Return Loss: What, Why, How, and Where

This paper discusses aspects of return loss and signal integrity in serial digital video systems. Return loss goes beyond just SDI interfaces. It is a factor in all high speed transmission systems. This paper demonstrates some of the causes of return loss errors, and how to mitigate them. Test equipment will be discussed for measuring return loss, and locating the cause of return loss errors. Simulation is demonstrated as a low cost tool for self-education and experimentation, to research return loss issues and possible mitigation options. Aspects of SDI interface design, construction, and manufacturing are discussed in relation to return loss. SDI interconnection systems are discussed with regard to selection of cabling, connectors, and other system components.

Published

2016-10

Content type

Original Research

Keywords

Serial Digital Interface, SDI, Network Analyzer, Return Loss, Return Loss Bridge, Standing Wave Ratio, SWR, Time Domain Reflectometer, TDR, Simulation, SPICE, LTspice

DOI

10.5594/M001719

ISBN

978-1-61482-957-7