A contractor sets 20 dBm conducted power into a 6 dBi antenna with 1 dB jumper loss and claims the link stays under a 20 dBm EIRP limit. What is the expert compliance finding?
Select an answer to reveal the explanation.
Short Explanation
EIRP is conducted power plus antenna gain minus cable loss — here that's about 25 dBm, over a 20 dBm cap. Turn down the radio or the gain. Antenna gain isn't free money the regulator ignores.
Full Explanation
Equivalent isotropically radiated power is approximated as conducted transmit power plus antenna gain minus feed-line/connector losses. With 20 dBm conducted, 6 dBi gain, and 1 dB loss, EIRP is about 25 dBm. That exceeds a 20 dBm EIRP limit, so the design must lower conducted power or antenna gain to remain compliant.