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ISRO EC 2018:Communication System Booster Quiz 2

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Question 1

A QPSK modulator has an input data rate of 90 Mbps and a carrier frequency 65 MHz. The minimum double sided Nyquist bandwidth is ________MHz.

Question 2

The maximum permissible duration between two samples of 4 kHz signal is

Question 3

Armstrong FM transmitter performs frequency multiplication in stages

Question 4

The bit rate of a digital communication system is 34M bits. The modulation scheme is QPSK. The baud rate of the system is

Question 5

If band width required to transmit BPSK signal is 1000 KHz. than the band width required for Q ary PSK transmission is

Question 6

A signal input to an ideal amplifier is 0 dBm where as the noise input is 0.1

.The SNR at the output of the amplifier is __________dB.

Question 7

In a 64 step binary PCM system with a reference scale from 0 to 6.4 Volts, the RMS quantization error will be

Question 8

The pulse rate in a delta modulation system is 84000 pulse/sec. For the input signal of

, the optimum value of step size to prevent slope overload distortion is_________V.

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Feb 12ESE & GATE EC