Q1. The output power of an amplifier is 14dB higher than the input power of 120mW. What is the output power of the power amplifier?

Given that P dB = 10log (Pw/Pref)

Pw = Power in watt

Pref= reference power in watt.

My answer : Pdb = 10log(120mw/1) = -9.21 dB . Since it said that output power of an amplifier is 14dB higher than the input power , output power of the power amplifier = -9.21 + 14 = 4.79dB.

Q2. What is the EIRP of a 50 watt transmitter and a gain of 15dB?

Given that the formula for EIRP is EIRP = Pt * Gt

So EIRP = 15dB * 50w = 750dBw

Am I correct for both questions?

Given that P dB = 10log (Pw/Pref)

Pw = Power in watt

Pref= reference power in watt.

My answer : Pdb = 10log(120mw/1) = -9.21 dB . Since it said that output power of an amplifier is 14dB higher than the input power , output power of the power amplifier = -9.21 + 14 = 4.79dB.

Q2. What is the EIRP of a 50 watt transmitter and a gain of 15dB?

Given that the formula for EIRP is EIRP = Pt * Gt

So EIRP = 15dB * 50w = 750dBw

Am I correct for both questions?

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