We need to know what they are basing this throughput on compression, frame size, etc. no way they can claim a 64 MHz bw (reference the emission designator in the chart) has the same throughput as a true 80 MHz bw radio at the same modulation.
Sent from my iPad > On Feb 26, 2019, at 6:26 PM, Peter Kranz <[email protected]> wrote: > > I also believe the Dragonwave Radio is actually a full 80Mhz channel based on > the throughput.. > For instance, the Bridgewave/Remec Navigator 80Mhz/2048QAM radio is 1248 Mbps > vs 1252 Mbps from the Dragonwave vs 1370 for the Aviat.. > > Peter Kranz > www.UnwiredLtd.com > Desk: 510-868-1614 x100 > Mobile: 510-207-0000 > [email protected] > > From: AF <[email protected]> On Behalf Of Peter Kranz > Sent: Tuesday, February 26, 2019 2:58 PM > To: 'AnimalFarm Microwave Users Group' <[email protected]> > Subject: Re: [AFMUG] Higher power 18Ghz radios.. > > @Tim.. > > WTM platform may not support 80Mhz channel in 18Ghz, you may be stuck with 50 > Mhz according to the technical datasheet: > > <image001.png> > <image002.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 > [email protected] > > From: AF <[email protected]> On Behalf Of Tim Hardy > Sent: Tuesday, February 26, 2019 11:53 AM > To: AnimalFarm Microwave Users Group <[email protected]> > 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 <[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
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