In modulation driving circuit, with the chip MAX3263, being the function of APC, there is standard PECL level interface to modulate laser modulation current and preset current neatly.

在调制驱动电路中，采用MAX3263芯片，具备标准的PECL电平接口，可以灵活地调整激光器的预置电流和调制电流，并具备自动功率控制功能。

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As a try for circuit standardization, the system realizes the standard protection circuit unit and recovering-time circuit unit, which are connected to system through standard 44 pins' bus interface.

作为标准化的尝试，本系统实现了标准的保护电路单元和恢复时间电路单元，通过44芯总线插座与标准总线接口连接。

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And its hardware circuit and software programming are simple and convenient, so it can economize program code space and CPU running time. It is a sort of standard of serial bus interface used widely.

其硬件电路及软件编程简单、方便，可节省程序代码空间和CPU运行时间，是一种使用广泛的串行总线接口标准。

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