What's the difference between the power value and EIRP

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When you check the configurable power value and compare this with the EIRP(after clicking an AP) there's always a few dB difference between both. Pe. an AP with the allowed maximum of 20 dB is showing an EIRP of 25 in BG and 26 in A. What's this EIRP value telling and is this a problem? We are using AP121.
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Stelef

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Posted 3 years ago

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Mike Kouri, Official Rep

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Steven,
First off, no this is not a problem. 

Each regulatory domain (ie FCC, EU, Japan, etc) has their own rules regarding maximum power allowed. Think of the power setting as a volume knob. 20 is the maximum you are allowed in your own regulatory domain. The actual transmitted power at value 20 in the FCC domain will be different than 20 in Japan. Further muddying the waters, allowed power levels are different for the 2.4 vs 5GHz ranges.

An open question to you and all the other lurkers on this thread: Would it be more intuitive if we changed this in a future release to range between 0 and 100? How about if the accompanying text in HiveManager said that this was the percentage of the maximum power allowed within the regulatory domain?
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Stelef

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Hi Mike, Thanks for the reply. If this is the case, in my opinion it would be more intuitive if it's a value between 0 and 100(a percentage of the maximum allowed power). How can we know the exact power (in dB) emitted?
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Mike Kouri, Official Rep

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Steven, Thanks for the feedback, we will keep that in mind in future developments.

Regarding seeing the actual power, try this command for both wifi0 and wifi1:


kouri-desk-230#sh int wifi1 | i eirp
Freq(Chan)=5500Mhz(100); EIRP power=11.27dBm; Diversity=disabled;