Seems like the radio is being used as a scapegoat. If it’s an RF path issue, there’s only so much magic the electronics can do. Like a golfer blaming his clubs for his bad score. I don’t suppose they explained what features or specs of the Aviat radios are going to fix the problem, or do they even know what the problem is?
If they just need a few dB more fade margin, then yes, higher xmt power or better rcv sensitivity or something like that could help. A little. Stuff like 2048QAM or 4096QAM are going to increase the throughput under ideal conditions and do nothing for performance under adverse conditions. And the thing about fading is we’re talking huge dB numbers, which is hard to overcome with antenna gain or system margin where just a couple dB is difficult and expensive. Maybe this is what the future looks like with all this government funding and accountability for meeting specs. If you screw up, start looking around for a vendor to blame, and insist they take the equipment back because it was bought with CAF money. Good points about the narrow beams and the use of a passive repeater. It wouldn’t take much atmospheric effects or tower twist to affect the RF path. It’s also hard to believe they never had fading issues on the legacy equipment. I remember working for a telecom equipment manufacturer in the 80’s and common wisdom was you couldn’t submit any new equipment for telco evaluation during summer or “the fading season” because it was all hands on deck at the telcos to keep their long haul microwave links from dropping. I don’t know what manual tweaking was involved, but apparently it was a big issue. Just try binoculars on a long microwave path on a hot day and see what the atmosphere does to the image of that distant tower. Now imagine that’s a billboard and you have to make a bank shot off it. From: AF <[email protected]> On Behalf Of [email protected] Sent: Friday, May 17, 2019 1:46 PM To: [email protected] Subject: Re: [AFMUG] Cambium A motion was just made to revoke Frontier’s certificate if they cannot achieve 99.99% uptime/availability with the new Aviat radio. Wow, 15’ dishes warp in the wind, towers twist. The beamwidth .35 degrees. That is like a laser beam on this thing. If anyone with Aviat is listening, they need to give this deployment some extra focus or tell Frontier that they may have a problem using 15’ antennas and a passive repeater. There are lots of people watching. They should also true up the license. From: [email protected] <mailto:[email protected]> Sent: Friday, May 17, 2019 12:31 PM To: [email protected] <mailto:[email protected]> Subject: Re: [AFMUG] Cambium They should run a fiber up to the passive repeater location. Only 1 km. Or put an active repeater there. But again, this is Fronter. From: dave Sent: Friday, May 17, 2019 12:27 PM To: [email protected] <mailto:[email protected]> Subject: Re: [AFMUG] Cambium yeah thats huge! Why not do a spatial diversity to compensate for such a large dish for distance? I did a 71 mile shot with cambium sub 6Ghz using 4x 4' andrew dishes at each end with very stable shots. Of course real estate would be a factor. Diversity requires some spacing between dishes. I also converted an old microwave 12' dish for a tv station to spatial diversity and been in operation for 8yrs. On 5/17/19 1:20 PM, [email protected] <mailto:[email protected]> wrote: 4.6 Meter antennas. 15’ Wow. 48.3 dBi From: [email protected] <mailto:[email protected]> Sent: Friday, May 17, 2019 12:18 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] Cambium Thanks Looks like Frontier did not update their license ... 11 Ghz Still shows Alcate MDR-8611-135 radio. 16 km on one side 1 km on the other side of the billboard. That seems to be the requirement for billboards, very short leg on one side. From: Cassidy B. Larson Sent: Friday, May 17, 2019 12:14 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] Cambium Maybe this one? https://wireless2.fcc.gov/UlsApp/UlsSearch/licensePathsSum.jsp?pageNumToReturn=1 <https://wireless2.fcc.gov/UlsApp/UlsSearch/licensePathsSum.jsp?pageNumToReturn=1&licKey=963392> &licKey=963392 Contact is Frontier.. -- ---- Cassidy B. Larson CTO - InfoWest, Inc. Voice: 435-773-6073 [email protected] <mailto:[email protected]> ---- On May 17, 2019, at 12:03 PM, <[email protected] <mailto:[email protected]> > <[email protected] <mailto:[email protected]> > wrote: Cambium is getting torn up at a Utah Public Service Commission hearing this morning. Frontier installed a pair of Cambium something between Bald Mesa and Castle Valley Utah in December to change out a TDM radio. Bad fading on Cambium. A resort ranch filed a complaint and I am listening to he hearing this morning. Frontier is complaining that they got no support from Cambium. The radios would work for 3 or 4 days and then troubles would come again over and over. Frontier changed out the Cambium radio in March. They removed Cambium and said they have removed them as a vendor company wide. They changed to Aviat. Supposedly the new radios fixed everything. Typing this as I am listening to the hearing. The ranch still had some problems after changing to Aviat. Frontier says that the the new radios fixed everything. The new radio has not had any drop outs. This is a two hop system. They are changing out cambium on the second leg with Aviat soon. Passive repeater system on the second leg. Fog causes fading. Drops modulation down to low QAM levels. Frontier claims the second Aviat radio will make this network flawless. When asked what that means Frontier answered 99.99% Frontier is in process to take action against Cambium. CAF money was used to buy the Cambium radios. Second leg is scheduled for commissioning next week. Someone should take a look at this license and tell me the details on that passive repeater side. I am curious as to the leg distances. Too lazy to look it up. Frontier Telephone Company or whatever they are called now. Moab to Bald Mesa. Bald Mesa to Castle Valley. Passive on the second leg. I am betting these are 6 GHz links with huge antennas. -- 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 _____ -- AF mailing list [email protected] <mailto:[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
