Do you have a reference for calculating the proper cable lengths and antenna spacing based on frequency when using splitters in a configuration like this?
Thanks, -Kristian On 10/25/2011 06:39 AM, Chuck Hogg wrote: > I thought I would post back on here what we did and our results. > These are preliminary. > > Equipment: > 1 x 320AP > > Configuration with only one sector: > Power set to 19.9dB (per the manual for legal power settings) > AP set to -65 power leveling > Client signals at the AP were -65 (or thereabouts, this fluctuates > from -65 to -70) for all clients. > Client receive levels ranged from -61 to -75. > > Equipment: > 1 x 320AP > 4 x 16.5dB 90 degree sectors > 2 x 4 way splitters from L-Com > > Configuration with only one sector: > Power set to full 25dB (per the manual for legal power settings, > assuming a -6.5dB of loss) > AP set to -65 power leveling > Client signals at the AP were -65 (or thereabouts, this fluctuates > from -65 to -70) for all clients. > Client receive levels ranged from -64 to -78. > > So essentially by adding a 4 way splitter the clients receive levels > increased by about 3.5-4dB. Tower receive levels were unchanged, as > most of the clients were power leveled down. Only one client is > transmitting at full power now. That client is also the highest > signal on both sides. Most client transmit levels are also running at > a higher power now as well. > > Conclusion: > I think that running 1 x 320AP x 4 sectors through splitters is a > little aggressive. If the majority of your clients are going to have > decent signal levels, then I see no problems with it. However, I > think that our current situation is a little on the edge. I think > that if you are looking for an inexpensive way to use 320AP's, I would > recommend this solution. I think that this solution has a higher net > gain over using an 8dB omni. My results show that it is pretty > consistent on being about a total loss of about 8dB using a 4 way > splitter. You can overcome 6.1dB of that loss in turning up the > transmit power of the radios. Your net loss is about 2.5-3dB, > however you are able to focus the sectors a little better. > > In the long run on future deployments, we will likely use 2 AP's and 4 > sectors with 4x2way splitters (MIMO). Once they reach capacity, we'll > add additional AP's. > > Regards, > Chuck > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -- Kristian Hoffmann System Administrator [email protected] http://www.fire2wire.com Office - 209-543-1800 | Fax - 209-545-1469 | Toll Free - 800-905-FIRE -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
