Question

In Spin Decoupler, the difference frequency circuit provides a means of mixing two signals and a filter to recover which of the following?

(a) Low-frequency component

(b) High-frequency component

(c) Low-voltage component

(d) High-voltage component

The question was posed to me at a job interview.

My question is based upon Sensivity Enhancement for NMR Spectroscopy topic in section Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation

Answer 1

Right choice is (a) Low-frequency component

Easy explanation: In Spin Decoupler, the difference frequency circuit provides a means of mixing two signals and a filter to recover the low-frequency component. It is included to provide a read-out frequency.