Connections, Cables, Adapters, Attenuators, Probes, And Picoseconds

摘要

You must consider rise-time signal paths of less than 1 nsec as transmission lines. Connections, cables, adapters, attenuators, and probes represent discontinuities in this transmission line, deleteriously affecting its ability to faithfully transmit the desired signal. The degree of signal corruption that a given element contributes varies with its deviation from the transmission line's nominal impedance. The practical result of such aberrations is degradation of pulse rise time, fidelity, or both. Accordingly, you should minimize the introduction of elements or connections to the signal path and use high-grade components for connections and elements.