The 6240M Fault Locator provides a quick and convenient method of measuring return loss, VSWR and fault location from a single test port. Fault locators are compact and rugged making them ideal for field measurements. Typical applications include antenna and antenna feeder testing of mobile communications base stations and waveguide feeds on microwave towers. When used with the 6820 series scalar analyzer or 6840 series microwave system analyzers the display can show simultaneously on two channels, return loss and fault location traces. As both measurements are made from a single test port, setup time is reduced and a system can be completely characterized without the need to make repetitive reconnections.