We're all H pol on our 900. Wasn't the old integrated SM was H pol as
well? Nearly all of the SCADA stuff out there is V pol.
Slant gets you 3dB from H or V polarized systems. That's not a whole lot
of rejection. Like I said before, slant should get you better
equalization on the two paths so that it's not constantly running
MIMO-A. But if it's so noisy that you get maybe 10dB SNR, OK, so that'll
be 1X MIMO-B, basically not any better than FSK.
On 10/14/2015 11:24 AM, Daniel White wrote:
I’m sure Matt will post in detail their reasoning for dual-slant next
week, but to sum up it was to get rejection from V-Pol and H-Pol
signals since the band is probably 100% linear polarized.
I was shocked to hear Matt tell me though that many FSK customers are
using Vertical Polarity. I thought everyone did Horizontal, but maybe
that was just the way my WISP did it.
Thank you,
Daniel White
[email protected] <mailto:[email protected]>__
Cell: +1 (303) 746-3590
Skype: danieldwhite
Social: LinkedIn <http://www.linkedin.com/in/danielwhite84>: Twitter
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*From:*Af [mailto:[email protected]] *On Behalf Of *George Skorup
*Sent:* Tuesday, October 13, 2015 3:49 PM
*To:* [email protected]
*Subject:* Re: [AFMUG] PMP 450i 900 MHz SM
I would rather have the style we're used to: MCX to N-male pigtails
coming out of the bottom of the case. However, if you saw their
dual-slant yagi which has two RP-SMA connectors on it and a provision
for mounting the SM to the back of it, I can see why they're coming
out of the top. The folded dipoles do not have a radome. They will ice
up and be worthless. Again, I would much rather have an integrated panel.
Their choice to do dual-slant.. we'll see how that goes. Makes all
existing antennas obsolete. I'm a little disappointed since it'll be
10x as hard to convert a 4x90 FSK site.
The -6dB 65 degree sectors drive me nuts. There's 26MHz to play with
and you can count on the top being trashed, then cordless phones and
baby monitors all throughout. There's no way in hell we could ever use
six sectors at a site. 90 degree sectors allows you to move around in
the band a little bit. So I hope they come up with some 90's.
On 10/13/2015 5:24 PM, Brian Sullivan wrote:
Is the design of the module final?
I'd rather see integrated cables or those pesky RF connectors
underneath a cover to avoid water.
Will Cambium be including RF cables with each SM?
Also, the specs say 100M throughput in a 20MHz channel. What is
the throughput running in 1x or 2x?
450 + ePMP love child.
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