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Which instrument produces frequency domain information?(a) Oscilloscope(b) Spectrum analyzer(c) Frequency divider(d) Beam analyzerI have been asked this question in examination.This interesting question is from Fourier Theory in chapter Fundamentals of Electronics of Avionics

Answer»

Right option is (b) Spectrum analyzer

To explain: The test instrument for producing a frequency-domain display is the spectrum analyzer. Like the OSCILLOSCOPE, the spectrum analyzer uses a cathode-ray tube for display, but the horizontal sweep AXIS is CALIBRATED in hertz and the VERTICAL axis is calibrated in VOLTS or power units or decibels.



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