C:-Interrupt request

D:-Both interrupt request and reset

Correct Answer:- Option-A
Question57:-What is the ೧೯೯೫೧೯ frequency in an AM wave when its highest frequency component is 850 Hz and the
bandwidth of the signal is 50 Hz 7

A:-80 Hz

B:-695 Hz

C:-625 Hz

D:-825 Hz

Correct Answer:- Option-D
Question58:-A 100 MHz carmier is frequency modulated by 10 KHz wave. For a frequency deviation of 50 KHz, calculate the
modulation index of the FM signal.

A:-100

B:-50

C:-70

D:-90

Correct Answer:- Option-B
Question59:-After passing the FM signal through mixer, what is the change in the frequency deviation A when the
modulating frequency is doubled 7

A:-Becomes 24
B:-Becomes A2

2
C:-Becomes A
D:-Remains unchanged
Correct Answer:- Option-D
Question60:-Pre emphasis is done
A:-For boosting of medulating signal voltage
B:-For modulating signals at higher frequencies
C:-In FM before modulation
D:-All of the above
Correct Answer:- Option-D
Question61:-What is the DFT of the four point sequence x(n} = {0, 1, 2, 3} 7
2:-(8, -2 4 2-2, 221
8:-6, 2-2), 2, -2+2j}
€-8, 252], 2, 2೨೫)
೧:-(6, 2-2)
Correct Answer:- Option-C
Question62:-Which kind of polarization is provided by helical antennas 7
ular
B:-Elliptical
C:-Plane circular
D:-All of the above
Correct Answer:- Option-A
Question63:-Which has same probability of error 7
A:-BPSK and QPSK
B:-BPSK and ASK
C:-BPSK and PAM
D:-BPSK and QAM
Correct Answer:- Option-C
Question64:-In MSK, the difference between the higher and lower frequency is
A:-Same as the bit rate
B:-Four time the bit rate
C:-Twice of the bit rate
D:-Half of the bit rate
Correct Answer:- Option-D
Question65:-The data rate of QPSK is of BPSK.
A:-Thrice
B:-Twice
C:-Four times
D:-Same