误差向量幅度（ＥＶＭ）测量正在成为数字凋制系统分析的一个关键部分。这种测量方式早已被写进一些重要的系统标准，例如全球移动通信系统（ＧＳＭ）、北美数字蜂窝系统（＼ＡＤＣ）和个人手持电话系统（ＰＨＳ），而且，它也准备纳入即将发表的几部标准，如数字视频传输标准 Error vector magnitude (EVM) measurement is becoming a key part of digital dimming system analysis. This measurement has long since been written into some of the major system standards such as Global System for Mobile Communications (GSM), North American Digital Cellular System (ADC) and Personal Handyphone System (PHS), and it is also preparing for inclusion in the forthcoming few Ministry standards, such as digital video transmission standards