LXI Bus ATE Test Signal Monitoring Equipment Development

Currently, the ATE(automatic test equipment) in the armed forces often tests alarge number of missile. It is likely to cause rapid wear of the connector andunreliable of the contact point. Frequent transportation is also easy to cause ATEinternal connector loose. When the test result is failure, we cannot judge whetherfailure of ATE or failure of the device under test. It requires the third-partyarbitration. Therefore, we develops an on-line monitoring equipment for missileATE test signal based on LXI, monitoring, recording and analysis a variety ofsignals in ATE testing process, while arbitration ATE and the device under test.In this paper, we analyze the functional requirements of the monitoringequipment and the features of the missile ATE test signal, develop ATE test signalmonitoring equipment based on LXI, realize the high-speed acquisition fordifferent types of signals, real-time network uploading for large quantities of data,graphical display analysis, database storage, and fault diagnosis.In hardware aspect, based on a modular design concept, we plan the basicarchitecture for the combination of control module and data monitoring functionmodule. Using the high-speed data processing capabilities of DSP and the large-capacity cache and a wealth of logic unit of FPGA, a control module with LXIinterface which can complete logic control, data storage and data distributionfunction is designed. With analysis the characteristics of the specific test signal ofATE, a data monitoring function module to support parallel monitoring ofcommunications test signal, the DC voltage signal and the AC high voltage signalis designed.In software aspect, we complete the hardware curing program design and PCsoftware design. Hardware curing program implements data acquisition control,multi-channel data management and a large amount of data uploading. It alsoimplements the base class function of LXI device and LAN discovery andidentification. PC application software mainly implements the data processing,analysis, display and fault diagnosis of serial communication and analogmonitoring, implements optional message monitoring, network receives, messagesreal-time display, database storage and query conditions of1Mb/s1553B.This equipment has been completed batch production and has been successfully delivered the force. Delivery and acceptance testing and actual use ofthe results shows that, the technical indicators of the missile ATE test signal on-linemonitoring equipment meet the design requirements, the system is running stableand reliable, this equipment has completed the ATE test signal on-line monitoringtask well.