系统采用移频键控（FSK）调制方式，对轴温数字信号进行处理并发射，上传给便携式模拟接车系统。
The system adopts FSK modulation way to carry out directly digital signal of axle tempratureand transmit to the receiving system of test train.
在正确选择编码方式后，波特率设置为大于数字信号传输速率，可保证语音通信质量。
When the right coding mode is chosen, baud rate should be set more than digital signals transmission velocity, and the speech communication quality can be guaranteed.
本文介绍了高速模数转换器ads803的性能、引脚和工作方式，并给出了它与数字信号处理器TMS320 LF 2407的接口设计方案。
In this paper, the features of high speed digital-to-analog converter ADS803, pins and working way are introduced, and the interface design with digital signal processor TMS320LF2407 is given.
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