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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 frequencypowerdistortionharmonicsbandwidth, 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.

~Wikipedia

ThinkRF provides a complete and comprehensive line of high-performance RF radio front ends, tuner/down-converters and receiver/digitizer/analyzers. ThinkRF’s solutions have the RF performance of high-end lab spectrum analyzers but are designed to meet the challenges of distributed and remote wireless signals intelligence applications.