IMO, it is "iffy" for the reason you mentioned. The FCC (at the request
of the FAA and the NTIA) appears ready to deny use of the 5.6 spectrum
in areas where interference with airport weather radar takes place. I
doubt that any WISP would ague that their use of that spectrum is more
important than safe operation of commercial aircraft. I expect that
newly certified 5 GHz equipment will soon (within the next year)
include a updated DFS algorithm that looks for the presence of 5.6 GHz
radar and switches away from 5.6 when radar is detected.
Your existing equipment may remain technically "legal" but you do run
the risk of possibly being blamed for aircraft crashes assuming you are
unlucky enough to be using 5.6 near airports where you could cause
actual interference to Terminal Doppler Weather Radar systems. See
<http://tiny.cc/LIlqB> for more information.
jack
Travis Johnson wrote:
It's "iffy" because the FCC allowed the specific band, and now they are
trying to take it back away... two years later. If I never upgrade my
radios, does that mean I'm legal to run in that specific band forever?
I just don't understand how they can allow it for 2 years, and then try
and take it away and think they are going to clean up the airways.
Travis
Microserv
3-dB Networks wrote:
Motorola Canopy 5.4GHz radios updated with the latest firmware cannot
transmit in the 5600-5650 part of the band.
I don't understand what is "iffy" about the band... Canopy operators have
been using it for two years or so now legally, and while DFS still has
issues in its current implementation, the FCC is working to make the DFS
detection better on the radio side and in turn make it harder to radio
manufacturers to allow clients to avoid using DFS
Daniel White
3-dB Networks
http://www.3dbnetworks.com
-----Original Message-----
From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
Behalf Of Jack Unger
Sent: Friday, November 20, 2009 11:02 PM
To: WISPA General List
Subject: Re: [WISPA] 5.6 GHZ?
5470 - 5725 is a legitimate band but DFS2 must be used on the radios.
There is currently FCC activity to modify the DFS profiles for all
newly-certified radios to avoid aircraft radar system in the 5.6 GHz
part of the 5470-5725 band. The bottom line is - it's pretty "iffy".
jack
Forbes Mercy wrote:
My new MIMO radios have 5.6 GHZ on them, I don't recall that frequency
being available in the US. Is it?
Forbes
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--
Jack Unger - President, Ask-Wi.Com, Inc.
Author - "Deploying License-Free Wireless WANs"
Serving the Broadband Wireless Industry Since 1993
www.ask-wi.com 818-227-4220 jun...@ask-wi.com
Sent from my Pizzicato PluckString...
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