Wireless Access

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Frequent Contributor II
Posts: 104
Registered: ‎02-25-2011

AP-135 MAX EIRP for 2.4ghz in UK

Hi,

 

I have a number of AP-135's in the UK, that are showing their MAX EIRP as 15.5 for the 2.4ghz radio on the controller.  My understanding is that for the UK, the max EIRP is 20dBm, so I'm curious as to why these AP's MAX is 15.5

 

Can anyone explain ?

 

Thanks

 

Lee

Aruba
Posts: 185
Registered: ‎04-27-2009

Re: AP-135 MAX EIRP for 2.4ghz in UK

Due to (radio specific) out-of-band and band-edge emissions, there's typically a need to apply additional power restrictions in addition to the well-known and generic in-band power limit of 20dBm. Radios do not behave ideally, and will emit amount of (unwanted) energy outside of the WiFi bands. These energy levels need to be below well defined levels to meet regulatory rules (in this case ETSI), and in order to achieve that, the maximum radio power level may need to be reduced below the 20dBm level.

 

When the AP-135 was first released, the initial regulatory tests resulted in a (conservative) limit in the 2.4GHz band of 15.5dBm for ETSI countries. Later SW tweaks and updated tests, allow us to increase this to 19.5dBm.

 

The new regulatory limits will be implemented in AOS 6.2 (and supposedly in 5.0 and 6.1 patches as well).

 

/Onno
Frequent Contributor II
Posts: 104
Registered: ‎02-25-2011

Re: AP-135 MAX EIRP for 2.4ghz in UK

Hi,

 

That's interesting, thanks for the information.

 

I'm currently running 6.1.3.3.   Is there a recommended release of code currently available  that increases the EIRP to 19.5 ?

 

Thanks

 

Lee

Aruba
Posts: 185
Registered: ‎04-27-2009

Re: AP-135 MAX EIRP for 2.4ghz in UK

There's no current 6.1 release to implement that AFAIK. Let me find out what the plans are to make this available in 6.1.

/Onno
Aruba
Posts: 185
Registered: ‎04-27-2009

Re: AP-135 MAX EIRP for 2.4ghz in UK

Sorry for the long delay. The current intention is to address this in 6.1.3.6.

/Onno
Frequent Contributor II
Posts: 104
Registered: ‎02-25-2011

Re: AP-135 MAX EIRP for 2.4ghz in UK

Ok, thanks for the update.

 

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