What technique shows that a square wave is made up of a sine wave and its odd harmonics?

1. A Fourier analysis
2. B Vector analysis
3. C Numerical analysis
4. D Differential analysis

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

1. A Successive approximation
2. B Harmonic regeneration
3. C Level shifting
4. D Phase reversal

Which of the following describes a signal in the time domain?

1. A Power at intervals of phase
2. B Amplitude at different times
3. C Frequency at different times
4. D Discrete impulses in time order

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

1. A An abnormal condition where the converter cannot settle on a value to represent the signal
2. B A small amount of noise added to the input signal to reduce quantization noise
3. C An error caused by irregular quantization step size
4. D A method of decimation by randomly skipping samples

What is the benefit of making voltage measurements with a true-RMS calculating meter?

1. A An inverse Fourier transform can be used
2. B The signal's RMS noise factor is also calculated
3. C The calculated RMS value can be converted directly into phasor form
4. D RMS is measured for both sinusoidal and non-sinusoidal signals

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

1. A 2.5 to 1
2. B 25 to 1
3. C 1 to 1
4. D 13 to 1

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

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

Why are direct or flash conversion analog-to-digital converters used for a software defined radio?

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

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

1. A 8
2. B 8 multiplied by the gain of the input amplifier
3. C 256 divided by the gain of the input amplifier
4. D 256

What is the purpose of a low-pass filter used at the output of a digital-to-analog converter?

1. A Lower the input bandwidth to increase the effective resolution
2. B Improve accuracy by removing out-of-sequence codes from the input
3. C Remove spurious sampling artifacts from the output signal
4. D All these choices are correct

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

1. A Total harmonic distortion
2. B Peak envelope power
3. C Reciprocal mixing
4. D Power factor