from the List.

Typically, what Dbi gain antennas are you desiring for OFDM short
Near-LOS or Mid-range CPE links?
Is 18 dbi enough?

I'm well aware that 18dbi will not be good for many applications (long
range or noisy), but what percentage of CPE installtions would it be
good for?
Could 75% of the CPE installs be acheived with 18dbi?

I personally, would pick a 21-23db antenna as a preferred choice, but
PacWireless Rootennas are 19dbi, and often used with 13-15 dbm CM9
cards. The beamwidth of 18dbi (< 20-30 degrees) is pretty good for
interference resilience and OFDM maximized, and if more gain was
needed it could be accommodated with higher power radios such
Teletronic's >18dbm Atheros cards or Ubiquiti's SR5 18-26db cards.

Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband


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