NF CORPORATION

Electronic instruments in the nature of signal generators, function generators, arbitrary waveform generators, oscillators, clock generators for digital circuits, logic signal generators, oscilloscopes, probes for oscilloscope, LCR meters, capacitance meters, impedance meters, resistance measuring instruments, test fixtures, test leads, digital multimeters, voltmeters, DC voltmeters, AC voltmeters, noise meters, ammeters, DC ammeters, AC ammeters, frequency response analyzers, lock-in amplifiers, preamplifiers, differential amplifiers, amplifier for signal conditioner, filters for electric signal, variable cut-off frequency filters for electrical signal, programmable filters for electrical signal, signal conditioners, signal processing/analyzing measurement apparatus, data recorders, acoustic emission measuring apparatus, acoustic emission sensors, preamplifiers for acoustic emission, discriminator for acoustic emission, electrical power supplies, AC power supplies, DC power supplies, power amplifiers, bipolar power supplies, electric power converters, AC/DC power converters, DC/AC power converters, protection relay testing systems comprised of voltage protection relay testers, current protection relay testers, protection relay testing controllers and automatic protection relay testing software, filter modules for electric signal, low-pass filter modules for electrical signal, high-pass filter modules for electrical signal, band-pass filter modules for electrical signal, variable cut-off filter modules for electrical signal, resister tunable filter modules for electrical signal, voltage tunable filter modules for electrical signal, programmable filter modules for electrical signal, amplifier modules, I-V converter modules, oscillator modules, resister tunable oscillator modules, phase detector modules, phase sifter modules, filter units for signal conditioner