以霍尼韦尔公司HMR3000电子罗盘为例，简述了电子罗盘的性能特点、测向原理和干扰分析，通过一个工程应用实例，对电子罗盘在车载和转台复合应用下出现测向误差增大的问题进行了分析，并分别从应用方面、软件方面和设计方面提出了几种解决方法，经过试验验证，证明这些解决方法是有效的.

Taking the Honywell’s HMR3000 electronic compass for example，the characteristics of the electronic compass, the principle of direction finding, and jamming analysis are introduced. The problem of increasing direction finding errors for the electronic compass used on vehicular turret is analyzed with an engineering application instance. And several solutions are proposed from the following aspects such as application, software and design. Test validated these solutions′ effectiveness.