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ETA—SFO3的电路原理图如图4所示。11个输出/输入端口功能分别是:(1)AGC端口:高效自动增益控制电压输入端口,正常工作时电压2.5V,变化范围0.5~4V,TV为小
ETA-SFO3 circuit diagram shown in Figure 4. 11 output / input port functions are: (1) AGC port: high efficiency automatic gain control voltage input port, normal working voltage 2.5V, the range of 0.5 ~ 4V, TV is small