First, read this: http://www.enterprisenetworkingplanet.com/netsysm/article.php/3765946
It might sound strange but sometimes RSSI can be effected by interference. It's important to run the calcs on what you're running. I have a nice spread sheet if you need a calculator. I really really miss the YDI online one. Nice and simple. Not full of junk no one uses. Oh well. To offer more realistic help here we need to know a lot more info.... What TX power are the radios set for? How much coax? Lightning arrestors? Amps (db)? What antenna gain? If sectors, what coverage and how are they pointing? (example, customers are 500' lower than the antenna and 1 to 20 miles away. Antenna is downtilted 25*) How long are the cat 5 runs? Any other radio systems on that tower or near by (less than one mile)? If you do an ap scan from each AP (usually have to put them in client mode but some will do so via ap mode) how many other systems do you see and what levels do you see them at? Do you have the ability to run a general spectrum scan? If so, what does it show? (NOTE: If you run this test make sure to run a second test with all of the other AP's that you control turned off.) I turn the power wayyyyyy down on almost all of my AP's these days. Most are only putting out 15 to 20 dB. I use slightly larger customer antennas to make up for the AP TX power losses. This has REALLY helped the speeds and stability on my overall system. Believe it or not, I have customers at nearly 15 miles pulling 2 to 3 megs both ways via an 8 dB omni fed by a radio turned down to 17dB. I now have several customers over 15 miles that pull from 13dB sectors fed by 17dB ap's. Speeds are HIGHER than they were when I was running amped systems at 4 watts. Happy hunting! marlon ----- Original Message ----- From: "Mike Hammett" <[EMAIL PROTECTED]> To: "WISPA General List" <[email protected]> Sent: Wednesday, October 01, 2008 6:48 AM Subject: Re: [WISPA] Bad radio? > okay, now 3 days later the new south radio (originally north) is > misbehaving > in the same way (Tx/Rx signals are off by 10 where on the other sectors > they're roughly balanced). The signals going back to the tower are 8 - 10 > db stronger than the received signals. An R52 (or possibly R52H) is > shooting back to the tower whereas an XR5 is shooting down to the CPE. If > it were different radio specs, it'd be unbalanced the other way around. > > The SR5s that I have installed have been functioning just fine for years > and > are installed in the same fashion as the XR5s. Did UBNT make a bad batch > of > XR5s or am I doing something wrong? > > > ---------- > Mike Hammett > Intelligent Computing Solutions > http://www.ics-il.com > > > > -------------------------------------------------- > From: "Mike Hammett" <[EMAIL PROTECTED]> > Sent: Sunday, September 28, 2008 2:58 PM > To: "WISPA General List" <[email protected]> > Subject: Re: [WISPA] Bad radio? > >> I changed the freq a bit and didn't see any significant change. I >> climbed >> and swapped the pigtails with North and changed all the settings so they >> were fully swapped. Everyone on the south sector (which did have the >> questionable radio) is now happy. Now the North sector is showing the >> same >> symptoms on my test CPE. It's a good thing everyone except two are on >> East >> and West until I get this sorted out. Time to contact Streakwave about a >> bad radio... >> >> >> ---------- >> Mike Hammett >> Intelligent Computing Solutions >> http://www.ics-il.com >> >> >> >> -------------------------------------------------- >> From: "RickG" <[EMAIL PROTECTED]> >> Sent: Sunday, September 28, 2008 1:05 PM >> To: "WISPA General List" <[email protected]> >> Subject: Re: [WISPA] Bad radio? >> >>> It would be interesting to switch the freqs around and see what >>> happens. It's probably a bad radio or cable though. -RickG >>> >>> On Sun, Sep 28, 2008 at 1:06 PM, Mike Hammett <[EMAIL PROTECTED]> >>> wrote: >>>> Does this seem like the radio isn't loud enough? >>>> >>>> I setup the test CPE on the TV tower at my house and pointed it at the >>>> tower. Radio Mobile reports the azimuth as 250 degrees, so well within >>>> the south sector's coverage and only at a distance of 230'. I am well >>>> below the vertical beamwidth of the sectors, explaining the relatively >>>> low signals, but ICS2 is horrible. >>>> >>>> 1 = North, 2 = South, 3 = West, 4 = East. >>>> >>>> It makes no sense that South is that much worse signal wise than the >>>> others, especially considering that it should be on the South sector >>>> anyway. 