9 Instruments for measuring, testing, and generating electronic and electrical parameters such as voltage, current, resistance, frequency, capacitance, inductance, and signal quality; volt meters, current meters, power meters, multimeters, phase meters, temperature meters, data loggers, data acquisition and control instruments, counters, oscilloscopes, semiconductor curve tracers, signal generators, oscillators, rf meters, rf signal sources, 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, data communication testers, telecommunication testers, protocol analyzers, transmission analyzers, metal and optical cable testers, capacitance meters, inductance meters, q-meters, impedance meters, calibrators, power supplies, plotters, recorders, and accessories, namely cables, probes, and adaptors