A. IF
B. RF amplifier
C. Audio amplifier
D. Detector
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If a radio receiver amplifies all the signal frequencies equally well, it is said to have high ________________?
0
The letters AVC stand for ________________?
A. Sensitivity
B. Selectivity
C. Distortion
D. Fidelity
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In superhetrodyne receiver, the input at mixer stage is________________?
A. Audio voltage control
B. Abrupt voltage control
C. Automatic volume control
D. Automatic voltage control
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When the modulating signal controls the frequency of the carrier, we get______________?
A. IF and RF
B. RF and AF
C. IF and AF
D. RF and local oscillator signal
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The IF is 455 kHz. If the radio receiver is tuned to 855 kHz, the local oscillator frequency is _______________?
A. Phase modulation
B. Amplitude modulation
C. Frequency modulation
D. May be any one of the above
0
The function of ferrite antenna is to_________________?
A. 455 kHz
B. 1310 kHz
C. 1500 kHz
D. 1520 kHz
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A 100 V carrier is made to vary between 160 V and 40 V by the signal. What is the modulation factor ?
A. Reduce stray capacitance
B. Stabilise d.c. bias
C. Increase the Q of tuned circuit
D. Reduce noise
0
If Amin = 40 and Amax = 60, what is the percentage of modulation?
A. 3
B. 6
C. 5
D. None of the above
0
In a radio receiver, we generally use ………….. oscillator as a local oscillator
A. 20 %
B. 40 %
C. 50 %
D. 10 %
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