I have one HPOL sector out of 23 the remaining are all vertical. I use filters everywhere and use mostly WaveRider. I had extremely poor luck with horizontal years back and haven't looked at them again.
We use Antel antennas mostly 120deg or less. I have some sites less than 3 miles apart. I have two Tranzeo sectors that we also use filters on. John - I used the 908.4 WR Filter for both Tranzeos and set the channel to 908 - works great. Brought my noise floors from -75 to a -90. I only used Tranzeo because of the uncertainty a few years ago with what is now Vecima. I've since gone back the the WR and are deploying the 8000's I will be testing an Alvarion solution for 900 in a couple of weeks, and we'll see how it compares to the 8MB I get with the CCU8000's. Have you done a packet analysis to see if sporadic traffic is why the latency goes up? Dave Hulsebus Portatve Technologies, LLC Leon D. Zetekoff wrote: > I agree with Josh H POL is a must on 900 > > 3-dB Networks wrote: >> What does your noise floor look like? C/I? >> Have you tried moving from H-pol to V-pol and vice versa? >> Could it be self interference (which I think might be the biggest >> problem >> with 900MHz, at least the possibility of it)? >> What type of antennas are you using... can you sectorize further or put >> higher gain antennas at the clients? >> Can you add filters possibly to help with the noise? >> How large are your channels? Can you use a smaller channel? >> >> Assuming your sectors are not overloaded... I would assume >> interference too. >> >> Now I would pitch Canopy... but I'm sure you don't want to hear that :-D >> >> Daniel White >> 3-dB Networks >> http://www.3dbnetworks.com >> >> >> >>> -----Original Message----- >>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On >>> Behalf Of John Scrivner >>> Sent: Thursday, August 06, 2009 7:10 AM >>> To: WISPA General List >>> Subject: [WISPA] Tranzeo 900 Latency >>> >>> We have a couple of sectors of 900 MHz Tranzeo which were running fine >>> previously but seem to experience enormous latency at times now. I am >>> talking about upwards of 5000 milliseconds (5 full seconds) for a >>> return >>> on >>> a ping. It is intermittent. I am guessing interference but was >>> wondering >>> if >>> anyone had seen anything else cause this. We have had limited >>> success in >>> dealing with interference in 900 MHz previously so we are hoping there >>> is >>> something else we can try before completely bailing on the band in >>> those >>> locations. Any ideas are appreciated. >>> John Scrivner >>> > ------------------------------------------------------------------------ > > > No virus found in this outgoing message. > Checked by AVG - www.avg.com > Version: 8.5.392 / Virus Database: 270.13.45/2285 - Release Date: 08/06/09 > 05:57:00 > > ------------------------------------------------------------------------ > > > > -------------------------------------------------------------------------------- > 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/
