针对“便携式汽车仪表总成校验箱”系统的开发需要，设计了一种用于汽车电子转速表、里程表校验的频率信号发生器，论述了电路的设计原理和设计思想。
Due to need for the development of portable motor meter assembly checking box, a kind of frequency signal generator is designed, detailed design principle and idea are discussed.
电子转速表校验仪是为汽车、摩托车电子转速表在生产过程中校表工序而专门设计的仪器。
The monitor instrument has been specifically designed for calibrating the electronic rotational velocity meter of automobile and motor during manufacture.
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