A spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument. The primary use is to measure the power of the spectrum of known and unknown signals. The input signal a spectrum analyzer measures is electrical, however, spectral compositions of other signals, such as acoustic pressure waves and optical light waves, can be considered through the use of an appropriate transducer.
By analyzing the spectra of electrical signals, dominant frequency, power, distortion, harmonics, bandwidth, and other spectral components of a signal can be observed that are not easily detectable in time domain waveforms. These parameters are useful in the characterization of electronic devices, such as wireless transmitters.
The display of a spectrum analyzer has frequency on the horizontal axis and the amplitude displayed on the vertical axis. To the casual observer, a spectrum analyzer looks like an oscilloscope and, in fact, some lab instruments can function either as an oscilloscope or a spectrum analyzer.
In 1959, NF Corporation was founded with the noble mission of providing the world with unique products using its high-precision negative feedback control technology, a technique not quite widespread in Japan at that time. This pioneering spirit is still alive today at NF, which has been proactively pursuing new fields and developing new products with the aim of contributing to the next-generation R&D and, through that, to advancing society. The proprietary technology of NF is used in a wide array of applications––from automobiles, digital appliances, and other high-tech electronic devices to fuel cells, solar power, and other clean energy technologies, as well as nanotechnology and even satellite, rocket, and other aerospace technologies.
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