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一、前言我们按照IEC-IB关于通用接口母线系统的有关规定,组建了一个自动测频系统。本文介绍该系统中所用的打印机的接口电路设计问题。我们用的是一台国产LY4型打印机,在
I. Preface We set up an automatic frequency measurement system according to the relevant provisions of IEC-IB on the universal interface bus system. This article describes the printer interface circuit design used in the system. We use a domestic LY4 printer, at