the part 15 PTP 24Ghz band is only from 24000-24200Mhz (200Mhz of spectrum) i would assume that the doppler radar for cars is in another slice of the 24Ghz spectrum. as far as i know 24000-24200Mhz is for part 15 PTP only.
shouldn't be an issue. 2 cents -sean On Wed, Jan 8, 2014 at 8:06 AM, Fred Goldstein <[email protected]>wrote: > On 1/8/2014 9:35 AM, Jack Lehmann wrote: > > In NYC (outer borough), I have a bunch of 24GHz SAF ~2.5 mile links doing > very nicely. Very satisfied with their performance. All that, knowing that > there's always the risk of unlicensed interference relative to licensed. > Still holding nicely though, considering the wild weather we've been > having. I also have not seen RF interference issues at all. > > > Just to clarify... I wouldn't touch 24 GHz *for an 11-mile link*. But > they're great for shorter links, like yours, especially in urban areas. > And the narrow beams do limit interference. We do fine with 60 GHz too, for > very short hops, like half a mile, though preferably with a 5 GHz backup or > alternative path. > > I am a bit curious about vehicle radar, though. I've seen it mentioned as > operating in the 24 and 70 GHz bands. Only a few high-end cars have it now > but it is likely to become more common. Does anyone know how often it uses > 24 GHz? This might eventually impact urban paths or those that go over > highways. > > > Message: 1 >> Date: Wed, 08 Jan 2014 00:11:47 -0500 >> From: Fred Goldstein <[email protected]> >> Subject: Re: [WISPA] Advice Needed on 200 Mbps FDX Radios >> To: [email protected] >> Message-ID: <[email protected]> >> Content-Type: text/plain; charset="iso-8859-1" >> >> On 1/7/2014 8:29 PM, Gino Villarini wrote: >> > >> > Its doable with the PTP650's, add 3' dishes for a nice rx gain >> > >> >> I seem to recall a story several years ago, before Orthogon was bought >> by Moto, about a link somewhere in Central America (Nicaragua or >> Panama?) that used a pair of 5.8 GHz Orthogon radios, 6 foot dishes, and >> went over 100 miles. Hilltops and a really big dish will do wonders. >> Licensed 6 GHz radios, with their 6' dishes, are considered very >> reliable out to 30 miles. An unlicensed link is not protected against >> interference the same way but several of the 5.8 GHz options seem >> plausible. >> >> But I wouldn't touch 24 GHz. It's ground zero for rain fade, so long >> hops there are only useful on sunny days, best in the desert. ;-) The >> adjacent 23 GHz licensed band has less rain fade, though, and is worth >> considering, and it should be duck soup on 18 GHz, though again licensed >> radios cost a bit more, especially the higher-powered or higher-speed >> options. We're shooting a DragonWave 18 GHz hop about 8 miles across >> Boston Hahbah and it's very solid, though extreme weather might cause >> some dropouts. We didn't see any during this past week's snow, though >> signals faded a few dB during yesterday's rain. >> >> > Gino A. Villarini >> > >> > [email protected] <mailto:[email protected]> >> > >> > Aeronet Wireless Broadband Corp. >> > >> > 787.273.4143 >> > >> > *From:*[email protected] [mailto:[email protected]] >> > *On Behalf Of *Christian Palecek >> > *Sent:* Tuesday, January 07, 2014 9:21 PM >> > *To:* WISPA General List >> > *Subject:* Re: [WISPA] Advice Needed on 200 Mbps FDX Radios >> > >> > Seems like you are asking a lot of unlicensed, unless it is completely >> > quiet in your area... >> > >> > Sent from my Verizon Wireless 4G LTE Smartphone >> > >> > >> > >> > -------- Original message -------- >> > From: Ian Framson >> > Date:01/07/2014 6:10 PM (GMT-07:00) >> > To: WISPA General List >> > Subject: [WISPA] Advice Needed on 200 Mbps FDX Radios >> > >> > Hi Wisps, >> > >> > We are looking for a pair of radios that can do 200 Mbps FDX over 11 >> > miles (real world, not manufacturer's theoretical marketing promises). >> > We are looking at using an unlicensed link (most likely 5 GHz) due to >> > the time constraints, although we're open to suggestions. >> > >> > The make/model we were considering was Motorola PTP650 with 450 Mbps >> > upgrade license. We are not wed to Motorola, however. The cost seems >> > to be the limiting factor at this point. >> > >> > Another WISP I spoke with mentioned Bridgewave TD60 might be 1 >> > possibility. >> > >> > Your thoughts? >> > >> > > -- > Fred R. Goldstein k1io fred "at" interisle.net > Interisle Consulting Group > +1 617 795 2701 > > > _______________________________________________ > Wireless mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/wireless > >
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