Implementing Cisco Wireless Network Fundamentals (WIFUND, legacy) — Question 81

An installation uses a 21dBi parabolic dish. It is connected to the 802.11n radio via low loss antenna coax rated at 4dB loss/100 feet. After testing, it has been determined that 2mW of power will be lost in the cable. An EIRP producing 200mW is desired. What should the transmit power be set to?

Answer options

• A. 8mW
• B. 3dBm
• C. 3.16mW
• D. 5mW

Correct answer: C

Explanation

To achieve the desired EIRP of 200mW after accounting for the 2mW loss in the cable, the transmit power must be set to 3.16mW. This is calculated by adding the 2mW loss to the effective output needed to reach 200mW. The other options do not account for the necessary power adjustment to reach the desired EIRP.