Development of a VXIbus B-size special module used for measurement of time and distance

In this paper, a special module using VXIbus which is the latest test and measurement bus is present. The module is a message-based servant device and can measure the time between two pulses. With detail analysis, the design method of the primary interface of the module, the operating principle and the error estimation of measurement circuit are described appropriately. The module has been successfully applied to a VXIbus-based radar automatic test system for measuring time and the corresponding distance.<>