John B. Rettig

Picosecond time interval measurements

Efficient measurement techniques have been developed to adequately characterize the performance of a new generation of programmable equivalent time sequential sampling oscilloscopes. These instruments provide time interval measurements with increased repeatability and accuracy. The same characterizations are applicable to more general time interval measurement, and subpicosecond repeatability for rise time measurement of fast step generators ( >

Measurements and characterization of multiple-coupled interconnection lines in hybrid and monolithic integrated circuits

(5)eI(t-TN)The delays are obtained from the measurements as the time differences between the exciting step and thevarious transitions in the far end port waveforms. All N eigenvalues are obtained by using these waveformsor the reflected signal with open ended transmission lines to enhance the sensitivity. Frequency domainresonance measurements can also be used for accurate evaluation of the eigenvalues. The temporally spreadmodal output is then given by,

Accuracy and Repeatability in Time Domain Network Analysis

This paper examines the importance of measurement repeatability in time domain network analysis and includes an analysis of the limitations imposed on theoretical accuracy by measurement noise. A closed-loop correction algorithm implemented in a fast, equivalent-time sampling, time domain reflectometer improves source timing accuracy, the dominant cause of nonrepeatability. An example measurement of attenuation in a 3.5 mm coaxial air-line demonstrates performance approaching this theoretical noise limit and the limits imposed by connector repeatability.