1. The received power at a receiver antenna is -38 dBm. If the system impedance

Question

1. The received power at a receiver antenna is -38 dBm. If the system impedance is 50 Ohms, what is the voltage at the receiver antenna?

A. 2815 mVrms

B. 2.815 mVrms

C. 89 mVrms

D. 0.089 mVrms

A. 1

B. 10

C. 100

D. 1000

3. For a single-tone modulating signal of 5 kHz and a carrier frequency of 200 kHz, what are the frequencies in the spectra of a conventional AM output?

A. 195 kHz only

B. 205 kHz only

C. 195 and 205 kHz

D. 195, 200, and 205 kHz

4.What is the transmission bandwidth for a DSB system with a baseband signal of near dc to 100 kHz and a carrier input of 3 MHz?

A. 100kHz

B. 6 MHz

C. 2.9 MHz

D. 200 kHz

Explanation / Answer

1. a

2. c

3. d

4. c

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