Just a short post to share a simple table that I knocked up for quickly referencing Cisco AP TX power levels (1-8 as shown on a WLC) to what they actually mean in terms of dBm.
This information can be handy for when building RF profiles for a specific environment or group of AP’s and also for validating that real world output powers match expectations for an AP, especially when you take into account the slightly higher permitted EIRP levels for the UNII-2 Extended band in most EU domain countries.
At the moment it only covers the 3602i-E and 1602i-E as those are what we are commonly using in our networks at the moment, I will add 1142n-E and 3502i-E at some point when I get a chance to extract the data from a WLC with some attached!
If anybody wants to do this themselves then simply run the following command on a WLC running 7.2.x or higher code:
"show advanced 802.11a txpower" For 5GHz Band
"show advanced 802.11b txpower" For 2.4GHz Band
Download the excel file from here.
If anybody wants to contribute some more data for this maybe I could put it into a Google Docs spreadsheet or something that allows people to easily add / update data.