That was antenna height AGL. I’ll look up the system gains when I can, but I
think it was something else - I have my suspicions..
Sent from my iPad
> On May 17, 2019, at 6:50 PM, <ch...@wbmfg.com> <ch...@wbmfg.com> wrote:
>
> I thought the license said 4.5m antennas.
>
> I wonder what the system gain is comparing Cambium and Aviat?
>
> From: Tim Hardy
> Sent: Friday, May 17, 2019 4:12 PM
> To: AnimalFarm Microwave Users Group
> Subject: Re: [AFMUG] Cambium
>
> I researched this some and here’s some additional information:
>
> The original Bald - Passive - Castle Pk path was built in the 1992 time frame
> and it was 2.1 GHz digital. The 2.1 GHz radios and antennas were changed out
> to 11 GHz when the 2.1 GHz band was reallocated to PCS in 2010. PCS
> licensees were required to reimburse current 2.1 licensees’ total cost for a
> comparable system in another band.
>
> The 11 GHz path is using 10’ antennas (not 15’!), Andrew HP10-107F models
> with 48.3 dBi gain. It was originally installed with Alcatel MDR-8611-135
> TDM radios operating fixed modulation at 64 QAM (ACM was not available back
> then, and it wasn't legal anyway). It appears that this old TDM system was
> seriously power limited (15 dBm maximum on both sides) and I assume that this
> was due to extreme frequency congestion in the area (but thats just an
> assumption, but another reason why big shrouded antennas would be necessary).
>
> The Bald - Moab path was originally built in 1992 and licensed to Mountain
> Bell (the records are kinda sketchy) and it has two duplex 6 GHz pairs and
> two duplex 11 GHz pairs.
>
> When they decided to change from TDM to IP they naturally wanted to re-use
> existing plant as much as possible. I have no idea why the Cambium system
> had issues, but can guess that the problems were probably in installing and
> provisioning the radios properly. It’s curious that they apparently had no
> reported propagation issues with the old TDM radios on the two paths.
>
> The licensing is correct as they described it. Bald Mesa - Moab has
> applications on-file for the Aviat WTM radio and they can operate under
> conditional authority - the second hop has not been filed for yet.
>
> Someone mentioned using space diversity antennas as a way to reduce antenna
> size - these would have no-effect in a rain limited situation (they mentioned
> fog and didn't say anything about multipath).
>
>> On May 17, 2019, at 3:22 PM, <ch...@wbmfg.com> <ch...@wbmfg.com> wrote:
>>
>> Yep. I spent about 15 minutes with Radio Mobile and found a spot in the
>> valley floor they could move to and eliminate the passive. The spot is near
>> their existing land lines, it has visiblility to the remote and power, so
>> they could do an active repeater there if they did not want to plow cable to
>> it.
>>
>> From: Bill Prince
>> Sent: Friday, May 17, 2019 12:56 PM
>> To: af@af.afmug.com
>> Subject: Re: [AFMUG] Cambium
>>
>> That size antenna on a mountain top and a passive repeater? Sheesh.
>>
>>
>> bp
>> <part15sbs{at}gmail{dot}com>
>>
>>> On 5/17/2019 11:20 AM, ch...@wbmfg.com wrote:
>>> 4.6 Meter antennas. 15’ Wow. 48.3 dBi
>>>
>>> From: ch...@wbmfg.com
>>> 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&licKey=963392
>>>
>>> Contact is Frontier..
>>>
>>>
>>>
>>>
>>> --
>>> ----
>>> Cassidy B. Larson
>>> CTO - InfoWest, Inc.
>>> Voice: 435-773-6073
>>> c...@infowest.com
>>> ----
>>>
>>>
>>>> On May 17, 2019, at 12:03 PM, <ch...@wbmfg.com> <ch...@wbmfg.com> 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.
>>>>
>>>>
>>>>
>>>>
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