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节目磁带头部与尾部的自动寻找,是微型计算机应用到广播电台中必须解决的一个关键问题。本文首先简要介绍节目磁带头部与尾部自动寻找的三种方法,然后着重讨论其中一种便于直接推广的电平检测法的设计,并且提出两种可行的设计方案。这种电平检测法已在作者参与研制的广播电台微机自动控制系统中采用。
The automatic searching of the head and the tail of the program tapes is a key issue that must be solved when microcomputers are used in radio stations. In this paper, we first briefly introduce three methods of automatically searching for the head and the tail of the program tapes. Then we focus on the design of one of the level detection methods that is easy to be generalized and propose two feasible design schemes. This level detection method has been involved in the author’s research radio station microcomputer automatic control system used.