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Title: Phase Noise Measurements - Methods, Solutions, And Trends
Author: Karen R. Bonner
Source: 1985 Measurement Science Conference
Year Published: 1985
Abstract: In the past, phase noise measurements have required complex, dedicated instrumentation operated by highly specialized phase noise experts. As system requirements have changed, testing has become more widespread, and commercial measurement solutions are now available. This paper compares the four most common methods of measuring phase noise: 1) direct spectrum 2) heterodyne/counter 3) frequency discriminator and 4) phase detector. The advantages and disadvanta.- aes of each method are outlined, includ- 91 the most important parameter-for each : hod -- noise floor sensitivity. Knowing which method is optimum for a particular type of oscillator is useful in selecting a measurement system and differentiating between the noise floor of the measurement system versus the noise of the oscillator under test.

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