The article introduces some common fault phenomena of the CA8020 type doubleoscillograph working and the reasons which cause them provides the measurement of the key and the methods of repair.
介绍CA8020型双踪示波器的常见故障现象及其产生的原因，给出了关键点测量数据和故障处理方法。
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The phenomenon of beats can be observed directly on the double-channel oscillograph and the frequency of alternating current can be measured by the vibration curve of the beats.