Academic help online

Posted on October 24, 2016

Academic help online
An AM broadcast transmitter is tested by feeding the RF output into a 50-Ω (dummy) load. Tone modulation is applied. The carrier frequency is 850 kHz and the FCC licensed power output is 5,000 W. The sinusoidal tone of 1,000 Hz is set for 90% modulation.
(a) Evaluate the FCC power in dBk (dB above 1 kW) units.
(b) Write an equation for the voltage that appears across the 50-Ω load, giving numerical values for all constants.
(c) Sketch the spectrum of this voltage as it would appear on a calibrated spectrum analyzer.
(d) What is the average power that is being dissipated in the dummy load?
(e) What is the peak envelope power?

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