We had one site up trying to get through trees, only about 1/2 mile. We
pulled that one down. We have another up that is in a very tight
subdivision, so 2.4 was out of the question from all the wifi crap.
There are currently two SMs on it (Cambium 90 sector on a 50' ), both on
reflectors through some trees. One is at 0.29 miles with a -56dBm, the
other at 0.35 miles with -61 to -70 (probably trees blowing in the wind).
Like Ken said, when the trees are wet, forget it, they drop out. You
narrow the beamwidth with a reflector and the signal usually gets worse
when going through trees. And the internal patch antenna is usually too
wide and too low gain, depending on how close the trees are. If there
was a middle-ground in gain/beamwidth like a 30-degree integrated panel
SM, I might be able to live with it. I'm not going to spend a bunch of
$$ on connectorized SMs and $100+ panel antennas for nearly every
install. At this stage, trying to use the 3GHz 450 for true NLOS is
stupid, it's too expensive. I see it as just another caliber in the LOS
arsenal.
On 9/21/2014 3:28 PM, Bill Prince via Af wrote:
If you need it to go through trees, you will probably be
disappointed. It will certainly penetrate better than anything in 5
GHz, but it won't be as good as 2.4 GHz, and it will be a lot worse
than 900 MHz. That's just physics.
But the noise floor will be a lot better than either 900 MHz or 2.4
GHz, and that may mean some salvation, simply because of the resulting
effect on SNR.
bp
On 9/21/2014 11:21 AM, CBB - Jay Fuller via Af wrote:
Surely ppl using 3.65 are going through trees ?
Sent from my Verizon Wireless 4G LTE Smartphone
----- Reply message -----
From: "Ken Hohhof via Af" <[email protected]>
To: <[email protected]>
Subject: [AFMUG] 3.65 pmp450 results - was Dear Cambium
Date: Sun, Sep 21, 2014 12:14 PM
We did a bare SM the other day 0.6 miles –58 and 8X in a 10 MHz
channel, that tells me we can go a lot farther without a dish,
probably 1.5 miles or more. Or are you talking about through trees?
I have not been impressed with performance through trees, even with a
dish. But I’m not happy with –80 and 4X, I don’t want to eat up all
the capacity on such an expensive piece of gear with just a few
subs. And I don’t want customers calling every time the leaves get
wet or covered with snow.
At some point I think we’ll see something similar to the Force100 but
for now it’s a dish or a connectorized SM with a panel. When I asked
about a Stinger/CLIP type of product, I was told the size at 2.4 or
3.65 GHz get too big or else the gain isn’t worth it.
*From:* CBB - Jay Fuller via Af <mailto:[email protected]>
*Sent:* Sunday, September 21, 2014 11:58 AM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] 3.65 pmp450 results - was Dear Cambium
We didn't get very far without a dish ; what are you seeing in terms
of how far you can get before you have a dish?
Are you using a dish with most, or is there a stinger available or
something "mid-term" ?
Must be honest, we haven't tried the dish yet. Need to very soon as
fall is basically here...
----- Original Message -----
*From:* David Milholen via Af <mailto:[email protected]>
*To:* [email protected] <mailto:[email protected]>
*Sent:* Sunday, September 21, 2014 11:34 AM
*Subject:* Re: [AFMUG] Dear Cambium
Chris,
We are rockin 3.65 450 AB channels replacing 90% of our 900 subs.
Migration is taking time due to cap X.
I took down our first 900AP which was our first aP900 installed
last week.
On 9/19/2014 4:34 PM, Christopher Tyler via Af wrote:
I love the 450, 450 is awesome, but 90% of our subs are on 900 MHz, what do
we do there, where is our upgrade path, what is the replacement for PMP100 in
900 MHz?
We have no alternative to 900 for most of our customers where we are, too
many hills and trees. We are still deploying 900 MHz radios in large
quantities simply because we can't use anything else. Sure would be nice to
have an easy way to configure those radios, we (Animal Farm) have only been
asking for that feature for the last 8 years, not like they didn't know about
it or have the time to figure it out. Now they are giving it to us, but only
on a platform where we don't really need it yet.
While I understand that PMP100 is somewhat antiquated, Cambium is still
making money on it and will continue to make money on it, so why not give us at
least some development beyond bug fixes at least until there is a 900
replacement? Why not a 450 in 900 MHz that's using the newer hardware but
still only 2x modulation. We would literally buy thousands of them within the
next year.
--
