Q. An MTI compares a set of received echos with those received during the previous sweep.

View solution

Q. If e = 10 sin(10⁸ t + 3 sin 10⁴ t) then the deviation is

View solution

Q. When a complex signals is used to frequency modulate a carrier, the resulting sideband distribution is

View solution

Q. The output VR of the ratio detector is related with the output VF of similar Foster-Seeley discriminator as follows.

View solution

Q. In grid bias modulation system the power required for modulating amplifier

View solution

Q. In spread spectrum technique

View solution

Q. QAM stands for

View solution

Q. The bandwidth required for amplitude modulation is

View solution

Q. In a system using QASK and 4 bits to form a symbol, the required bandwidth is

View solution

Q. Each of the following statements regarding frequency modulation is true except

View solution

Q. Assertion (A): Radio transmission is by sky waves

Reason (R): Waves having frequencies higher than 30 MHz penetrate the atmosphere and do not return to earth.

View solution

Q. During playback the take up reel is

View solution

Q. To avoid objectionable noise in a microwave TV link, the SNR should be about

View solution

Q. Which one of the following is not necessarily an advantage of the phase cancellation method of obtaining SSB over the filter method?

View solution

Q. Pulse modulation is used in

View solution

Q. In an amplitude modulated waveform, the amplitude of the sideband is

View solution

Q. In communication systems the frequency range used for voice is

View solution

Q. As EM waves travel in free space they get

View solution

Q. Cross talk is due to reception of portions of a signal from one channel into another.

View solution

Q. If there are M equally likely and independent messages and M = 2ᴺ where N is an integer, the information in each message is equal to

View solution