模型123是用于压电(PE)或集成电子压电(IEPE)传感器的新的微处理器控制的3通道信号调节器。与PE传感器一起使用时,型号123包括电荷放大器。具有20 VDC合规电压的用户可选择的电流源的积分0,4或10 mA,具有IEPE传感器。用户友好的界面允许编程输入灵敏度和输出灵敏度,然后允许仪器计算放大器增益。所有增益选择都存储在非易失性存储器中并在应用电源时重新初始化。如果需要,也可以直接输入增益。型号123利用微处理器睡眠模式来消除高频时钟噪声及其相关的谐波。微处理器暂时唤醒确认前面板开关凹陷,然后在处理和执行所请求的功能后立即睡眠。这允许放大器以最小的自发电噪声运行,并提供清洁,时钟自由放大信号。型号123还使用低噪声线性电压调节器而不是开关稳压器来最小化干扰。 The model 123 uses 12 bit DACs, for each channel, to set amplifier gains from 0.00 to 999.9 with 0.5% precision. Amplifier gains can be changed “on the fly” without damage to the instrument. The model 123 provides 1.5 Hz to 230 kHz broadband frequency response, with optional plug-in, 4-pole Butterworth high pass and low pass filter modules available. Filter selection is provided via rear panel switches. Front panel annunciate LEDs display filter selections. Each channel can drive 10 mA into a 1k ohm load.