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Correlations 2 : Communications 2nd Sem 2526
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Calculate power in each sideband, if power of carrier wave is 176W and there is 60% modulation in amplitude modulated signal?
A 400W carrier wave is modulated to a depth of 65%. Find the total power of modulated wave?
The maximum power efficiency of an AM modulator is?
If modulation index of an AM wave is increased from 0.5 to 1, then the transitted power ________
If the modulating frequency of a carrier wave varies between 700Hz and 7KHz, find it’s bandwidth?
If modulation index of an AM wave is increased from 0.65 to 0.9, then the transitted power ________
A frequency of 1 MHz has a wavelength of approximately
A 1000 ohm resistor operates at room temperature (30 deg C). How much noise power does it provide to a matched load over the bandwidth of 500kHz?
A parallel tuned circuit, having a Q of 100, is resonated to 300MHz with a 40 pF capacitor. If this circuit is maintained at 37°C. What noise voltage will a wideband voltmeter measure when placed across it?
A microwave antenna (Teq = 35K) is coupled through a network (Teq = 40 K) to a microwave receiver with Teq = 50 K referred to its input. Determine the receiver's noise figure.