51. When the length of antenna is a whole wavelength
52. Under ordinary circumstances, impulse noise can be reduced in
53. Which of the following is used to generate PDM?
54. A zero mean white Gaussian noise is passed through an ideal low pass filter of bandwidth 10 kHz. The output of the samples so obtained would be
55. A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is
56. For a low level AM system, the amplifiers modulated stage must be
57. In case of low level amplitude modulation system, the amplifiers following the modulated stage must be
58. Commercial Frequency deviation of FM is
59. An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.
60. In any system, excessive bandwidth is avoided because:
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