05-19-2019 12:28 PM - edited 07-05-2021 10:26 AM
After a survey we placed 12 access points in our warehouse. 3802's with 4x AIR-ANT2535SDW-R dipole antenna's each. In the WLC (2504 wlc) antenna gain is set to 6x0,5dBi for each accesspoint.
We are using 2.4ghz only, 5ghz has been disabled (but when I enabled it I saw simular results)
I walked around in our warehouse checking the WLC client page and noticed that I never got a better RSSI then -60 dBi at best (8 meters from the accesspoint hanging on the ceiling) this is more or less the same for every accesspoint.
I manually adjusted powerlevel for the 2.4ghz antenna's to 2 (it was 4,5 or 6 for all accesspoints), so I expected a huge increase of the RSSI, nope.. -55dBi at best from that 8 meter of those accesspoints.
I then got into a forklift and got close to 1 meter of that accesspoint (powerlevel still set to 2), RSSI went up to -45dBi, still far from what I expected. (I was expecting something in the area of -35 or even -30 when being so close to the AP)
any idea where this problem is coming from?
Thanks a million!
05-19-2019 07:01 PM
Hi Bartvdm,
When you said "I manually adjusted powerlevel for the 2.4ghz antenna's to 2", did you mean the power is 2/7 (17dBm)?
05-20-2019 02:31 AM - edited 05-20-2019 02:33 AM
Hi fdharmawan That is correct
Tx Power Num Of Supported Power Levels ............. 7
Tx Power Level 1 .......................... 18 dBm
Tx Power Level 2 .......................... 15 dBm
Tx Power Level 3 .......................... 12 dBm
Tx Power Level 4 .......................... 9 dBm
Tx Power Level 5 .......................... 6 dBm
Tx Power Level 6 .......................... 3 dBm
Tx Power Level 7 .......................... 2 dBm
Tx Power Configuration .................... MANUAL
Current Tx Power Level .................... 2
05-20-2019 07:13 PM
Hi Bart,
Any reason why did you raise the tx power level to such high level? If you complain about the RSSI around -60dBm, may I know what is wrong with that? I guess -60dBm falls on good-to-perfect signal. The WiFi signal meter is still full bar, right? Do you have any connectivity issue such as ping over 10ms or traffic performance?
If I were you, I would not set the power manually and let the RRM does the job. Besides, sometimes the greater the power might not equals to better WiFi signal.
05-20-2019 07:15 PM
And one more thing. RSSI is client stand point. The AP might 'see' your laptop but your laptop wireless NIC might not 'see' the AP. I forgot the term in this but your laptop's wireless NIC have a range too.
05-20-2019 01:29 AM
05-20-2019 02:34 AM
because I did a survey, and the results where dramatic, coverage would not go below -60 is 95% of the warehouse
05-20-2019 04:30 AM
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