Communication Systems In Modulation, “carrier” is Resultant wave Voltage with constant frequency, phase or amplitude Speech voltage to be transmitted Voltage for which frequency, phase or amplitude is varied Resultant wave Voltage with constant frequency, phase or amplitude Speech voltage to be transmitted Voltage for which frequency, phase or amplitude is varied ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In a TV receiver antenna the length of reflector rod May be equal, more or less than that of dipole Is more than that of dipole Is less than that of dipole Is the same as that of dipole May be equal, more or less than that of dipole Is more than that of dipole Is less than that of dipole Is the same as that of dipole ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The disadvantage of FM over AM is that High modulating power is needed Noise is very high for high frequency High output power is needed Large bandwidth is required High modulating power is needed Noise is very high for high frequency High output power is needed Large bandwidth is required ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as 6E 2E 3E 4E 6E 2E 3E 4E ANSWER DOWNLOAD EXAMIANS APP
Communication Systems VSB modulation is preferred in TV because It avoids phase distortion at low frequencies It reduces the bandwidth requirement to half It results in better reception None of these It avoids phase distortion at low frequencies It reduces the bandwidth requirement to half It results in better reception None of these ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In case of low level amplitude modulation system, the amplifiers following the modulated stage must be Non-linear devices Linear devices Harmonic devices Class C amplifiers Non-linear devices Linear devices Harmonic devices Class C amplifiers ANSWER DOWNLOAD EXAMIANS APP
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