Abstract
Multiplexing techniques can provide major increases of several orders of magnitude in sensitivity and/or speed, especially in infrared and nuclear magnetic resonance spectroscopy. This article shows how the most convenient, flexible methods of multiplexing inherently produce a Fourier transform of the spectrum. The experimental arrangements dictate the detailed mathematical treatment of the data, and the architecture and software of minicomputers directly influence the design of 'spectrometer' hardware, entailing consideration of the spectrometer-data processor as an integrated system. It is shown that additional advantages arise, such as convenience of operation and the ability to perform previously impracticable measurements.