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今年以来,我们在重庆地质仪器厂生产的DMJ—681型回放仪上,加装了一套时变系统。本系统试制成后,和回放仪上原有的延迟线、加权器等配合,并利用其组合程序,初步做了一些时变延迟组合,取得了较好的效果。为便于介绍,先从普通延迟组合谈起。 (一)延迟组合原理及其优缺点 DMJ—681型回放仪,备有延迟线可作延迟组合,现举例说明之。
This year, we have installed a time-varying system on DMJ-681 playback instrument produced by Chongqing Geological Instrument Factory. After the system is made, the original delay line and weighting device on the playback device cooperate with each other, and some combinations of time-varying delay are preliminarily made using the combination program, which achieves good results. For ease of introduction, start with the general delay combination. (A) delay combination principle and its advantages and disadvantages DMJ-681-type playback device, with a delay line can be used for delay combinations, are examples of that.