Q. Johnson noise is

View solution

Q. Which of the following is unlikely to happen when quantising noise is decreased in PCM?

View solution

Q. For real and odd signals, the Fourier series coefficient an is

View solution

Q. An amplitude modulated wave is

e = 50 (1 + 0.4 cos 1000 t + 0.3 cos 10000 t) cos 10⁷ t

View solution

Q. The efficiency of a horn speaker is about

View solution

Q. In AM, if modulation index is more than 100%, then

View solution

Q. The width of air gap on recording head in a tape recorder is about

View solution

Q. In a stereo tape recorder the speed of the tape is

View solution

Q. Which of the following refers to SSB suppressed carrier amplitude modulated system?

View solution

Q. The frequency at which the piezoelectric effect occurs is primarily determined by

View solution

Q. In a 4-ary FSK, the frequencies are separated by fs. Then they are

View solution

Q. In cell communication, cell stands for

View solution

Q. In which of the following frequency bands are the standard AM radio broadcast stations?

View solution

Q. The frequency tolerance for the RF carrier in the standard AM radio broadcast band is

View solution

Q. If carrier is modulated by a digital bit stream having one of the possible phases of 0°, 90°, 180°, and 270°, then modulation is called

View solution

Q. In FM, the frequency deviation is

View solution

Q. If fh(t) is the Hilbert transform of f(t), and f(t) is a real valued signal, the pre-envelope of f(t) is

View solution

Q. Speech amplifiers are usually operated as

View solution

Q. In which frequency range is the noise figure in a transistor independent of frequency

View solution

Q. Which of the following is likely to be associated with FM radio broadcasting?

View solution