A 64 channel VME transient recorder module

This paper describes an inexpensive and innovative VME transient recorder module, with 64 multiplexed analog input channels, 12-bit resolution, sampling rate up to 666 kSPS and 2 Words of local memory providing standalone operation capability. This module was developed for the operation control of the tokamak ISTTOK. Its architecture takes advantage of the large scale integration and improved dynamic performance of recently developed devices. The main operational features are described and methods for assessing the performance are discussed. The experimental results already obtained as well as the philosophy of operation and programmability of this module suggest its adequacy to the monitoring of a large and complex nuclear physics experiment.