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]> 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] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
-- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
