All 3 AP's are displaying this characteristic, they transmit wonderfully though. My CPE's are working fine on another tower, so they are good.
Regards Michael Baird > Is this just on a single AP you are seeing this problem? We have seen > blown radio cards display a 20db difference on just one side of the > link. Replacing the card has always fixed the problem. > > Travis > Microserv > > Michael Baird wrote: >> Gino, >> >> 145', 15 degree VB, 7.7/7.8 puts my -3d at ~5 miles. If my downtilt was >> wrong, I would think it would impact the receive on my CPE's, much more >> then on the tower AP's, maybe that's a poor assumption on my part though. >> >> Regards >> Michael Baird >> >>> I think your downtilt is too much, whats your area and tower height? >>> The beamwidth of the maxrad sector? >>> >>> >>> Gino A. Villarini >>> g...@aeronetpr.com >>> Aeronet Wireless Broadband Corp. >>> tel 787.273.4143 fax 787.273.4145 >>> >>> -----Original Message----- >>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On >>> Behalf Of Michael Baird >>> Sent: Monday, June 15, 2009 1:29 PM >>> To: WISPA General List >>> Subject: Re: [WISPA] Radio Seperation >>> >>> My sector's are Maxrad adjustable sector's horizontally polarized, >>> adjusted to 120/13db, at 7.7 - 7.8 downtilt, trying to cover a 5 mile >>> radius. >>> Radios, are Ubiquity 400mw radio's, I've turned down to 23/200mw. >>> CPE's, are Ubiquity PS2, same radio at 400mw, Horizontal antenna at 18 >>> dbi. >>> >>> RSSI at the CPE is great, RSSI at the AP is poor often different by >>> 16-20 db. >>> >>> I also mentioned the RFLinx Qwave lightning arrestors, this is the first >>> tower we've used them on. >>> >>> Regards >>> Michael Baird >>> >>> >>> >>>> I don't think that this would be an antenna location issue. >>>> >>>> What antennas did you use and where are they pointed? >>>> >>>> Also, what output are the radios? If you use 600mw radios on the ap >>>> side and 100 mw radios on the rx side it'll make a difference. >>>> >>>> Also, having LOW power at the tx is almost always a good idea, >>>> especially when colocated like this. I usually only run 15 to 17dB at >>>> >>>> >>> >>> >>>> the ap's. Most of my sectors are 13dB. Yeah, I have customers at 18 >>>> miles with multi meg RELIABLE service this way. There are other >>>> customers at much shorter ranges that don't get reliable service, but >>>> >>>> >>> that's caused by other issues :-). >>> >>> >>>> We run most of our cpe at pretty high power these days due to the need >>>> >>>> >>> >>> >>>> to blow through the overpowered competition or just over all noise >>>> >>>> >>> levels. >>> >>> >>>> Anyway, what gain are the antennas and where are they pointed? How >>>> much downtilt etc. >>>> >>>> How far are the customers from the tower? >>>> >>>> What polarity are the antennas? All the same, or did you mix it up? >>>> >>>> What are the cpe radios? What power, what antennas etc. >>>> >>>> If you had a 15 db transmit antenna and a 15 db transmit radio >>>> shooting to a >>>> 15 dB panel at 5 miles you should see an rssi of, -83 or so. Legally >>>> you could have 6 more dB at the AP side giving you around -77 at the >>>> cpe 5 miles out. >>>> >>>> Hope this helps! >>>> marlon >>>> >>>> ----- Original Message ----- >>>> From: <m...@tc3net.com> >>>> To: <wireless@wispa.org> >>>> Sent: Saturday, June 13, 2009 1:09 PM >>>> Subject: [WISPA] Radio Seperation >>>> >>>> >>>> >>>> >>>> >>>>> We've just installed a 3 sector 2.4 setup, at 145' with maxrad 120's. >>>>> >>>>> >>> >>> >>>>> I'm noticing the receive sensitivity on the AP's are about 15-20 db's >>>>> >>>>> >>> >>> >>>>> different then what I see on the CPE's, tried a Tranzeo/Ubiquity >>>>> >>>>> >>> radio. >>> >>> >>>>> I'm using Ubiquity AP's, and they work fine on another 3 sector setup >>>>> >>>>> >>> >>> >>>>> I have, however this tower is an A-Frame. The tower owner won't allow >>>>> >>>>> >>> >>> >>>>> outside climbers so his guy did it, and he put one on each leg at >>>>> >>>>> >>> 145' >>> >>> >>>>> back to back. If the radios were too close together even on different >>>>> >>>>> >>> >>> >>>>> channels, would the RX performance on the AP exhibit this behavior? >>>>> Only other change on this tower was RFLinx Quarter-wave arrestors in >>>>> >>>>> >>> line. >>> >>> >>>>> If I'm 3-5 miles away I can see on the CPE a RSSI of -65 to -75 for >>>>> example, on the AP the reading would be in the -90 to not even below >>>>> the noise floor. >>>>> >>>>> Any thoughts would be appreciated as always. >>>>> >>>>> Regards >>>>> Michael Baird >>>>> >>>>> >>>>> --------------------------------------------------------------------- >>>>> ----------- >>>>> 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/ >>>> >>>> >>>> >>> ------------------------------------------------------------------------ >>> -------- >>> 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/ >>> >>> >> >> >> >> -------------------------------------------------------------------------------- >> 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/ -------------------------------------------------------------------------------- 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/
