23 miles I have heard...I will test at 8 and 14 next week... On Feb 23, 2016 4:05 PM, "Chuck McCown" <[email protected]> wrote:
> 22 dBm transmit power with a 23 dBi integrated antenna == 45 dBm EIRP > RX sensitivity, adaptive = –93 dBm. > To me that would be a system gain of only 138 dB. > Oh, but you have to add the RX antenna, so another 23 dBi and you get 158 > dB. > > There ya have it. > > *From:* Chuck McCown <[email protected]> > *Sent:* Tuesday, February 23, 2016 4:01 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] Force 200 Ptp distance > > If you max out the EIRP and go for minimum usable RX signal level, Cambium > says that difference is 158 dB. > (system gain) > > The rest is a free space path loss formula run backwards. > > *From:* Craig House <[email protected]> > *Sent:* Tuesday, February 23, 2016 3:58 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] Force 200 Ptp distance > > I understood it perfectly. Up to the period after sheet . It got a bit > fuzzy after that. > Craig > > > ------------------------------ > *From: *"Mathew Howard" <[email protected]> > *To: *"af" <[email protected]> > *Sent: *Tuesday, February 23, 2016 4:57:33 PM > *Subject: *Re: [AFMUG] Force 200 Ptp distance > > Your math confuses me... > > On Tue, Feb 23, 2016 at 4:52 PM, Chuck McCown <[email protected]> wrote: > >> 158 dB using 23 dBi integrated antenna according to the spec sheet. >> >> 158=20 log D + 20 log 5800 >> 7.9=log D +3.76 >> 4.14=log D >> >> 10 to the 4.14 power = 13,804 miles >> >> *From:* Joseph Marsh <[email protected]> >> *Sent:* Tuesday, February 23, 2016 3:45 PM >> *To:* [email protected] >> *Subject:* [AFMUG] Force 200 Ptp distance >> >> >> What is the max distance for a force 200 Ptp link? >> > > >
