A Frequency Response Analyzer (FRA) measures the gain and phase response characteristics with respect to frequency of the device or system under test by applying a frequency swept sine wave to it and examining its response signal, featuring wide dynamic range realizes high precise measurement, and also ultra-low frequency measurement. The NF FRA50×7 Series Frequency Response Analyzers comprise a sweep oscillator subsystem with a frequency synthesizer incorporated that generates signals to be fed into the system under test, an analyzer subsystem that measures responses of the system under test for swept frequency signals, operates outcomes of Fourier integrals and calculates amplitudes and phases of the response signals, and a recorder/display subsystem that records and displays the measurement results. Equipped with floating input circuitry and auto ranging functions for constantly optimizing input ranges, FRA50x7 Series allow dynamically changing frequency responses to be quickly measured with high accuracy, without the need to be concerned with input signal levels or the ground potential of the device being tested; moreover, operation is quite simple. The FRA50x7 Series will be your choice in selection. Experience first-hand just how excellent the accuracy, functions and operability they are.