Testing data is received with data acquisition plug, signal from tested circuitboard is transferred by circuit of switch relay.
前端采集插头接收测试数据，切换继电器电路传递被测电路板信号。
2
The portable blade frequency measurement instrument based on DSP is designed next. The DSP-based circuitboard is made and the software program for testing hardware circuitboard is coded.
论文完成基于DSP芯片的便携式叶片频率测试仪的硬件电路设计和电路板的制作，并完成对电路板的测试。
3
A test and maintenance platform using a general circuitboard tester was designed for testing special BUS using circuit modules.