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Question 98 - HPE7-A01 discussion

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

* AP1 has a radio that generates a 16 dBm signal.

* AP2 has a radio that generates a 13 dBm signal.

* AP1 has an antenna with a gain of 8 dBi.

* AP2 has an antenna with a gain of 12 dBi. The antenna cable for AP1 has a 4 dB loss. The antenna cable for AP2 has a 3 dB loss.

What would be the calculated Equivalent Isotropic Radiated Power (EIRP) for AP1?

A.
-9 dBm
Answers
A.
-9 dBm
B.
20 dBm
Answers
B.
20 dBm
C.
40 dBm
Answers
C.
40 dBm
D.
15 dBm
Answers
D.
15 dBm
Suggested answer: B

Explanation:

The Equivalent Isotropic Radiated Power (EIRP) is the measured radiated power of an antenna in a specific direction. It is also called Equivalent Isotropic Radiated Power. It is the output power when a signal is concentrated into a smaller area by the Antenna. The EIRP can take into account the losses in transmission line, connectors and includes the gain of the antenna. It is represented in dB2. The formula for EIRP is:

EIRP=PTLc+Ga

where PT is the output power of the transmitter in dBm, Lc is the cable and connector loss in dB, and Ga is the antenna gain in dBi.

For AP1, the EIRP can be calculated as:

EIRP=164+8=20dBm

Therefore, the answer B is correct.

asked 16/09/2024
Raed Abu-Haija
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