Yes it's clean, only a tiny -85 carrier (link is -38 RSL) but I am starting to think that maybe the interfering carrier is not being detected by the radios integrated spectrum analyzer... Might need to do a secondary scan with an external device.
around the time the radio started having issues the FBI installed some type of equipment on the same site, not sure if it is related but it looks like two sector antennas for land mobile radio? And also a 7ghz cambium link. I haven't had any luck in locating these transmitters in FCC ULS. On Wed, Jul 23, 2025, 1:04 PM Josh Luthman <[email protected]> wrote: > Did you do a spectrum scan? > > On Wed, Jul 23, 2025 at 3:55 PM TJ Trout <[email protected]> wrote: > >> Also only one side receiver is showing errors but the modulation is >> affected in both TX directions. SNR and RSL remain unchanged since install! >> >> On Wed, Jul 23, 2025, 12:53 PM TJ Trout <[email protected]> wrote: >> >>> So this 6ghz link is still acting up, connects at 4096 qam and >>> demodulates to each lower order modulation step by step about every 1 >>> second, once it reaches the lowest modulation it drops connection and >>> immediately repeats the same behavior again. I've replaced both radios and >>> performed spectrum analysis and found no interference. One side we replaced >>> the DC power supply and the other side has many links but this is the only >>> link misbehaving. >>> >>> Working with the mfg (aviat) but even they seem baffled at this point. >>> >>> Link was installed 5 years ago and performed flawless with no >>> configuration changes since installation. >>> >>> Maybe the borg can help? >>> >>> On Wed, Jun 18, 2025, 10:15 AM Ken Hohhof <[email protected]> wrote: >>> >>>> Unlikely, but something that occurs to me is that if I remember >>>> correctly, unlicensed 6 GHz CPE radios are allowed to transmit at +30dBm >>>> EIRP while trying to contact the AFC, and then at +36dBm if given >>>> permission by the AFC. So it’s not like they can’t transmit at all without >>>> OK from AFC, or are limited to very low power like indoor CPE. >>>> >>>> >>>> >>>> I think they first need to see the AP, which needs AFC permission, so a >>>> total screwup seems unlikely. >>>> >>>> >>>> >>>> *From:* AF <[email protected]> *On Behalf Of *Eric Nielsen >>>> *Sent:* Tuesday, June 17, 2025 7:33 AM >>>> *To:* AnimalFarm Microwave Users Group <[email protected]> >>>> *Subject:* Re: [AFMUG] 6ghz (lower) interference >>>> >>>> >>>> >>>> Send me a PM with the coordinates and/or callsign of the receiver >>>> that's getting the interference. I'll run the site and tell you if I see >>>> anything in the general area that could be suspect. >>>> >>>> If the link continues to receive interference, like others said, you >>>> should run a frequency scan to identify the interfering emission and its >>>> bandwidth. If the bandwidth is 40, 80, or 160 MHz, that's probably >>>> unlicensed. >>>> >>>> >>>> >>>> Lastly, if the problem persists, you should report it through the AFC >>>> interference portal: www.afcoperators.org >>>> >>>> >>>> >>>> On Mon, Jun 16, 2025 at 4:53 PM TJ Trout <[email protected]> wrote: >>>> >>>> One of our aviat lower 6ghz links started taking errors on one side, I >>>> haven't looked yet but I suspect it's interference from unlicensed ptp/ptmp >>>> gear, is this even worth chasing? It seems like I might be better off >>>> moving channels or bands? >>>> >>>> >>>> >>>> -TJ >>>> >>>> -- >>>> 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 >>>> >>> -- >> 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 >
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