一个位置控制精度拘禁旋转输入衰减器每通道。
One position detented rotary control precision input attenuator per channel.
通过使用光耦衰减器的串联和分流相结合可以配置成恒定的输入和输出阻抗，而与控制电压无关。
By using a series and shunt combination of optocouplers the attenuator can be configured to produces a constant input and output impedance, regardless of where the voltage control setting is.
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