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Keysight Technologies
High Precision Time Domain
Reflectometry (TDR)
Application Note
Introduction
High performance communications systems require a quality
Techniques for achieving the
transmission path for electrical signals. For efficient signal flow
highest possible accuracy
and high signal integrity, the transmission path impedance should and resolution in signal
be kept as close to a constant, ideal value as possible. Time integrity impedance
Domain Reflectometry (TDR) is a well-established technique for measurements
verifying the impedance and quality of signal paths in
components, interconnects, and transmission lines.
As data rates increase and component geometries decrease, the
precision and resolution of the basic TDR measurement system
can be strained. This application note will review measurement
system limitations and the sources of measurement errors.
Practical techniques and useful methods to enhance precision will
be reviewed.
Specific topics include: