I have a genuine interest to know what's going on here.

Why wasn't this an issue before and what effect does this have on a radio no 
longer transmitting as powerfully?  I could see it going deaf, but it hears 
just fine.

I'm thinking about ditching the PC and mPCI - PCI adapter and going with 4x 
RB411AHs instead, providing some increased radio separation.  Depending on 
how I do it, there may be sheet metal between each RB411AH as well.


----------
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com



--------------------------------------------------
From: "Travis Johnson" <[EMAIL PROTECTED]>
Sent: Wednesday, October 01, 2008 12:25 PM
To: "WISPA General List" <wireless@wispa.org>
Subject: Re: [WISPA] Bad radio?

> The noise is coming from the actual wireless cards being so close to
> each other. Not all of the signal is going out the cable... and with
> cards stacked within inches from each other, more noise bleeds over.
>
> Travis
> Microserv
>
> Mike Hammett wrote:
>> So are you telling me that I can only run 2 or 3 radios in upper 5 GHz 
>> without stepping on myself?
>>
>> I was pretty sure nothing was greater than -60 or so before I made these 
>> tower changes, but silly me, I didn't bother to document what I saw.
>>
>> Some of those signals don't make any sense, either.  Between North and 
>> East and North and South are gigantic chunks of metal to where I doubt 
>> you could even physically see a foot or two to the side of either sector.
>>
>>
>> ----------
>> Mike Hammett
>> Intelligent Computing Solutions
>> http://www.ics-il.com
>>
>>
>>
>>
>> From: Travis Johnson
>> Sent: Wednesday, October 01, 2008 11:21 AM
>> To: WISPA General List
>> Subject: Re: [WISPA] Bad radio?
>>
>>
>> This really looks like you are causing yourself all kinds of 
>> interference. Using the channels you listed:
>>
>>
>> North, ICS1 = 5785
>> South, ICS2 = 5805
>> East, ICS4 = 5765
>> West, ICS3 = 5745
>> I'm sure they are stepping on each other. The signal doesn't just drop 
>> completely off on the edges. I assume 20mhz wide channels (because you 
>> didn't specify), meaning North and South edges are right next to each 
>> other, but in the same case, on the same card, I'm sure you are stepping 
>> on yourself. Same with the East and West ones.
>>
>> So, on the North you are actually using 5775 to 5795. While on the South 
>> you are 5795 to 5815. I can tell you right now that even having 10mhz 
>> between channel edges isn't going to be enough... you will need 20-40mhz 
>> of spacing between the edges of the band to keep from interfering with 
>> yourself.
>>
>> Travis
>> Microserv
>>
>> Mike Hammett wrote:
>> The TX is currently set to default in MT 2.9.51, whatever dB that turns 
>> out
>> to be.  I was going to tune it once the system stabilized.
>>
>> Maybe 20' of LMR-400.
>>
>> No lightning arrestors.  The other sectors on the tower sat there for 
>> years
>> without them and no damage, so when I upgraded and had the wrong pigtails 
>> to
>> use the existing arrestors, I removed them.
>>
>> No amps, just the XR5s...  I'd never use an amp.
>>
>> Roughly 16 dBi gain for all 4 sectors pointed North, South, East, and 
>> West.
>> They all have roughly 5 degrees of downtilt.
>>
>> No PoE, the MT system is a PC with a 4 slot mPCI adapter.  The only other
>> cat 5 is going to an Orthogon Gemini (and it's PoE).  This is pointed 
>> east
>> and is on the opposite side of the grain leg from the troubled sector.
>>
>> Nothing else within 1 mile that uses upper 5 GHz.  Well, there's CPE in
>> unknown bands, but they didn't affect the previous radio\antenna combo.
>>
>> All customers use 19 or 24 dBi RooTennas, depending on distance from 
>> tower.
>> I believe everyone is between -60 and -75.
>>
>> For some reason, some of these sectors are much louder than they were
>> previously, though I don't have any documentation as to who saw what 
>> before.
>> What do band-pass filters cost and where can I get them?  Maybe I ought 
>> to
>> invest in some of those.
>>
>> North, ICS1 = 5785
>> South, ICS2 = 5805
>> East, ICS4 = 5765
>> West, ICS3 = 5745
>>
>> North = 1
>> =======
>> Flags: A - active, B - bss, P - privacy, R - routeros-network, N - 
>> nstreme
>>       ADDRESS           SSID
>> BAND       FREQ SIG RADIO-NAME
>> AB R  00:15:6D:50:16:C6 ICS3
>> 5ghz       5745 -49 00156D5016C6
>> AB R  00:15:6D:50:17:09 ICS4
>> 5ghz       5765 -37 00156D501709
>> AB R  00:15:6D:64:0B:59 ICS2
>> 5ghz       5805 -43 00156D640B59
>> AB RN 00:0C:42:05:51:B7 Walter
>> 5ghz       5260 -71 000C420551B7
>>
>> South = 2
>> =======
>> Flags: A - active, B - bss, P - privacy, R - routeros-network, N - 
>> nstreme
>>       ADDRESS           SSID
>> BAND       FREQ SIG RADIO-NAME
>> AB R  00:15:6D:50:16:C6 ICS3
>> 5ghz       5745 -51 00156D5016C6
>> AB R  00:15:6D:50:17:09 ICS4
>> 5ghz       5765 -38 00156D501709
>> AB R  00:15:6D:64:0B:55 ICS1
>> 5ghz       5785 -29 00156D640B55
>>
>> East = 4
>> =======
>> Will run a scan during non-peak times.
>>
>> West = 3
>> =======
>> Will run a scan during non-peak times.
>>
>> Mikrotik reports a debatable noise floor reading, which is supposed to
>> represent all non-802.11 systems.  It isn't worse than -99 on any sector.
>>
>>
>>
>> ----------
>> Mike Hammett
>> Intelligent Computing Solutions
>> http://www.ics-il.com
>>
>>
>>
>> --------------------------------------------------
>> From: "Marlon K. Schafer" <[EMAIL PROTECTED]>
>> Sent: Wednesday, October 01, 2008 9:59 AM
>> To: "WISPA General List" <wireless@wispa.org>
>> Subject: Re: [WISPA] Bad radio?
>>
>>   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" <wireless@wispa.org>
>> 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" <wireless@wispa.org>
>> 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" <wireless@wispa.org>
>> 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! 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/
> 


--------------------------------------------------------------------------------
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/

Reply via email to