The STB100 is a bench top beacon test unit which is perfect for maintenance facilities, test facilities, beacon manufacturers, and beacon developers. The STB100 tests 406 MHz, 121.5 MHz, 243 MHz, and performs 406 MHz frequency stability. It has accurate DC current and voltage sensing that allows for the characterization of the DC power supplied to a beacon and measures leakage current down to 200 nA. Connect up to two temperature probes to add temperature data to each measurement. The I/O interface has 2 relays, 8 analog I/O lines, and 8 ADC input lines for use with user-defined functions. An internal GPS receiver allows for delta distance measurement for location encoded beacons. The STB100 connects to a PC while an optional API set allows advanced users to create their own customized user interface to control the unit.