Question

Suppression of frequencies which contain no signal does which of the following?

(a) Increases S/N ratio

(b) Decreases S/N ratio

(c) S/N ratio is kept constant

(d) S/N ratio becomes 1

This question was posed to me in a national level competition.

I would like to ask this question from Sensivity Enhancement for NMR Spectroscopy in chapter Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation

Answer 1

The correct answer is (a) Increases S/N ratio

To explain: Suppression of frequencies which contain no signal increases S/N ratio. The noise decreases.