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怎样判断示波器指标是否正常?_广州美达克公司
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怎样判断示波器指标是否正常?

发布时间:2021-07-22    浏览次数:1474

  怎样判断示波器指标是否正常?下面一起来看看吧!!!

  在示波器中,将信号显示在屏幕的上方,通过屏幕显示的结果可对被测器件进行研究。许多工程师在使用示波器前,可以先测试示波器指标是否正常,特别是二手示波器,更需要判断指标是否正常。

  怎样判断示波器指标是否正常?

  启动后,进入测试界面后,内部程序具有“自检(selftest)”功能,当“自检”完成后,会在屏幕上显示“自检通过”的提示(SELF-TESTPASSED)。

  内在的“自我检查”功能,只能检查一些非常内部的状态,主要是内存等,其它功能还需要人工检查。

  1.示波器自带测试信号,将探头接到示波器测试信号输出端,其输出端通常是1~5V/1KHZ方波信号,

  2.按下自动设定按钮(AUTOSET),也可以手动触发。

  该方法可以检测示波器的主要功能是否正常,如触发、同步等,同时顺便检测探头补偿是否合适,否则需进行微调。

  3.示波器带宽。

  带宽:示波器输入一个正弦信号,当它衰减到70.7%的实际幅度时,即表示示波器的带宽,即-3dB的频率值。

  4.示波器各通道的阻抗是否合格。

  测量阻抗是比较简单的,最方便的方法是既可用手持万用表测量,也可用5位半或6位半数字万用表测量,实际测量值只要在误差范围内即合格。

  需要购买Picoscope示波器,欢迎咨询广州美达克数据科技有限公司