What is the name of the process that shows that a square wave is made up of a sine wave plus all its odd harmonics?

  1. Fourier analysis
  2. Vector analysis
  3. Numerical analysis
  4. Differential analysis


Which of the following is a type of analog-to-digital conversion?

  1. Successive approximation
  2. Harmonic regeneration
  3. Level shifting
  4. Phase reversal


What type of wave does a Fourier analysis show to be made up of sine waves of a given fundamental frequency plus all its harmonics?

  1. A sawtooth wave
  2. A square wave
  3. A sine wave
  4. A cosine wave


What is "dither" with respect to analog-to-digital converters?

  1. An abnormal condition where the converter cannot settle on a value to represent the signal
  2. A small amount of noise added to the input signal to allow more precise representation of a signal over time
  3. An error caused by irregular quantization step size
  4. A method of decimation by randomly skipping samples


What of the following instruments would be the most accurate for measuring the RMS voltage of a complex waveform?

  1. A grid dip meter
  2. A D'Arsonval meter
  3. An absorption wave meter
  4. A true-RMS calculating meter


What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?

  1. 2.5 to 1
  2. 25 to 1
  3. 1 to 1
  4. 100 to 1


What determines the PEP-to-average power ratio of a single-sideband phone signal?

  1. The frequency of the modulating signal
  2. Speech characteristics
  3. The degree of carrier suppression
  4. Amplifier gain


Why would a direct or flash conversion analog-to-digital converter be useful for a software defined radio?

  1. Very low power consumption decreases frequency drift
  2. Immunity to out-of-sequence coding reduces spurious responses
  3. Very high speed allows digitizing high frequencies
  4. All these choices are correct


How many different input levels can be encoded by an analog-to-digital converter with 8-bit resolution?

  1. 8
  2. 8 multiplied by the gain of the input amplifier
  3. 256 divided by the gain of the input amplifier
  4. 256


What is the purpose of a low-pass filter used in conjunction with a digital-to-analog converter?

  1. Lower the input bandwidth to increase the effective resolution
  2. Improve accuracy by removing out-of-sequence codes from the input
  3. Remove harmonics from the output caused by the discrete analog levels generated
  4. All these choices are correct


Which of the following is a measure of the quality of an analog-to-digital converter?

  1. Total harmonic distortion
  2. Peak envelope power
  3. Reciprocal mixing
  4. Power factor