Q.1.
If a radio receiver amplifies all the signal frequencies equally well, it is said to have high ___________
Q.2.
In amplitude modulation, bandwidth is ___________ the audio signal frequency
Q.3.
In amplitude modulation, bandwidth is ___________ the audio signal frequency
Q.4.
AV carrier is made to vary betweenV andV by the signal. What is the modulation factor?
Q.5.
In TV transmission, picture signal is ___________ modulated
Q.6.
The superhetrodyne principle provides selectivity at ___________ stage
Q.7.
Most of the amplification in a superhetrodyne receiver occurs at ___________ stage
Q.8.
In TV transmission, sound signal is ___________ modulated
Q.9.
Man made noise are ___________ variations.
Q.10.
If modulation isthen signal amplitude is ___________ carrier amplitude
Q.11.
Overmodulation (amplitude) occurs when signal amplitude is ___________ carrier amplitude
Q.12.
If level of modulation is increased ___________ power is increased
Q.13.
In a transmitter ___________ oscillator is used
Q.14.
Atmodulation, the power in each sideband is ___________ of that of carrier
Q.15.
Superhertodyne principle refers to
Q.16.
In the above question, what is the power in sidebands?
Q.17.
Demodulation is done in ___________
Q.18.
In a superhetrodyne receiver, the difference frequency is chosen as the IF rather than the sum frequency because ___________
Q.19.
In fiber optics, the signal is _______ waves.
Q.20.
High data rate digital communication needs to operate on which end of the frequency spectrum?