RF Test and Measurement

Specialized techniques and instruments for measuring performance at higher frequencies.

Phase Noise Measurement Methods and Techniques (2012)


Kay Gheen, Keysight

These slides from a webinar presentation give a detailed overview of the principles of measuring phase noise. The underlying relationships between phase noise spectral energy, demodulated phase noise, frequency etc. are described. The presentation also includes a description of the "modern" definition of phase noise along with current measurement techniques.

Choosing a Phase Noise Measurement Technique


Terry Decker and Bob Temple

These seminar notes give a good discussion of the principles of phase noise. Specifically the authors describe the difference between measuring phase noise directly or using phase/frequency demodulation techniques. The notes describe details about the limitations and equipment performance requirements for making phase noise measurements using a variety of techniques. Since these notes are from an older archive, the latest techniques involving the use of correlation are not described.

High Frequency Log Amps


Analog Devices

Logarithmic amplifiers provide an output voltage that is logarithmically scaled relative to the amplitude envelope of the input signal. Historically these have been used to provide logarithmic Y-axis scaling to spectrum analyzer displays, for example. This app note describes the basic block diagram and principles of operation of a log amplifier.

Connectors - Precision or Not?


Sathya Padmanabahn

These presentation notes describe some best practices and potential pitfalls of using "lab" versus "general" precision connectors in your testing environment. In this paper, "lab" precision generally refers to the air-dielectric 3.5-mm and 2.92-mm connectors, while "general" precision refers to SMA-style connectors.


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