When calculating the link budget for a wireless point-to-point bridge, the engineer notices that one antenna has its gain marked as 2.85 dBd. With a 20- mW access point and 3-dBi loss for the cable, what is the approximate EIRP?

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1. Explanation: First calculate the dBi from the dBd: 2.85 + 2.14 = 4.99 (round up to 5) dBi

   Then, calculate the initial dB that comes out of the AP:
   1mw = 0dB
   10mw = 10dB
   20mw = 13dB

   And now calculate everything together:
   13dB – 3dBi + 5dBi = 15dBm

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