Extra Class

Which of the following components can be used to reduce thermal drift in crystal oscillators?

What type of frequency synthesizer circuit uses a phase accumulator, lookup table, digital-to-analog converter, and a low-pass anti-alias filter?

What information is contained in the lookup table of a direct digital synthesizer (DDS)?

What are the major spectral impurity components of direct digital synthesizers?

Which of the following ensures that a crystal oscillator operates on the frequency specified by the crystal manufacturer?

Which of the following is a technique for providing highly accurate and stable oscillators needed for microwave transmission and reception?

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

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

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

What is “dither” with respect to analog-to-digital converters?

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

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

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

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

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

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

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

What is the modulation index of an FM signal?

How does the modulation index of a phase-modulated emission vary with RF carrier frequency?

What is the modulation index of an FM phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency if the highest modulating frequency is 1000 Hz?