magnitude-frequency characteristic 幅频特性 ; 幅频特征
magnitude characteristic chart 震级特征图
magnitude-phase characteristic 幅相频率特性 ; 或幅相频率特性
It can measure the magnitude characteristic, phase characteristic and limiting frequency of a system.
它能直观的测试一个系统的幅频特性、相频特性和截止频率。
The basic factors affecting collimating characteristic are off-axis magnitude, effective aperture and emission position on the focal plane of off-axis parabolic mirror.
影响离轴抛物镜准直特性的主要因素有离轴量，有效孔径和焦面出射点的位置。
Because it is related to the magnitude of noise RMS voltage, the frequency characteristic of circuit and the power spectrum of noise source, the accuracy of measurement is quite low.
但由于与噪声电压的大小，网络频率特性及噪声源功率谱形式有关，故测量准确度较低。
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