In a regular FDD system each end of the system is either a high or a low. If you use the same frequency as an existing FDD 11 GHz link at the same site, it would be the same as colocating a "high" radio within 10 meters of a "low" radio.
On Tue, Oct 20, 2015 at 4:06 AM, Faisal Imtiaz <[email protected]> wrote: > >>>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. > > > Call me stupid, and please explain how that is ......I can understand the > issue of channel/polarity availability...however how is this potential > interference different from current ..... Today, one cannot use the same > channel/polarity on the same site anyway... > > The B11, actually opens up the possibility of channel reuse, on the same > site with angular separtion ...(possibility being a key word). > > 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: [email protected] > > ------------------------------ > > *From: *"Mike Black" <[email protected]> > *To: *[email protected] > *Sent: *Tuesday, October 20, 2015 12:45:25 AM > *Subject: *Re: [AFMUG] Mimosa B11: Exactly what does the mounting look > like? > > +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 > > > > [image: 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 <[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 > > > >