3 and 4 are SR5s while 1 and 2 are XR5s. I just replaced the >>>> towers with the XR5s. >>>> >>>> >>>> >>>> [EMAIL PROTECTED] Test Platform] > /interface wireless scan wlan1 >>>> Flags: A - active, B - bss, P - privacy, R - routeros-network, N - >>>> nstreme >>>> ADDRESS SSID BAND >>>> FREQ >>>> SIG NF SNR RADIO-NAME >>>> AB R 00:15:6D:50:16:C6 ICS3 5ghz >>>> 5745 -72 -99 27 00156D5016C6 >>>> AB R 00:15:6D:50:17:09 ICS4 5ghz >>>> 5765 -68 -99 31 00156D501709 >>>> AB R 00:15:6D:64:0B:59 ICS1 5ghz >>>> 5785 -77 -99 22 00156D640B59 >>>> AB R 00:15:6D:64:0B:55 ICS2 5ghz >>>> 5825 -85 -99 14 00156D640B55 >>>> >>>> >>>> Here is a listing of the signals when connected: >>>> >>>> [EMAIL PROTECTED] Test Platform] > /interface wireless monitor wlan1 >>>> status: connected-to-ess >>>> band: 5ghz >>>> frequency: 5785MHz >>>> tx-rate: "6Mbps" >>>> rx-rate: "6Mbps" >>>> ssid: "ICS1" >>>> bssid: 00:15:6D:64:0B:59 >>>> radio-name: "00156D640B59" >>>> signal-strength: -77dBm >>>> tx-signal-strength: -74dBm >>>> noise-floor: -107dBm >>>> signal-to-noise: 30dB >>>> tx-ccq: 58% >>>> p-throughput: 5481 >>>> overall-tx-ccq: 58% >>>> authenticated-clients: 1 >>>> current-ack-timeout: 28 >>>> wds-link: no >>>> nstreme: no >>>> framing-mode: none >>>> routeros-version: "2.9.51" >>>> last-ip: 10.10.1.1 >>>> 802.1x-port-enabled: yes >>>> compression: no >>>> current-tx-powers: >>>> 6Mbps:24(24),9Mbps:24(24),12Mbps:24(24),18Mbps:24(24),24Mbps:24(24),36Mbps:22(22),48Mbps:20(20),54Mbps:19(19) >>>> notify-external-fdb: no >>>> >>>> >>>> [EMAIL PROTECTED] Test Platform] > /interface wireless monitor wlan1 >>>> status: connected-to-ess >>>> band: 5ghz >>>> frequency: 5825MHz >>>> tx-rate: "6Mbps" >>>> rx-rate: "6Mbps" >>>> ssid: "ICS2" >>>> bssid: 00:15:6D:64:0B:55 >>>> radio-name: "00156D640B55" >>>> signal-strength: -86dBm >>>> tx-signal-strength: -76dBm >>>> noise-floor: -107dBm >>>> signal-to-noise: 21dB >>>> tx-ccq: 59% >>>> p-throughput: 5535 >>>> overall-tx-ccq: 58% >>>> authenticated-clients: 1 >>>> current-ack-timeout: 167 >>>> wds-link: no >>>> nstreme: no >>>> framing-mode: none >>>> routeros-version: "2.9.51" >>>> 802.1x-port-enabled: yes >>>> compression: no >>>> current-tx-powers: >>>> 6Mbps:24(24),9Mbps:24(24),12Mbps:24(24),18Mbps:24(24),24Mbps:24(24),36Mbps:22(22),48Mbps:20(20),54Mbps:19(19) >>>> notify-external-fdb: no >>>> -- [Q quit|D dump|C-z pause] >>>> >>>> >>>> [EMAIL PROTECTED] Test Platform] > /interface wireless monitor wlan1 >>>> status: connected-to-ess >>>> band: 5ghz >>>> frequency: 5745MHz >>>> tx-rate: "6Mbps" >>>> rx-rate: "6Mbps" >>>> ssid: "ICS3" >>>> bssid: 00:15:6D:50:16:C6 >>>> radio-name: "00156D5016C6" >>>> signal-strength: -74dBm >>>> tx-signal-strength: -70dBm >>>> noise-floor: -106dBm >>>> signal-to-noise: 32dB >>>> tx-ccq: 59% >>>> p-throughput: 5518 >>>> overall-tx-ccq: 59% >>>> authenticated-clients: 1 >>>> current-ack-timeout: 28 >>>> wds-link: no >>>> nstreme: no >>>> framing-mode: none >>>> routeros-version: "2.9.51" >>>> last-ip: 10.10.3.5 >>>> 802.1x-port-enabled: yes >>>> compression: no >>>> current-tx-powers: >>>> 6Mbps:24(24),9Mbps:24(24),12Mbps:24(24),18Mbps:24(24),24Mbps:24(24),36Mbps:22(22),48Mbps:20(20),54Mbps:19(19) >>>> notify-external-fdb: no >>>> >>>> [EMAIL PROTECTED] Test Platform] > /interface wireless monitor wlan1 >>>> status: connected-to-ess >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! 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