The Anritsu-Wiltron S331 is a portable Cable/Antenna Analyzer operating from 25 to 3300 MHz. The S331 measures Return Loss or VSWR and can be used to determine distance to a fault using the supplied software. The S331 can export stored trace data to a personal computer for print out, historical archiving, or comparison use through its RS232 serial interface. The S331 is lightweight, battery operated and features a large LCD display for viewing data. The S331 can be rapidly re-calibrated in the field using optional artifact standard open/short/precision terminations.