I'm purely speculating here, but my thought is that somehow there may
have
been a solar flare or storm sometime during the day and the resulting
interference reached us at the times you have all mentioned. The
interference could have been just weak enough that unless a particular unit
had enough gain and or antenna positioning to capture the signal it would
not bother particular units in the field while others experienced problems.
Scriv can probably attest to the sunspot activity and the problems from his
cable TV days on their satellite downlinks. The sun is a broadband
transmitter of noise, sometimes the signals are organized and powerful
enough to bother our terrestrial systems. While it is true that the greatest
and most common effects are in the VHF and shortwave ranges it is not the
only frequency range to experience problems.
In thinking about the thermal "ducting" that can happen with signals, I
think with this problem it is unlikely since those situations are usually a
localized event at higher frequencies. An alternate explanation could be a
problem with firmware that might be aware of date and time which popped up
as a bug. I'm not that knowledgeable in Trango gear to know if the units are
time synchronized to anything for this to be a possibility.
Thank You,
Brian Webster
-----Original Message-----
From: David E. Smith [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 02, 2005 1:28 PM
To: wireless@wispa.org
Subject: RE: [WISPA] 5.8 GHz PtP - weaker RSLs
On 2 Aug 2005 at 12:56, Brian Webster wrote:
> Since different people saw the same problem in multiple locations I would
> suspect a propagation problem, probably as a result of solar activity.
While possible, there's one thing that just makes that sound really weird.
We're using Trango gear as well, and (as Scriv mentioned) saw some similar
problems last night...
One of our Trango APs has two client SUs associated. Both links are about
nine
miles, but the endpoints are only about three miles apart, on the same state
highway. Think of it as a "V" shape, where the AP is at the bottom of the V.
And the V is actually pointing west-to-east. But whatever.
One of those links went completely bananas, lost about 10dB of signal,
dropped
connection all over the place. The other didn't skip a beat.
I have another, similar, link that did the same thing last night. One AP,
three
SUs. One went bonkers, the other two were things of beauty and perfection.
Again, the endpoints are only a couple miles apart.
[newbie mode ON!]
Is solar flare activity really sufficiently "random" that this is plausible?
With clients on the same frequency, and so relatively close together, I'd
expect any really broad-scale interference to knock them all off at the same
time, instead of just doing so randomly.
David Smith
MVN.net
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