Tail pulse generators simulate the outputs of radiation detectors, photomultiplier tubes (PMT's) and their electronics.
They in turn test systems and components for linearity, stability, resolution, pile-up and count rate effects.
The random tail-pulse generators can test for pile-up and count rate effects.
The fast tail-pulse generators can simulate the 5 ns FWHM pulses of faster PMT outputs.
The precision tail-pulse generators can test linearity, stability and resolution.