说明硬件测试中伪随机码序列特点和生成原理，并对比较时如何使数据对应做出讨论。
The comparing program in VB, how to produce a pseudorandom bit stream, and how to make the compared synchronous data correspondingly is described.
本文通过对NRZ、RZ伪随机码序列进行频谱分析，得知当NRZ码变换成码元占空比为1/2的RZ码时，所提取出的定时时钟功率最强。
By analysing frequency spectrum in this paper, we can understand that when NRZ code be transferred into RZ code of 1/2 mark-to-space ratio, the timing clock can be obtained at largest power.
伪随机码绝对式编码器采用M序列伪随机码作为编码方法，采用双狭缝技术进行分时位置读取，并采用ROM元件进行译码输出。
M sequence pseudorandom code is used for encoding the pseudorandom code absolute encoder, double slit technique is used to perform time sharing reading and ROM is used as the coding device.
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