I'd like to go back to the specs on different radios just so I can compare for myself...

Trango 2.4ghz:
5Mbps auto ratio
8 non-overlapping channels
10mhz spectrum per channel
-90 Receive level
15 mile range (without a grid)
External connector and dual-pol integrated antenna
$879 AP (WISP price)
$479 SU (WISP price)

Canopy 2.4ghz (regular):
7Mbps fixed ratio
3 non-overlapping channels
20mhz spectrum per channel
-86 Receive level
5 mile range (without a dish)
$902 AP (reseller price online)
$490 SU (reseller price online)

Based on the information from Mike, I could not use Canopy. In several areas, I have 4-5 towers located within 5 miles of each other.... how do I do that with Canopy? With Trango, I use a different channel for the sector pointing toward another tower (frequency planning and coordination is very important) and everything works great. Is there a solution for this with Canopy?

Also, by using only a 10mhz spectrum per channel, Trango's channel 1 and channel 8 are actually outside the reach of Canopy and 802.11 (for the most part) and thus can almost always be used in a noisy environment.


Mike Bushard, Jr wrote:
Well, so far as we can tell the only thing that can kill canopy, IS CANOPY.
We have put it up against WaveRider, Alvarion, and 802.11b. They all fell of
the face of the earth. 

We have 16 tower sites deployed, all 900Mhz and 2.4, over 1000 CPE and more
on the way. (I realize there are many people bigger than us.)

We use a mix of MTI Omni's, MTI or Tiltek 120deg Sectors (MTI for Horizontal
and Tiltek for Vertical) and integrated 60deg sectors (I really wish someone
would come out with a descent H-pol as I don't like the integrated antenna)
with 900. Cyclone Omni's or 120deg sectors on 2.4.

Here is what I have found with GPS Sourced Sync vs. Generate Sync:

If you want channel reuse you need GPS sourced sync.
If you have a tower more than 8 miles away, you need to use different
channels no matter what, even with GPS sourced sync you still have speed of
light issues from tower to tower.

Can you Generate sync and deploy multiple AP's in a given area, yes. You
just need to make sure you have Frequency separation. Does this mean I
recommend it, NO.

Also even with every site GPS Synced, you still can only put so many AP's in
a given area be for you need to go to a different polarity. At least we know
there will never be another 900Mhz based ISP in one of our towns.....

Also on a side note, I have never found a problem with 2.4, it is 900 that
will give you problems, it just carries so far. If the noise floor was
lower, and Canopy could run at -90 we would have coverage for a long ways.
It seems like we can always pick up a AP at -80.


Mike Bushard, Jr
Wisper Wireless Solutions, LLC

-----Original Message-----
Behalf Of Matt Liotta
Sent: Monday, September 25, 2006 5:07 PM
To: WISPA General List
Subject: Re: [WISPA] vendor specs -- Jon

Patrick Leary wrote:
I'm speaking about multipoint matt, not ptp. The dedicated ptp you are
doing is by far the exception. Canopy is designed, built, and sold to be
primarily a pmp system. I've never met or heard of a Canopy pmp network
of any scale that did not require GPS.

I'd be interested in further explanation on this topic. We have some 
Canopy pmp and haven't found the lack of GPS a problem. Granted we don't 
have a large amount of pmp, but I would certainly like to understand any 
future pain before we experience it.


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