Question

Which of the following is the disadvantage of conventional mode of spectrometer or continuous-wave NMR spectrometer?

(a) They are unstable

(b) Maintenance is difficult

(c) High operating cost

(d) Excitation is inefficient

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Question is from Fourier Transform NMR Spectroscopy in division Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation

Answer 1

Right answer is (d) Excitation is inefficient

Easiest explanation: The disadvantage of conventional mode of a spectrometer or continuous-wave NMR spectrometer is that the excitation is inefficient. Only a narrow band of frequencies are contributing to the signal at a time.