Here is a weird on to throw in there. I had a sub tell me last week
that every time they shoot the shuttle into space it screws up the
weather. Could it be an after effect from the shuttle going through
the atmosphere and into space? Brian Webster wrote: 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 -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ |
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