Communication Systems VSB modulation is preferred in TV because It results in better reception It reduces the bandwidth requirement to half It avoids phase distortion at low frequencies None of these It results in better reception It reduces the bandwidth requirement to half It avoids phase distortion at low frequencies None of these ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is 16 1 15 8 16 1 15 8 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For a given carrier wave, maximum undistorted power is transmitted when value of modulation is 0.5 0.8 1 0.5 0.8 1 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems An audio signal (say from 50 Hz to 10000 Hz) is frequency translated by a carrier having a frequency of 106 Hz. The values of initial (without frequency translation) and final (after frequency translation) fractional change in frequency from one band edge to the other are 200 and 1.01 200 and 200 200 and 10.01 200 and 100.1 200 and 1.01 200 and 200 200 and 10.01 200 and 100.1 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The main function of a balanced modulator is to Produce 100% modulation Produce balanced modulation of a carrier wave Limit noise picked by a receiver Suppress carrier signal in order to create a single-sideband or double sideband Produce 100% modulation Produce balanced modulation of a carrier wave Limit noise picked by a receiver Suppress carrier signal in order to create a single-sideband or double sideband 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 4E 6E 2E 3E 4E 6E 2E 3E ANSWER DOWNLOAD EXAMIANS APP
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