E8A01:

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

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

E8A02:

What type of wave has a rise time significantly faster than its fall time (or vice versa)?

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

E8A03:

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

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

E8A04:

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

E8A05:

What would be the most accurate way of measuring the RMS voltage of a complex waveform?

  1. By using a grid dip meter
  2. By measuring the voltage with a D'Arsonval meter
  3. By using an absorption wave meter
  4. By measuring the heating effect in a known resistor

E8A06:

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

E8A07:

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

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

E8A08:

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 of these choices are correct

E8A09:

How many levels can an analog-to-digital converter with 8 bit resolution encode?

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

E8A10:

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 of these choices are correct

E8A11:

What type of information can be conveyed using digital waveforms?

  1. Human speech
  2. Video signals
  3. Data
  4. All of these choices are correct

E8A12:

What is an advantage of using digital signals instead of analog signals to convey the same information?

  1. Less complex circuitry is required for digital signal generation and detection
  2. Digital signals always occupy a narrower bandwidth
  3. Digital signals can be regenerated multiple times without error
  4. All of these choices are correct

E8A13:

Which of these methods is commonly used to convert analog signals to digital signals?

  1. Sequential sampling
  2. Harmonic regeneration
  3. Level shifting
  4. Phase reversal