Tt & C Ground Station Terminal Data Access Device

With the development of electronical technology, the space tracking multi-functional has successfully developed, telemetering and command base-band equipment. The speed of the base-band is also increasing.The total speed is up to hundred million.The base-band equipment for this system demodulate two kinds of data, one is telemetering data,another is low-speed transmissing data, the total rate is between 1K-30Mbps.The system requires a device to save the data,net send the date, later data dealing,and error bit test.The subject of this application is in this context, by designing a Data Access Device, we can receive, store and test the error rate of the telemetering and transmissing data which is demodulated by the base-band equipment.At the same time, the Data Access Device can transmit the data to the data center through network for follow-up data playback and analysis, which meets the requirements of the system design.The Data Access Device mainly contains a integrated displays,a industrial computer,a CPCI card and its software and driver.The CPCI card uses one FPGA and two SDRAMs to accomplish the data continuously storage,and uses another FPGA to implement the interface between the PCI9656 and the computer CPCI bus.The CPCI bus which can run 64bit and 66MHz is implemented by the PCI9656 chip.The CPCI card uses Windows2000 operating system.The device driver has been developed in DriverStudio's development environment and the application development is using Microsoft VC6.0.At the sametime we introduced the software usage of the Quratus II and FPGA-development process.