Sloppy filters. Sent from my iPad
> On Feb 26, 2019, at 5:18 PM, Mathew Howard <[email protected]> wrote: > > 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 <[email protected]> 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 <[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 >> -- >> 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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