PC based time of flight measuring system

We implemented a PC/XT based system for measuring the particles arrival times. We build up an inexpensive and versatile system adapting two general purpose counters. A switchable combination between programs in Pascal and in machine code determines a great program flexibility and a good efficiency of the signal. Schottky integrated circuits assure a high processing speed. Channel width ranges from 0.1 μs to 10 ms, the scanning capacity exceeds 65 million cycles, the number of pulses on each channel may be up to 65535 and the maximum numbers of channels may run up to 32400