Marking the arrival time of detected events with precision and consistency is the primary function of a timing discriminator. Achieving the optimum time resolution is important whether the application is time spectroscopy, or simply determining that events from two different detectors occurred simultaneously. The technique for deriving optimum time resolution depends on the type of detector. Therefore, one must choose the right timing discriminator based on the detector characteristics and the intended application. The descriptions and selection charts that follow will guide you to the best choice.