The control unit receive control commands from the PC and transfer these commands to the switch by the SPI bus with serial dataform and then connect the measured unit to execute assigned control .

控制单元通过PC机接收控制命令，并 将命令以串行数据的形式通过SPI总线 传送给 开关单元，进而对所连接的被测 单元执行指定选通控制。