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数据传输技术是衡量有线遥测地震数据采集系统的一项重要指标。SN388以其独有的 8.96MB/s数传速率而领先于其它同类产品。但SN388数据传输技术一直被SERCEL公司视为其核心机密 ,现有的SN388数传技术文件以介绍早期SN368理论为基础 ,显得十分简单粗糙。文章从介绍SN388数据传输线入手 ,重点讨论了排列供电、数传同步初始化和数据时钟恢复传输等各项传输技术 ,并指出SN388数据传输采用了便于收端同步的“双极性归零码”和排列加电后“连续的指令发射和回收”工作方式 ,才使得SN388具有 2ms 1 2 0 0道的数传能力和迅速的查看建排和采集功能。这一研究结果除了弥补SN388有关数据传输资料严重不足之外 ,也将有益于有关人员对有线数据传输技术的更深入地研究开发和应用
Data transmission technology is an important indicator to measure the cable telemetry seismic data acquisition system. SN388 with its unique 8.96MB / s data rate and ahead of other similar products. But SN388 data transmission technology has been regarded as its core secret SERCEL company, the existing SN388 data transmission technology to introduce the early SN368 theory based, it is very simple and rough. The article starts with introducing the SN388 data transmission line, and focuses on various transmission technologies such as arrangement of power supply, synchronization of data transmission and data clock recovery transmission. It also points out that the SN388 uses “bipolar zero return code” and Arranged after power-up “continuous command launch and recovery” mode of operation, which makes the SN388 with 2ms 1 2 0 0 number of digital transmission capabilities and rapid view of the construction and acquisition capabilities. In addition to making up for the serious shortage of SN388 data transmission data, this research result will also benefit the researchers in further research, development and application of wired data transmission technologies