+1 to Tim's remarks in this thread. The challenge isn't in coordinating the same frequency pair in H and V between two sites, in both directions. Instead, the challenge is in assessing and accepting the risk of possibly bucking your own 11GHz links or other operator's 11GHz links on or near your two endpoints. As there is no reliable way to calculate this type of interference, you may only become aware of the problem after you have installed and turned up your TDMA system.
If there are no other 11GHz systems within about a half km of either site and you don't plan to expand either site with additional 11GHz equipment from other vendors, you may be ok. If not, then ? Mike Black Black & Associates 727-773-9016 www.bamicrowave.com logo.png black & associates Frequency Coordination ● FCC Licensing ● Engineering Design -----Original Message----- From: Af [mailto:[email protected]] On Behalf Of Hardy, Tim Sent: Monday, October 19, 2015 8:29 PM To: [email protected] Subject: Re: [AFMUG] Mimosa B11: Exactly what does the mounting look like? In the olden golden days building the MCI route with full block systems, we would have "bucks" or "bumps" in frequency plans when required, and we learned first hand how important it was to use ultra high performance antennas or better in such situations. With very little free space loss, antenna performance is key and there is very little reliable data on close-coupling antenna performance, so it is extremely difficult to accurately calculate expected interference levels in these situations. With the prevalence of 2&3' antennas these days, antenna isolation will be an even larger challenge. Sent from my iPhone > On Oct 19, 2015, at 8:03 PM, Seth Mattinen < <mailto:[email protected]> [email protected]> wrote: > >> On 10/19/15 16:56, George Skorup wrote: >> To make Tim's point, we're co-located on a couple towers with other >> 11GHz users and using both the high and low of a channel pair at both >> ends is unpossible. (yes, that's a word :) > > It's a perfectly cromulent word. > > ~Seth
