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How can the need for an array of narrow-band filters and detectors be eliminated?(a) By using multi-channel excitation(b) By using a detector for each frequency(c) By reducing the number of detectors(d) By using Fourier transformThe question was asked at a job interview.The origin of the question is Fourier Transform NMR Spectroscopy in section Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation

Answer»

Right CHOICE is (d) By using Fourier transform

Explanation: Fourier transform plays the role of a multichannel RECEIVER. Hence, the NEED for array of narrow-band filters can be eliminated



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