Could also use a 2-way splitter, and only lose about 3db. Then put two
up with an ABAB configuration. You'd still be using 2 APs, but the
performance would be quite a bit better.
bp
<part15sbs{at}gmail{dot}com>
On 11/22/2016 7:24 AM, Adam Moffett wrote:
Maybe he's the one guy with no noise in 900mhz. We don't know that
from back here.
You could use a cheaper V+H antenna on the AP as long as you use V+H
antennas on the CPE.
You could also build an array of four sector antennas with a four-way
splitter. You lose at least 6db on the splitter, but if you're
looking at 5dbi and 7dbi omnis then it's probably in the same
ballpark. The good thing is you could set a different tilt angle in
different directions and if load required it in the future you could
go to two 2-way splitters and two APs.
------ Original Message ------
From: "Kurt Fankhauser" <[email protected]
<mailto:[email protected]>>
To: [email protected] <mailto:[email protected]>
Cc: [email protected] <mailto:[email protected]>
Sent: 11/22/2016 10:12:13 AM
Subject: Re: [AFMUG] Dual-slant 900mhz omni (for PMP450) ordering group
You are wasting you time with omni's on 900mhz. So your sacrificing a
lot of gain to get 360 degree coverage which in turn will result in
higher overall noise floor and lower signal when this 450 product
really starts to shine you need 25db+ SNR at the client side to get
the higher modulation connections. So even if you got the Omni you'd
going to be lucky to get 8-10db SNR to the client which means your
only going to be running at 2x speed and getting 10mbps download
which will probably be intermittent. I had a lot of omnis on FSK 900
and I can tell you that after having used the cambium slant sector on
450 I am a firm believer in sectors only for 900 from here on out. I
have connections that are 3-4 miles out running 10mhz channels and
getting 40mbps down/10mbps up. You will never get that with an Omni
unless you have LOS and if you have LOS then why aren't you using
another frequency band?
On Tue, Nov 22, 2016 at 2:03 AM, Colin Stanners <[email protected]
<mailto:[email protected]>> wrote:
I've been looking for dual-slant 900mhz omni options that would
allow lower-cost PMP450 900mhz deployment on middle-of-the-woods
towers where there are only a small number of customers (and low
noise). I know that "omnis suck compared to sectors", but having
nothing at all sucks more. Due to the difficulty of designing
dual-slant antennas and the small market, options are very few.
Commscope has the CH360QS, only 5dbi gain at ~900mhz... and it's
a cellular base station omni with all the fancy doodads:
1800-2200Mhz band that WISPs can't use, internal GPS antenna,
internal diplexer, remote-controlled signal tilt on the upper
band, etc. ////At $3500 per antenna I hope that it makes your
breakfast too.
Alpha has the best design that I found at present, the AW3464.
~7dbi gain http://alphaantennas.com/products/small-cells/aw3464/
<http://alphaantennas.com/products/small-cells/aw3464/> . It's
~$1200 USD which is still inexpensive compared to any other NLOS
options.
But currently those antennas cannot be bought - I spoke with
Crossover Distribution and Alpha, they haven't received enough
POs to make a production run, need 50 orders at a bare minimum.
So if anyone else is really interested in one or more of these
antennas, ready to buy for sure if they are available, e-mail me
"If available, I will buy x number of the Alpha AW3464 at
$1200/USD each from Crossover." and I'll make a list, once it
hits 50+ antennas I'll speak with Crossover and see if it can happen.
