Well, I'm just guessing, but what other reason would there be for occupying 79mhz with a 56mhz radio?
On Tue, Feb 26, 2019 at 4:08 PM Tim Hardy <thardy...@gmail.com> wrote: > If that’s the case, it must’ve been truly horrid at 56 MHz. There are > consequences in this wasting of spectrum - you’ll notice that modulations > less than 16 QAM are not currently coordinated or licensed since they fail > to meet the FCC’s minimum of 1 bit/Hz. Any operation of the AF-11 at QPSK > or 1/4 QPSK is not actually legal.. > > Sent from my iPad > > On Feb 26, 2019, at 4:34 PM, Mathew Howard <mhoward...@gmail.com> wrote: > > Yeah, but my point is that they made a really noisy 56mhz radio work by > just occupying a full 80mhz channel... at least that's the way I understand > it. It seems like they're kind of doing the same thing here. > > On Tue, Feb 26, 2019 at 3:24 PM Tim Hardy <thardy...@gmail.com> wrote: > >> While the AF-11 used a 56 MHz chipset, the radio occupies 79.6 MHz - >> unlike all other radios with these chips that limit their bw to 56 MHz >> (this used to be the ETSI maximum). The AF-11 system gain is horrible for >> 1024 QAM when compared to other outdoor radios - either full 60 MHz or full >> 80 MHz bw. >> >> Sent from my iPad >> >> On Feb 26, 2019, at 3:26 PM, Mathew Howard <mhoward...@gmail.com> wrote: >> >> Interesting, so I'm guessing that they're able to reduce the noise to an >> acceptable level at that high of power by using a narrower channel... kind >> of like what Ubiquiti did with the AirFiber 11. >> >> On Tue, Feb 26, 2019 at 1:54 PM Tim Hardy <thardy...@gmail.com> wrote: >> >>> >>> Just an FYI.. >>> According to this chart, the occupied bandwidth is only 64.5 MHz so you >>> will be losing capacity vs radios that occupy the full 80 MHz bandwidth. >>> The DW radio will have to be coordinated and licensed in one of the 80 MHz >>> channel allocations as there are no FCC channel plans between 51 MHz and 79 >>> MHz. There are only 4-channel pairs available at 80 MHz and its difficult >>> to coordinate multiple pairs in many areas as a result. Finally, while >>> these power levels are impressive, they don't tell the full story and you >>> really need to compare the system gain values at the desired modulations. >>> The DW 64.5 MHz radio’s system gain at 2048 QAM is 83 dB vs. the WTM 4100 >>> 80 MHz radio’s system gain at 2048 QAM which will be 73.5 dB. >>> >>> On Feb 26, 2019, at 12:19 PM, Peter Kranz <pkr...@unwiredltd.com> wrote: >>> >>> +31 is the advertised 2048QAM output on the HP variant. Dragonwave >>> contacted me offline and is indicating a March availability. Here is the >>> table of power output levels for that radio. It should also support >>> 4096QAM, but I’m not sure if that’s available in the software yet. >>> >>> <image001.png> >>> >>> >>> *Peter Kranz*www.UnwiredLtd.com <http://www.unwiredltd.com/> >>> Desk: 510-868-1614 x100 >>> Mobile: 510-207-0000 >>> pkr...@unwiredltd.com >>> >>> *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Ken Hohhof >>> *Sent:* Monday, February 25, 2019 8:27 PM >>> *To:* 'AnimalFarm Microwave Users Group' <af@af.afmug.com> >>> *Subject:* Re: [AFMUG] Higher power 18Ghz radios.. >>> >>> Looks like PTP820c is only +16. >>> >>> You’re talking about xmt power actually at 2048QAM modulation, right? >>> +31 is hard to believe. >>> >>> I remember hearing that Broadcom was supposed to have a chip with >>> adaptive digital predistortion for high xmt power also 4096QAM not sure if >>> that became real. >>> >>> *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Peter Kranz >>> *Sent:* Monday, February 25, 2019 6:51 PM >>> *To:* af@af.afmug.com >>> *Subject:* [AFMUG] Higher power 18Ghz radios.. >>> >>> Dragonwave announced over a year ago the Harmony Enhanced 18HP, with +31 >>> TX power at 2048 QAM, but have never made it to production as far as I >>> know. From the top of my head, here are some of the major radios TX power >>> in 18 Ghz band: >>> >>> Dragonwave Harmony Enahcend HP – 31 <Vaporware?> >>> Dragonwave Harmony Enhanced SP – 22 >>> Bridgewave Navigator – 19 >>> Aviat WTM 4200 – 17.5 >>> SIAE AlfoPlus2 – 17 >>> >>> Curious if anyone is aware of an 18Ghz dual core radio capable of higher >>> TX power at 2048QAM? It’s quite difficult to license 6Ghz or 11Ghz paths in >>> my market. >>> >>> >>> *Peter Kranz*www.UnwiredLtd.com <http://www.unwiredltd.com/> >>> Desk: 510-868-1614 x100 >>> Mobile: 510-207-0000 >>> pkr...@unwiredltd.com >>> >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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