ECE :: Communication Systems
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At night the ionosphere can be considered to be consisting of
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Which one of the following is true?
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A 1000 kHz carrier wave modulated 40% at 40000 Hz is applied to a resonant circuit tuned to a carrier frequency and having Q = 140. What is the degree of modulator after transmission through the circuit?
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The EHT voltage in a picture tube of TV is
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In cellular telephone each cell is designed to handle
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A UPS contains
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A transmitter power of 10 W is increased by 30 dB. The effective radiated power is
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It is desired to couple a coaxial line to a two parallel wire line. It is best to use
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24 telephone channels are frequency division multiplexed using an SSB modulation. Assuming 3 kHz per channel, the required band width is
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A.
Characteristic impedance of twin wire feeder and coaxial cable are nearly the. same
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B.
The characteristic impedance of coaxial cable is more than that of twin wire cable
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C.
The characteristic impedance of twin wire cable is more than that of coaxial cable
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D.
The characteristic impedance of a twin wire feeder may be more or less than that of coaxial cable
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or P = 10000 W.