The AA-55 Zoom analyzer is designed for measuring SWR (standing wave ratio), return loss, cable loss, as well as other parameters of cable and antenna systems in the range of 60 kHz to 55 MHz. A built-in ZOOM capability makes graphical measurements especially effective. The following tasks are easily accomplished by using this analyzer: Rapid check-out of an antenna Tuning an antenna to resonance Comparing characteristics of an antenna before and after specific event (rain, hurricane, etc. ) Making coaxial stubs or measuring their parameters Cable testing and fault location, measuring cable loss and characteristic impedance Measuring capacitance or inductance of reactive loads