Communication Systems The modulation index of an FM is changed from 0 to 1. How does the transmitted power change? Gets doubled Gets halved Gets increased by 50 percent Remains unchanged Gets doubled Gets halved Gets increased by 50 percent Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For attenuation of high frequencies we should use Inductance Shunt capacitance Resistance Series capacitance Inductance Shunt capacitance Resistance Series capacitance ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Which of the following is an indirect way of generating FM? Armstrong modulator Reactance FET modulator Reactance bipolar transistor Varactor diode modulator Armstrong modulator Reactance FET modulator Reactance bipolar transistor Varactor diode modulator ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Which of the following is a digital modulation technique? DM PCM All PSK DM PCM All PSK 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 200 200 and 10.01 200 and 1.01 200 and 100.1 200 and 200 200 and 10.01 200 and 1.01 200 and 100.1 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The main function of a balanced modulator is to Produce balanced modulation of a carrier wave Suppress carrier signal in order to create a single-sideband or double sideband Limit noise picked by a receiver Produce 100% modulation Produce balanced modulation of a carrier wave Suppress carrier signal in order to create a single-sideband or double sideband Limit noise picked by a receiver Produce 100% modulation ANSWER DOWNLOAD EXAMIANS APP
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