In Spin Decoupler, the difference frequency circuit provides

in-spin-decoupler-the-difference-frequency-circuit-provides

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

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.