I have heard that, but in this case every AP another one can see,
regardless of frequency shows the same numbers at the same time. It
looks more like a broad spectrum something, though it could be frequency
hopping, I suppose. Wish I had a good spectrum analyzer.
I may be putting 2.4 on at least one of these and just shorten the
effective range.
On 2/5/2011 12:23 PM, Justin Wilson wrote:
900 is voodoo anyway. Notch filters are almost a necessity these
days with 900.
--
Justin Wilson <[email protected]>
Aol & Yahoo IM: j2sw
http://www.mtin.net/blog -- xISP News
http://www.twitter.com/j2sw -- Follow me on Twitter
Wisp Consulting -- Tower Climbing -- Network Support
From: Chuck Hogg <[email protected] <mailto:[email protected]>>
Reply-To: WISPA General List <[email protected]
<mailto:[email protected]>>
Date: Sat, 5 Feb 2011 11:51:16 -0500
To: WISPA General List <[email protected] <mailto:[email protected]>>
Subject: Re: [WISPA] 900MHz noise
Something is frequency hopping, maybe RTK (John Deere, find the
offender and work with them to have them skip your frequencies), Water
Department SCADA (MicroHard sells one that does this to us, gotta
reconfigure them to skip your frequencies), Electric Smart Meters
(your screwed if this is it)... You might be able to move to horizontal?
This is another reason I don't use MT/UBNT 900 any longer, the Canopy
can operate with a noise level of -70 fairly well.
Regards,
Chuck
On Sat, Feb 5, 2011 at 8:22 AM, Scott Reed <[email protected]
<mailto:[email protected]>> wrote:
I just put up a couple of new towers with MT/XR9 based APs. When they
went up about 3 weeks ago, everything was good. Signals were good.
Noise level in the 90s. Customers worked well.
Yesterday we were at a customer that has been problematic for 2
weeks or
so. Connected to the radio with power from the truck and the network
was great. Didn't really look at noise levels, but signals were good.
Connected the customer back up and no go. We found a power supply
problem and then checked for the signals again. OH NO, it won't stay
connected. Did a scan. Noise cycles over about 8 seconds like
this: 93
85 70 50 65 70 85 95
So this morning I ran scans from 2 other towers with XR9 APs.
They are
doing the same thing. Direction doesn't seem to matter, but I did not
leave APs in scan mode with customers down long enough to get good
numbers based on direction.
Any suggestions as to what I am looking for?
--
Scott Reed
Owner
NewWays Networking, LLC
Wireless Networking
Network Design, Installation and Administration
Mikrotik Advanced Certified
www.nwwnet.net <http://www.nwwnet.net>
(765) 855-1060
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--
Scott Reed
Owner
NewWays Networking, LLC
Wireless Networking
Network Design, Installation and Administration
Mikrotik Advanced Certified
www.nwwnet.net
(765) 855-1060
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