Q. In FDM systems used for telephone, which modulation scheme is adopted?

View solution

Q. In the above case if another sine wave corresponding to 40% modulation is transmitted simultaneously, the total radiated power will be

View solution

Q. A pre-emphasis circuit

View solution

Q. In orthogonal BFSK, the energy of information bearing term is

View solution

Q. In a tape recorder

View solution

Q. In the spectrum of an FM wave

View solution

Q. The reactance of bypass capacitor in a CE amplifier circuit should be

View solution

Q. In a radar system the solution to blind speed problem is to

View solution

Q. For a FM wave carrier modulating frequency is 10 kHz and bandwidth is 2 MHz. If the modulating signal amplitude is doubled, the bandwidth will be

View solution

Q. In band III of TV, distant reception (beyond line of sight range) is possible due to

View solution

Q. In FM noise can be decreased by a feature that AM does not have

View solution

Q. In case of stabilized reactance modulator AFC system

View solution

Q. Assertion (A): Demodulation of SSB and AM signals is exactly similar

Reason (R): The basic SSB demodulation device is product detector.

View solution

Q. In shot noise

View solution

Q. In VCR, the chrominance signal's frequency is

View solution

Q. Which of the following cannot be used to demodulate SSB?

View solution

Q. The power required to produce a gain of 10 dB over 4 W of original power is __________ watt.

View solution

Q. The inductance of connecting leads can be a source of

View solution

Q. For F2 layer the critical frequency is about

View solution

Q. At a given probability of error, binary coherent FSK is interior to binary coherent PSK by

View solution