Communication Systems - Study Mode
[#91] If f c is the carrier wave frequency and f m is the modulation frequency, then in the resulting amplitude modulated waveform the upperside band consists of:
Correct Answer
(C) f c + f m
[#92] For identical total transmitted power, the ratio of S/N for wide band FM to S/N of DSB-AM (with m a = 1) is: (Given f m = 15 KHz & frequency deviation = ±75 KHz)
Correct Answer
(A) 112.5
[#93] The surface wave eventually disappears as one moves away from the transmitter because of
Correct Answer
(A) Absorption by ground
[#94] Which of the following is not true?
Correct Answer
(B) Thermal agitation noise is also known as shot noise
[#95] The amount of frequency deviation in FM signal depends on
Correct Answer
(A) Amplitude of the modulating signal