Communication Systems The disadvantage of FM over AM is that Noise is very high for high frequency Large bandwidth is required High modulating power is needed High output power is needed Noise is very high for high frequency Large bandwidth is required High modulating power is needed High output power is needed ANSWER DOWNLOAD EXAMIANS APP
Communication Systems When the length of antenna is a whole wavelength The radiation is zero in all directions The radiation at right angles is maximum The radiation at right angles is zero The radiation is maximum in all directions The radiation is zero in all directions The radiation at right angles is maximum The radiation at right angles is zero The radiation is maximum in all directions ANSWER DOWNLOAD EXAMIANS APP
Communication Systems One of the advantages of base modulation over collector modulation of a transistor class C amplifier is Improved efficiency Better linearity The lower modulating power requirement High power output per transistor Improved efficiency Better linearity The lower modulating power requirement High power output per transistor ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In Modulation, “carrier” is Voltage for which frequency, phase or amplitude is varied Speech voltage to be transmitted Voltage with constant frequency, phase or amplitude Resultant wave Voltage for which frequency, phase or amplitude is varied Speech voltage to be transmitted Voltage with constant frequency, phase or amplitude Resultant wave ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For a given carrier wave, maximum undistorted power is transmitted when value of modulation is 1 0.8 0.5 1 0.8 0.5 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems VSB modulation is preferred in TV because It reduces the bandwidth requirement to half It avoids phase distortion at low frequencies It results in better reception None of these It reduces the bandwidth requirement to half It avoids phase distortion at low frequencies It results in better reception None of these ANSWER DOWNLOAD EXAMIANS APP
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