VSB modulation is preferred in TV because It results in better reception None of these It avoids phase distortion at low frequencies It reduces the bandwidth requirement to half TRUE ANSWER : ? YOUR ANSWER : ?
If in a broadcasting studio, a 1000 kHz carrier is modulated by an audio signal of frequency range 100-5000 kHz, the width of channel is __________ kHz. 10 995 5 4.9 TRUE ANSWER : ? YOUR ANSWER : ?
The disadvantage of FM over AM is that Large bandwidth is required Noise is very high for high frequency High output power is needed High modulating power is needed TRUE ANSWER : ? YOUR ANSWER : ?
Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation. Both A and R are correct but R is not correct explanation of A A is wrong but R is correct A is correct but R is wrong Both A and R are correct and R is correct explanation of A TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following is analog? Differential PCM PWM Delta modulation PCM TRUE ANSWER : ? YOUR ANSWER : ?
One of the advantages of base modulation over collector modulation of a transistor class C amplifier is The lower modulating power requirement Better linearity Improved efficiency High power output per transistor TRUE ANSWER : ? YOUR ANSWER : ?
The characteristic impedance of a twin wire feeder used for TV signals is about 100 ohm 500 ohm 300 ohm 1000 ohm TRUE ANSWER : ? YOUR ANSWER : ?
As per Shannon-Hartley theorem, a noise less Gaussian channel has None of these Small capacity Zero capacity Infinite capacity TRUE ANSWER : ? YOUR ANSWER : ?
If sampling is done at the rate of 10 kHz. The bandwidth required is 70 kHz 35 kHz 10 kHz 1280 kHz TRUE ANSWER : ? YOUR ANSWER : ?
In case of frequency modulation, modulating voltage remains constant if the modulating frequency is lowered, then Amplitude of distant sidebands decreases Amplitude of distant sidebands remains constant Amplitude of distant sidebands increases Amplitude of distant sidebands first increases, then decreases TRUE ANSWER : ? YOUR ANSWER : ?