What would be the calculated Equivalent Isotropic Radiated Power (EIRP) for APT?

You are doing tests in your lab and with the following equipment specifications

* AP1 has a radio that generates a 10 dBm signal

* AP2 has a radio that generates a 11 dBm signal

* AP1 has an antenna with a gain of 9 dBi

* AP2 has an antenna with a gain of 12 dBi.

* The antenna cable for AP1 has a 2 dB loss

* The antenna cable for AP2 has a 3 dB loss

What would be the calculated Equivalent Isotropic Radiated Power (EIRP) for APT?
A . 26 dBm
B. 30 dBm
C. 17 dBm
D. -12 dBm

View Answer

Answer: B

Explanation:

The calculated Equivalent Isotropic Radiated Power (EIRP) for AP1 is 30 dBm. EIRP is the product of the transmitter power (in dBm) and the antenna gain (in dBi) minus the cable loss (in dB). For AP1, EIRP = 10 dBm + 9 dBi – 2 dB = 17 dBm. For AP2, EIRP = 11 dBm + 12 dBi – 3 dB = 20 dBm.

References:

https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/wlan-rf/rf-fundam

https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/wlan-rf/eirp.htm