Like we’ve seen with all vendors, what are these data rates based on? Aviat’s “AirRate” is the absolute rock bottom including the worst possible FEC, no compression, etc. When comparing apples to apples, the bit rates for similar bandwidths and modulations will be similar.
Sent from my iPad > On Feb 26, 2019, at 5:58 PM, Peter Kranz <pkr...@unwiredltd.com> wrote: > > @Tim.. > > WTM platform may not support 80Mhz channel in 18Ghz, you may be stuck with 50 > Mhz according to the technical datasheet: > > <image002.png> > <image003.png> > So, reviewing… The delta between 64Mhz and 80Mhz is not that high.. ~118 Mbps > or around 9% which is interesting given the 25% more theoretical BW. > > Aviat 50 Mhz/2048QAM = 850 Mbps > Aviat 80Mhz/2048QAM = 1370 Mbps > DW 64 Mhz/2048 QAM = 1252 Mbps > > Peter Kranz > 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 Tim Hardy > Sent: Tuesday, February 26, 2019 11:53 AM > To: AnimalFarm Microwave Users Group <af@af.afmug.com> > Subject: Re: [AFMUG] Higher power 18Ghz radios.. > > > 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 > 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 > 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
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