The Zm30 is an automated micro-controlled SWR antenna analyzer with a 8 bit micro-controller with a precision low power DDS signal generator. It also includes a self-calibrating reflectometer and displays SWR at selectable frequencies from 1 Mhz to 30 Mhz. It measures: SWR,impedance,reactance, and inductors and capacitors, transmission lines,stubs, and Q and resonant frequency. There is a serial port for field upgradable software. included power and manual