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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 >>>>> Desk: 510-868-1614 x100 >>>>> Mobile: 510-207-0000 >>>>> [email protected] >>>>> >>>>> From: AF <[email protected]> On Behalf Of Ken Hohhof >>>>> Sent: Monday, February 25, 2019 8:27 PM >>>>> To: 'AnimalFarm Microwave Users Group' <[email protected]> >>>>> 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 <[email protected]> On Behalf Of Peter Kranz >>>>> Sent: Monday, February 25, 2019 6:51 PM >>>>> To: [email protected] >>>>> 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 >>>>> Desk: 510-868-1614 x100 >>>>> Mobile: 510-207-0000 >>>>> [email protected] >>>>> >>>>> -- >>>>> AF mailing list >>>>> [email protected] >>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>> >>>> -- >>>> AF mailing list >>>> [email protected] >>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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