输入衰减 meaning in English

inputattenuation

Input attenuator range
输入衰减范围
When the level of the mic input is too big , and can ' t be controled by the mic input level adjustmeng potentiometer , push down this button
话筒输入衰减按键:当话筒输入电平太大,话筒输入电平调节电位器已无法控制时,按下此键
The calibration of a spectrum analyser normally includes checks on frequency accuracy , level flatness , level linearity , input attenuation and calibration reference output
频谱分析器的校正工作一般包括检查频率准确度、功率电平不平坦度、标度线性、输入衰减及参考输出值的校正。