I worked on this one - we did the interference analysis, coordination and will do the licensing, but we did not design the links or select antennas, radios, etc. I believe the answer is that the system had to be able to withstand 155 MPH + winds and the smallest 11 GHz antennas that meet these requirements are 4 footers. Here's more information if you're interested.
http://www.commscope.com/docs/extremeline_microwave_antennas_br-105563.pdf Get Outlook for iOS<https://aka.ms/o0ukef> _____________________________ From: Bill Prince <part15...@gmail.com<mailto:part15...@gmail.com>> Sent: Friday, December 30, 2016 8:01 PM Subject: Re: [AFMUG] Question Regarding 11ghz Links. To: <af@afmug.com<mailto:af@afmug.com>> The PCN had 3 links with a 4' dish at each end of each link for a total of 6 dishes. bp<part15sbs{at}gmail{dot}com> On 12/30/2016 1:32 PM, Eric Kuhnke wrote: A good quality 4' dish will have tighter RPE and better f/b ratio than a 2' or 3' dish. Or maybe they happened to have an extra 4' dish in stock and used it because it was "free". If it's a new purchase of a 4' dish for a 2 to 4 mile 11 GHz link that would be pretty silly unless they need seven nines of uptime at full modulation (1024QAM 5/6 code rate?) in ITU rain zones M, N or P. Tropical locations. http://www.racom.eu/images/radost/images/hw/ray/rain_zone_h.png On Fri, Dec 30, 2016 at 7:21 AM, Faisal Imtiaz <fai...@snappytelecom.net<mailto:fai...@snappytelecom.net>> wrote: I am curious, what is the wisdom behind installing 4ft dishes for a 2/4 mile 11ghz link ? Is there a technical reason ? or is it just a way to maximize the return for the vendor ? Regards Faisal Imtiaz Snappy Internet & Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net<mailto:supp...@snappytelecom.net>
