A. IF
B. RF amplifier
C. Audio amplifier
D. Detector
Most of the amplification in a superhetrodyne receiver occurs at ______________stage? Read More »
Modulation and Demodulation A. Sensitivity
B. Selectivity
C. Distortion
D. Fidelity
A. Audio voltage control
B. Abrupt voltage control
C. Automatic volume control
D. Automatic voltage control
The letters AVC stand for ________________? Read More »
Modulation and Demodulation A. IF and RF
B. RF and AF
C. IF and AF
D. RF and local oscillator signal
In superhetrodyne receiver, the input at mixer stage is________________? Read More »
Modulation and Demodulation A. Phase modulation
B. Amplitude modulation
C. Frequency modulation
D. May be any one of the above
When the modulating signal controls the frequency of the carrier, we get______________? Read More »
Modulation and Demodulation A. 455 kHz
B. 1310 kHz
C. 1500 kHz
D. 1520 kHz
A. Reduce stray capacitance
B. Stabilise d.c. bias
C. Increase the Q of tuned circuit
D. Reduce noise
The function of ferrite antenna is to_________________? Read More »
Modulation and Demodulation A. 3
B. 6
C. 5
D. None of the above
A. 20 %
B. 40 %
C. 50 %
D. 10 %
If Amin = 40 and Amax = 60, what is the percentage of modulation? Read More »
Modulation and Demodulation A. Crystal
B. Wien-bridge
C. Phase-shift
D. Hartley
In a radio receiver, we generally use ………….. oscillator as a local oscillator Read More »
Modulation and Demodulation