Digital signal: answers

I. Sampling a signal is equivalent to retain samples:

  1. continuously
  2. with a constant period
  3. in a random way

II. The mathematic expression of a sampled signal is:

  1. a differential equation
  2. a recurrence equation
  3. a second-order equation

III. The sample period is the period which separate:

  1. 2 periods
  2. 2 samples
  3. 2 amplitudes

IV. The Fourier transform of a Dirac "comb" is:

  1. a cardinal sine
  2. a Dirac impulse
  3. a Dirac "comb"

V. Let follow this sampled signal, give its sampling period:

  1. 1
  2. 500
  3. 125


Texte - Copyright © 1996, 1997 DECLE & BURTAIRE