The device which superimposes information onto a high frequency signal for trans

Question

The device which superimposes information onto a high frequency signal for transmission is called: i. a demodulator ii. the carrier iii. a modulator iv. the intelligence b) The two types of angle modulation are: i. amplitude and frequency modulation ii. phase and frequency modulation iii. pulse and frequency modulation iv. phase and amplitude modulation c) In an FM modulator, the amplitude of the intelligence signal determines the: i. rate of the carrier frequency deviation. ii. power level of the FM signal. iii. phase angle of the carrier frequency component. iv. amount of carrier frequency deviation. d) Overmodulation: i. results when the modulation index exceeds unity ii. is undesirable because it produces sideband splatter iii. causes the AM signal to become distorted so that the receiver cannot produce clean replica of the original intelligence signal iv. all of the above e) Which of the following is an advantage of transmitting in a digital format? i. less sensitive to noise ii. less crosstalk iii. lower distortion levels iv. all of the above

Explanation / Answer

a) modulator

b) phase and frequency modulation

c) rate of carrier frequency deviation

d) all of the above

e) all of the above

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