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 inefficientThis question was addressed to me during an interview for a job.Question is from Fourier Transform NMR Spectroscopy in division Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation

Which of the following is the disadvantage of conventional mode of spe

1.	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 inefficientThis question was addressed to me during an interview for a job.Question is from Fourier Transform NMR Spectroscopy in division Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation
Answer» 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.

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