The LVDAM-COM software is a set of computer-based instruments for telecommunications. It includes an Oscilloscope, a Frequency Counter, a True RMS Voltmeter, and a Spectrum Analyzer. The LVDAM-COM software is used with the Virtual Test Equipment Interface, Model 9407, to perform time-domain and frequency-domain measurements in the Analog Communications Training System, Model 8080, and the Digital Communication Training System, Model 8085.