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An improved form of response-curve projection apparatus

机译:一种改进的响应曲线投影装置形式

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The paper describes a combination of beat-frequency oscillator and cathode-ray oscillograph so arranged that the oscillator output is rapidly varied in frequency over a limited range without appreciable change in amplitude, and, after passing through the apparatus whose response curve is to be measured, is applied to the vertical deflector plates of the oscillograph, the horizontal deflection being proportional to the frequency. A frequency scale is obtained on the oscillograph by means of piezo-electric crystals, so that the calibration of the instrument is unaffected by variations in supply voltages, etc. The variation of frequency is obtained by electrical means instead of by the usual rotating condenser, and the absence of mechanically moving parts renders the apparatus compact and portable.
机译:本文描述了节拍频率振荡器和阴极射线示波器的组合,因此布置成振荡器输出在没有明显变化的情况下在幅度上快速变化,并且在通过其响应曲线的装置之后,应用于示波器的垂直偏转板,水平偏转与频率成比例。通过压电晶体在示波器上获得频率,使得仪器的校准不受电源电压的变化的影响。频率的变化通过电气装置而不是通常的旋转冷凝器获得,并且没有机械运动部件使设备紧凑和便携式。

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