An integrated control system for a pulsed ion cyclotron resonance (ICR) mass spectrometer has been designed, constructed, and put into operation. It utilizes a crystal clock oscillator to accurately control the delay and width of the various pulses necessary for pulsed ICR operation. A switched integrator, sample/hold postdetection system is also described which improves aquisition, display, and signal-to-noise characteristics of the detected ion signal obtained from a gated marginal oscillator detector.