Instruments for measuring, testing, and generating electronic and electrical parameters such as voltage, current, resistance, frequency, capacitance, inductance, and signal quality; rf signal testing, oscilloscopes, test and measurement equipment, namely, electrical and power test and measurement equipment; antenna and PIM analyzers, wireless communication test equipment, sonic analyzers, thermal analyzers, bit rate error testing equipment, signal generators, rf and microwave signal generators, oscillators, rf meters, rf signal sources, rf amplifiers, sweep generators, network analyzers, network and fiber installation equipment, CAT 5 fiber equipment, metal and optical cable testers, calibration equipment, power demand analyzers, power quality analyzers, power quality testing equipment, power supplies, volt meters, current meters, power meters, multimeters, frequency synthesizers, temperature measurement and environmental test equipment, phase meters, pulse generators, data generators, arbitrary waveform generators, spectrum analyzers, rf analyzers, microwave analyzers, modulation analyzers, data loggers, data acquisition and control instruments, counters, distortion analyzers, logic analyzers, semiconductor curve tracers, capacitance meters, inductance meters, q-meters, impedance meters, impedance analyzers, calibrators, plotters, recorders, and accessories, namely cables, probes, and adaptors; and data communication testers, protocol analyzers, transmission analyzers, telecommunication transmission testers