A CAMAC High Resolution Time Interval Meter

A four-channel Time Interval Meter (TIM) with one-eighth nanosecond resolution was designed and packaged into a triple width CAMAC module. The TIM has a common Start and four Stop Inputs with a total range of 65 536 nanoseconds (plus an overflow bit). The basic accuracy is dependent on an internal 125 MHz clock. Preliminary measurements indicate a standard deviation of 185 pseconds.