【摘 要】
：
目前国内测试磁带最大输出电平(MOL)的方法十分繁琐。例如使用丹麦B&K公司的1027音频信号发生器、2010频率分析仪和1617带通滤波器组成的测试系统时,测试的步骤是,调整录音
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目前国内测试磁带最大输出电平(MOL)的方法十分繁琐。例如使用丹麦B&K公司的1027音频信号发生器、2010频率分析仪和1617带通滤波器组成的测试系统时,测试的步骤是,调整录音输入电平,使磁带重放信号的三次谐波失真达到3％,此时输出电平和参考电平之差即为MOL。在实际测试中,往往输入电平的变化会相应改变基波输出电平和三次谐波电平,为
At present, the method of testing the maximum output level of the tape (MOL) in China is very complicated. For example, when using a test system consisting of 1027 audio signal generator from Denmark B & K Company, 2010 frequency analyzer and 1617 bandpass filter, the test step is to adjust the recording input level so that the third harmonic distortion of the tape playback signal reaches 3%, then the difference between output level and reference level is MOL. In the actual test, the change of the input level often changes the fundamental output level and the third harmonic level accordingly
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