We had a discussion about this on the ubnt board. I have a pair of nanobridge M
units. No difference was shown with an increase or decrease in power. I did
notice at a certain point that after a day the units would completely stop
transmitting. A reboot would fix it.
Sent from my iPhone
On Jun 24, 2010, at 8:16 AM, Faisal Imtiaz <fai...@snappydsl.net> wrote:
> FYI.....
> Please make sure that you are running the most recent version 5.2 on the M
> series... Older firmware had known issues in setting up the output power.
>
> Faisal
>
> On Jun 24, 2010, at 10:06 AM, "Stuart Pierce" <spie...@avolve.net> wrote:
>
>> I see negligible difference in signal strength anyway between 20 and 27.
>>
>> ---------- Original Message ----------------------------------
>> From: Francois Menard <fmen...@xittel.net>
>> Reply-To: WISPA General List <wireless@wispa.org>
>> Date: Thu, 24 Jun 2010 09:03:59 -0400
>>
>>> Or you can be legit in Canada, and go for 3.65 GHz and get up to 57 dBM
>>> legally in rural areas ;)
>>>
>>> Courtesy of the guy that changed the rules for 3.65 in Canada and is
>>> looking for the US to do the same...
>>>
>>> F.
>>>
>>> On 2010-06-23, at 5:41 PM, Fred R. Goldstein wrote:
>>>
>>>> I'm just a little confused about some of these nice-looking access
>>>> points. The UBNT Rocket M5, for instance, can put out +27 dBm. It
>>>> plugs *right into* a nice 19dB sector antenna. Okay, the smaller,
>>>> 120 dB sector is only 16 dB. Now math is not really my thing but I
>>>> get a total ERP there of +43 to 46 dBm.
>>>>
>>>> FCC Rule 15.247 states that the maximum transmitted power output for
>>>> digitally-modulated intentional radiators in the 5725-5850 MHz band
>>>> ("ISM") is 1 watt, and the maximum antenna gain is 6 dBi. Each
>>>> additional dB of antanna gain means one less dB of power. So the
>>>> maximum ERP is 4 watts (+36).
>>>>
>>>> Point-to-point is an exception in that specific band; it is allowed
>>>> unlimited antenna gain. But "point-to-multipoint systems,
>>>> omnidirectional applications, and multiple co-located intentional
>>>> radiators transmitting the same information" are under the cap.
>>>>
>>>> So am I correct in assuming that everybody who uses the Rocket M5, or
>>>> any other similar PtMP system for subscriber access, turns the
>>>> transmitter power REAL low (~+20 + feedline loss), in order to keep
>>>> the ERP below +36? Or are we assuming that since you're technically
>>>> only transmitting and receiving to one end user at a time, it's really PtP?
>>>>
>>>> SkyPilot's legal hack, of course, is to have eight 45 degree sector
>>>> antennas and only use one at a time, so it is legally PTP even with
>>>> +42 EiRP. And with advanced 11N 4x4 beamforming antennas, something
>>>> like that will become relatively easy. But we're not quite there
>>>> yet. Thoughts?
>>>>
>>>> --
>>>> Fred Goldstein k1io fgoldstein "at" ionary.com
>>>> ionary Consulting http://www.ionary.com/
>>>> +1 617 795 2701
>>>>
>>>>
>>>>
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>>>
>>>
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>>
>>
>>
>>
>>
>> ________________________________________________________________
>> Sent via the WebMail system at avolve.net
>>
>>
>>
>>
>>
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