Communication Systems If output power of a radio receiver is doubled, its volume is increased by __________ dB. 3 1 -3 2 3 1 -3 2 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Which of the following does not cause losses in optical fibre cables? Microbending Stepped index operation Impurities Attenuation in glass Microbending Stepped index operation Impurities Attenuation in glass ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In EM waves, polarization Is caused by reflection Is always vertical in an isotropic medium Results from longitudinal nature of waves Is due to transverse nature of waves Is caused by reflection Is always vertical in an isotropic medium Results from longitudinal nature of waves Is due to transverse nature of waves ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The disadvantage of FM over AM is that Large bandwidth is required High output power is needed Noise is very high for high frequency High modulating power is needed Large bandwidth is required High output power is needed Noise is very high for high frequency High modulating power is needed ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In practical commercial FM system, channel bandwidth is 150 kHz 108 MHz 88 MHz 100 kHz 150 kHz 108 MHz 88 MHz 100 kHz 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 100.1 200 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 ANSWER DOWNLOAD EXAMIANS APP
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