I’ve had a problem that comes and goes similar to yours except it’s also the signal level on one polarization also drops like 20 dB and then after a few hours or days it comes back. Changing software didn’t help. This started after we replaced one end of the link due to lightning damage. I realize my problem isn’t exactly the same as yours, but still, my guess is you will end up replacing one of the radios. Maybe replace both ends in case there was a manufacturing issue around that time. AF5X aren’t that expensive, maybe safer to just replace them both.
From: AF <[email protected]> On Behalf Of Mark Frost Sent: Tuesday, November 6, 2018 5:01 AM To: AnimalFarm Microwave Users Group <[email protected]> Subject: Re: [AFMUG] AirFiber 5X Oddity Hi Jeremy and Colin, Thanks both for your input. We did change the channel during one of the events and the problem persisted. From memory (I’ll have to check with others), it fixed it for a minute or two then started again. I agree that its worth a firmware upgrade. Having said that, it seems odd that if it was a firmware issue, it would start out of the blue after a couple of years? Cheers, Mark From: AF <[email protected] <mailto:[email protected]> > On Behalf Of Jeremy Sent: Tuesday, 6 November 2018 14:00 To: AnimalFarm Microwave Users Group <[email protected] <mailto:[email protected]> > Subject: Re: [AFMUG] AirFiber 5X Oddity Sorry, missed the line that you had already tried switching channels. Maybe firmware?? On Mon, Nov 5, 2018 at 8:58 PM Jeremy <[email protected] <mailto:[email protected]> > wrote: I see this with interference (even though the noise floor doesn't seem to go up). I would run a scan and see if switching channels helps. Also,try upgrading to 3.2.1 on both sides On Mon, Nov 5, 2018 at 8:56 PM Colin Stanners <[email protected] <mailto:[email protected]> > wrote: That is strange. Was the channel switching done during one of the events? Did the radio come back still at the low modulation? On Mon, Nov 5, 2018, 9:36 PM Mark Frost <[email protected] <mailto:[email protected]> > wrote: Hi All, We’re experiencing a very weird and very intermittent issue with an AirFiber 5x Link. For the past few weeks, we experience a one way drop in modulation – all the way down to 1/4x (QPSK). This occurs at random times of the day or night, lasting between 5 minutes to 2 hours, and then fixes itself. It occurs randomly from one to three times in a 24 hour window on average, and doesn’t seem related to traffic load. The link has been in and operational for the best part of 2 years with no problems whatsoever. The path is 14.2KM (~9mi), 600mm dishes (45deg offset ones) operating on a 30MHz channel and holds 64QAM. We’ve tried moving channels but that hasn’t helped. The signal on both chains (1 and 0) at both ends doesn’t change at all during the event (between -60 and -58 across all). There is no environmental changes during these events (such as rain, etc). I’ve spent hours reading the ubiquiti forums, and I’m still at a loss as to what could cause the issue. We are operating on old firmware, and I did see one post mention that the duty cycle was incorrect in a firmware revision (we run at 50/50) but that seems very anecdotal. Our only option at this stage is to replace the units. I’m guessing it’ll need to be both ends, as we don’t know if its RX on one unit or TX on the other. I just thought I’d check in on the off chance anyone may have a suggestion before we go climbing… Cheers, Mark -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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