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一、引言在民用电子产品中,录音机、录像机的产量正在大幅度地增长.这些产品的特点是机械技术和电子技术密切结合,而机械性能的优劣将直接影响视频、声响以至整机质量.这就要求对其进行机械振动信号的测试分析.目前一般用各种抖动仪来测量录音机、录像机机芯的机械振动,这些抖动仪仅给出了抖动强弱在时间域上的反映.设计人员关心的却是抖动噪声分布在哪些频率上,是哪些部件引起的抖动,从而为改进性能提供线索.现有的抖动仪无法做到这一点,为了改进测试机芯的手段.我们在一台TRS-80微型计算机上配接一个A/D转换装置,以将由抖动仪输出的模拟量
I. INTRODUCTION In the field of civil electronic products, the output of voice recorders and video recorders is increasing rapidly.These products are characterized by the close combination of mechanical technology and electronic technology, and the merits of mechanical performance will directly affect the quality of video, sound and whole machine. This requires testing and analysis of mechanical vibration signals.At present, various jitter meters are generally used to measure the mechanical vibrations of tape recorders and video cassette recorders. These jitter meters provide only the reflection of jitter in the time domain. What concerns is what frequencies of jitter noise are distributed and what components cause jitter to provide clues for improved performance. The existing jitter meter fails to do this in order to improve the means of testing the movement. -80 microcomputers with an A / D converter, to be output by the jitter meter analog