Effective Isotropic Radiated Power represents the effective radio transmission power after accounting for antenna gain and applicable transmission losses.
Proper EIRP configuration is essential for controlling wireless cell size, reducing interference, and supporting reliable client roaming.
HPE Aruba Networking recommends maintaining an appropriate power relationship between the 2.4 GHz, 5 GHz, and 6 GHz bands.
Its Campus Design Validated Solution Guide recommends that 5 GHz transmit power be at least 6 dB higher than 2.4 GHz power, while 6 GHz power should be equal to or no more than 3 dB higher than 5 GHz.
For a modern open-office environment, HPE documents the following example starting values:
Frequency band
Minimum
Maximum
2.4 GHz
6 dBm
9 dBm
5 GHz
15 dBm
18 dBm
6 GHz
18 dBm
21 dBm
Option D is closest because its 2.4 GHz maximum matches the documented recommendation, although its 3 dBm minimum is lower than HPE's example.
Option A incorrectly applies values recommended for 6 GHz to the 5 GHz band. Options B and C conflict with HPE's recommended power relationships.
The final values must be adjusted using RF measurements, building characteristics, client capabilities, and AirMatch optimization.
Official HPE Reference: HPE Aruba Networking ESP Campus Design Validated Solution Guide — Transmit Power Settings, ARM and AirMatch, page 39.
Aruba Networks
Verification finding: None of the four options reproduces HPE's published office starting values exactly. D is the strongest available approximation, not an exact official recommendation.
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