The RT-ZF20 with Calibration Adapter from Rohde & Schwarz is a class leading multifunctional Cable and Antenna Analyzer. It is designed for installation and servicing of cellular network base stations and other complex communication systems. The analyzer is suitable for multiport applications with up to 8 ports managed simultaneously. It provides measurements of Return Loss, VSWR, Distance to Fault, Transfer and Isolation. It offers many applications, including cable testing, connector measurements, coax tests, and frequency-selective measurements, as well as connector and cable assembly testing. The calibration adapter is designed to ensure the accuracy of the measurements. It includes an internal DC voltage source, reference resistors and narrow band filters. It also features a unique alignment setup feature, allowing the user to quickly set, and verify the alignment of the calibration process.