My head is cloudy here...... So 5.8 CPE can be used with a 30dbi antenna? I can see that but it that true that it can be considered a ptp just because it's only talking to one far point yet the AP is ptmp? I see the logic but the FCC will go for that?
Bob- -----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Tom DeReggi Sent: Tuesday, December 15, 2009 3:05 PM To: WISPA General List Subject: Re: [WISPA] Ubiquiti PTMP Antenna Selection > Have they relaxed the rules on certification? No they have not. Most likely Ubiquiti has done this to avoid having to put peak power limits on their radio hardware. 26db radio + 7 dbi omni = 33db, less than 36db allowable limit. If they included larger sector antennas to be certified with the hardware, they might get asked to hardset reduce max power of the radios, to comply with FCC EIRP limits for that specific configuration. However, if a professional installer uses a higher gain antenns, such as a 20db sector, and manually sets the transmit power of the radio down to 16db, they are still within legal Part-15 EIRP rules. We've been through this before... individually the parts are FCC certified under modular component rules (example a mpci card in a laptop) and that might be all thats necessary to allow the parts to be legally sold and distributed. The same rules that would apply to StarOS, Mikrotik, or any OEM product apply in the same way to Ubiquiti. Allthough it might be evading the issue through a loop hole, it is the only possible way to enable a single product to be interchangeable between both a PTP and PTMP use, and not have the PTP use severally compromised when used in PTP. It should be noted that in 5.8G a CPE is allowed to follow PTP rules because it is being used in a PTP way, so a 30dbi antenna is certified for use on the CPE of a PtMP system. That is my take on it. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Mike" <m...@aweiowa.com> To: "WISPA General List" <wireless@wispa.org> Sent: Tuesday, December 15, 2009 1:33 PM Subject: Re: [WISPA] Ubiquiti PTMP Antenna Selection > Is that saying any antenna with less than 30dBi gain is within the > rules? Have they relaxed the rules on certification? Just curious. > > > At 12:04 PM 12/15/2009, Matt wrote: >>According to Ubiquiti themselves and the FCC: >> >>This equipment is required to be professionally installed >> >>The device has been designed to operate with the antennas listed below >>and having a maximum gain of 30dBi. Antennas not included in this list >>or having a gain greater than 30dBi are strictly prohibited for use with >>this device. The required antenna impedance is 50 ohms > > ... list deleted > > > > > ---------------------------------------------------------------------------- ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- ---- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > -- > Internal Virus Database is out-of-date. > Checked by AVG. > Version: 7.5.560 / Virus Database: 270.12.26/2116 - Release Date: > 5/15/2009 6:16 AM > ---------------------------------------------------------------------------- ---- WISPA Wants You! Join today! http://signup.wispa.org/ ---------------------------------------------------------------------------- ---- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
