NEW PROGRAMMABLE TIMER DESIGNED FOR PULSED NMR

This article describes a sequencing circuit which generates accurate time intervals for use in pulsed Fourier transform NMR spectrometers. This microprogrammable unit allows control of the spectrometer and definition of the next synchronization event for each time interval. The time intervals range from 1 μsec up to days with basic 12-bit accuracy and a 10-MHz clock. Subsequences of time intervals can be repeated a given number of times. The implementation presented here is directly interfaced to a NOVA 800 computer; interfacing to the CAMAC system or to other computers is straightforward. © 1978 Academic Press, Inc. All rights reserved.