E8A01:

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

E8A02:

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

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

E8A03:

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

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 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

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. Speech characteristics
3. The degree of carrier suppression
4. 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 these choices are correct

E8A09:

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

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 these choices are correct

E8A11:

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