一、引言显象管的调制特性是指电子束电流和调制极电压之间的关系,有阴极调制和栅极调制两种工作方式。本文提出两种调制方式的相互转化关系,并加以比较。还阐述了特性参数:K、U_(go/K)、U_(go/g)、ΔU_(g/K)、ΔU_(g/g)、F_K、j_(K_(最大))、γ等。并以 NEC 生产的310 GNB 4及我厂生产 I. Introduction The modulation characteristic of the picture tube refers to the relationship between the electron beam current and the modulation pole voltage, there are two kinds of working modes of cathode modulation and gate modulation. This paper proposes the mutual conversion between the two modulation methods and compares them. Also described are the characteristic parameters: K, U go / K, U go / g, ΔU_ g / K, ΔU_ g / g, F_K, j_K_max, γ and the like. And NEC production of 310 GNB 4 and I plant production