High-speed I/O (HSIO) is presenting significant measurement challenges, as detailed in EE-Evaluation Engineering's January special report on serial-bus test. That report describes the relevant offerings of companies including Agilent Technologies, Anritsu, Rohde & Schwarz, Tektronix, and Teledyne LeCroy. Relevant products include bit error rate testers and oscilloscopes. Providing detailed insight to the latter is our January special report on oscilloscopes and the companion online exclusive on the topic. An additional online exclusive article offers elaboration on HSIO test and provides links to additional resources to facilitate additional research. Read it here.