My apologies, WISPA has been working diligently with Mimosa, UBNT, Cambium,
and FastBack Networks regarding this issue of OOBE. I thought Cambium made
that statement, but it might have been about ePMP.
Regards,
Chuck
On Tue, Mar 10, 2015 at 3:14 PM, Ken Hohhof <af...@kwisp.com> wrote:
> I’m not sure it’s quite that simple. First, regulatory limits aside, I
> believe the PMP450 hardware is only capable of 22 dBm total (19 + 19).
> Second, it doesn’t change with modulation, while depending on which
> Ubiquiti radio you’re looking at, it probably changes with modulation.
> Third, with a 17 dBi antenna at the AP, you are only allowed 19 dBm total
> (16 + 16) in MIMO mode even under the old 15.247 rules because the EIRP is
> limited to +36 dBm. (CPE is considered PTP and allowed higher EIRP but
> that may now run into the 15.407 OOBE issue) So even under 15.247, you
> would only be able to use 27 dBm xmt power at the AP if your antenna gain
> was 9 dBi or less.
>
> *From:* Chuck Hogg <ch...@shelbybb.com>
> *Sent:* Tuesday, March 10, 2015 1:15 PM
> *To:* af@afmug.com
> *Subject:* Re: [AFMUG] More LTE tradgedy of the commons on 5 GHz..
>
> That's a problem of the OOBE issue.
>
> Regards,
> Chuck
>
> On Tue, Mar 10, 2015 at 1:30 PM, Bill Prince <part15...@gmail.com> wrote:
>
>> I also wonder with MIMO systems why the V/H or -45/+45 polarities are not
>> considered separate transmitters (because they are). In which case each
>> one should be allowed up to the limit?
>>
>> AND... What allows UBNT to transmit at up to 27 dbm, yet PMP450 is
>> limited to 22 dbm? What's different there that I don't understand? 5 dbm
>> is a bunch in my book. Is it OOB that is the issue here?
>>
>> bp
>> <part15sbs{at}gmail{dot}com>
>>
>>
>> On 3/10/2015 10:23 AM, Ken Hohhof wrote:
>>
>> Personally I also feel there is a flaw in the way EIRP is regulated on
>> FHSS systems. The limit in 900 MHz is on total EIRP, not power spectral
>> density. Somehow the FCC feels it is OK to concentrate 4 watts in one
>> narrow hopping sub-channel as long as the dwell time isn’t too long.
>> That’s like saying you can use a magnifying glass to concentrate sunlight
>> on a single ant and it won’t hurt the ant as long as you move it to a
>> different ant every second. No, you end up with a bunch of smoking ant
>> carcasses on the sidewalk.
>>
>> Also the smartgrid mesh networks seem to violate the spirit of the
>> requirement that you can’t get around the EIRP limit by using multiple
>> transmitters to send the same data, for example in a MIMO system.
>>
>>
>> *From:* Jeremy Grip <g...@nbnworks.net>
>> *Sent:* Tuesday, March 10, 2015 12:10 PM
>> *To:* af@afmug.com
>> *Subject:* Re: [AFMUG] More LTE tradgedy of the commons on 5 GHz..
>>
>>
>> +1
>>
>>
>>
>> *From:* Af [mailto:af-boun...@afmug.com <af-boun...@afmug.com>] *On
>> Behalf Of *Peter Kranz
>> *Sent:* Tuesday, March 03, 2015 12:02 PM
>> *To:* af@afmug.com
>> *Subject:* Re: [AFMUG] More LTE tradgedy of the commons on 5 GHz..
>>
>>
>>
>> I think the point some are missing is the lesson learned from 900Mhz and
>> smart meters.
>>
>>
>>
>> While 900Mhz is unlicensed spectrum, a single operator has managed to
>> take it over in California to the point where no other user has any chance
>> of using the spectrum for commercial purposes.
>>
>>
>>
>> By this I mean that PG&E’s deployment of smart meters on every power
>> meter in the area, and on top of power poles, and other high sites, has
>> raised the noise floor on this band to unusable levels for high speed
>> communications.
>>
>>
>>
>> So by means of overwhelming numbers, PG&E managed to take over 900Mhz for
>> its own users, stranding the investment of ISPs in this spectrum in
>> affected markets. I don’t think the commissions initial concept of
>> unlicensed spectrum was that a single operator would do this, I think they
>> expected operators by this to use licensed spectrum.
>>
>>
>>
>> I’d like to see a limit on how many systems a particular entity can
>> deploy in an unlicensed band. It could be some high number, like 1 million
>> units.
>>
>>
>>
>>
>> *Peter Kranz*Founder/CEO - Unwired Ltd
>> www.UnwiredLtd.com <http://www.unwiredltd.com/>
>> Desk: 510-868-1614 x100
>> Mobile: 510-207-0000
>> pkr...@unwiredltd.com
>>
>>
>>
>
