The time history module

This paper describes a first prototype of a Fastbus-interfaced logical analyzer module usefully employable in detector and/or Trigger System monitoring. Four of these Time History Modules (THM) have been successfully utilized principally to control the purity of the accepted events. These THMs have a built-in interface to Trigger System (based on Finite State Machine technique), a double input buffer and a 20 MHz sampling clock. The best features of the THM are the glitch capture, the fully programmable sampling time interval, the fast double input buffer, the separate read-out buffer, the data compression capability, the high time resolution, the Fastbus block-reading and the easy and flexible-triggering. Technological improvements are now possible in storage capacity, speed, programmability and power dissipation