Used instruments for measuring, testing, and generating electronic and electrical parameters such as voltage, current, resistance, frequency, capacitance, inductance, and signal quality; used volt meters, current meter, multimeters phase meters, temperature meters, data loggers, counters, oscilloscopes, semiconductor curve tracers, signal generators, oscillators, RF signal source sweep generators, RF amplifiers, frequency synthesizers, pulse generators, data generators, arbitrary waveform generators, spectrum analyzers, network analyzers, modulation analyzers, power demand analyzers, power quality analyzers, distortion analyzers, logic analyzers, electronic apparatus for testing and measuring functionality of telecommunications equipment, electronic apparatus for testing and measuring functionality of datacommunications equipment, protocol analyzers, transmission analyzers, metal and optical cable testers, capacitance meters, inductance meters, impedance meters, sound level meters, calibrators, power supplies, plotters, recorders, and accessories, namely, electrical cables, electronic and electrical probes, and adaptors for electrical connectors; and used electric chambers and ovens which allow the control of various environmental conditions such as temperature, humidity, pressure for the purpose of measuring and testing electronic equipment