Speaking generally here, not about this product specifically:

A 30 is a 30 at some dB down from peak.  Most reputable antenna manufacturers 
cite the beamwidth at the 3 dB down points on each side of the main lobe.  That 
is called HPBW or half power beam width.

Some go out farther to the 6 dB point to make their beam width seem wider than 
their competitors.  Personally I believe that is false advertising.  But I am 
sure they do not share my opinion.

Look at the type of beamwidth.  Should state how many dB down somewhere on the 
spec sheet.

Other than that, horn antennas are very well characterized.  They are used as 
lab standard calibration antennas.  Other than the point where they choose to 
specify the beamwidth I think you can totally trust the specs.  

From: Steve Jones 
Sent: Wednesday, April 11, 2018 9:01 AM
To: af@afmug.com 
Subject: Re: [AFMUG] Rfelements

so if im getting the right feel, here, I CAN trust these spec sheets? a 30 is 
actually 30 and not 90? FB is real? 
Ive had two in play on EPMP1000 for some time but i keep pulling them and 
moving them elsewhere because of changes, so Ive never had one up long enough 
to see. I have use case for narrower patterns and more APs at some sites 
because the uplinks are getting more interference than id prefer, my only other 
option is to add the secondary antenna on the 2000, im not a fan of adding 
windload with no net capacity gain

On Wed, Apr 11, 2018 at 9:57 AM, Steve Jones <thatoneguyst...@gmail.com> wrote:

  we have a substantial garbage dump 

  On Wed, Apr 11, 2018 at 9:08 AM, Jaime Solorza <losguyswirel...@gmail.com> 

    There's mountains near Steve's WISP footprint? 

    Jaime Solorza

    On Wed, Apr 11, 2018, 7:45 AM Mike Hammett <af...@ics-il.net> wrote:

      You have that the other way around. A horn would be ideal in a mountain 

      Mike Hammett
      Intelligent Computing Solutions

      Midwest Internet Exchange

      The Brothers WISP


      From: "Sean Heskett" <af...@zirkel.us>
      To: af@afmug.com
      Sent: Tuesday, April 10, 2018 10:49:19 PM
      Subject: Re: [AFMUG] Rfelements

      I Totally agree with josh.

      They have a specific purpose so if you can deploy within those parameters 
they are great.

      Unfortunately our area isn’t conducive to that type of deployment because 
of terrain.  In the mountains you need antennas with a wider vertical beam 
because your towers are on mtn peaks and some clients are same height as the 
tower and other clients are on the valley floor.  It’s hard to use a spot beam 
to cover all that.

      In the Midwest or other flat areas I could see them being useful to spot 
beam the population centers.


      On Tue, Apr 10, 2018 at 8:29 PM Josh Reynolds <j...@kyneticwifi.com> 

        They are great for stuff like 30/40Mhz wide, gps sync, put 4-6 on a 
pole in a subdivision  or on a tower leg kinda thing.  

        If anybody thought they were for something else (ie long range), they 
didn't read the data sheets.

        Lightweight, low size, low wind load, perfectly circular pattern - 
great spot beams. Good F/B ratio.

        On Tue, Apr 10, 2018, 9:12 PM Robert <i...@avantwireless.com> wrote:

          I recently did a couple of tests with RF horns.   I was hoping for a 
          and was disappointed.   I was hoping that they could be colocated
          closer than regular sectors that I use and the crosstalk signal levels
          were just about the same as the shielded sectors.   As far as the
          signals at the CPE's they were pretty good but not amazingly better 
          as small as the target area got reduced to.

          On 4/10/18 6:43 PM, Steve Jones wrote:
          > Can i get some non fanboy real world on these guys? Btw, i hate 
          > groups almost as much as dslreports or the ubnt forums, this is
          > literally the only place to get legitimate product info.

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