本推荐规程提供了一套标准化的理论、技术和程序，用于在指定频道附近的频率范围内测量用于数字电视（DTV）地面传输的8-VSB发射机的光谱特性。规定了基本特征，并给出了测量程序，以确保各方获得可比结果。本文介绍的理论和技术适用于所有8-VSB发射机。然而，这些测量的规格和解释主要集中在美国境内使用的DTV发射机上。

This recommended practice provides a standardized body of theory, techniques, and procedures for measuring the spectral characteristics of 8-VSB transmitters used for terrestrial transmission of digital television (DTV) in the frequency range near their assigned channels. Essential characteristics are specified and measurement procedures are given that ensure that all parties will obtain comparable results. The theory and techniques presented are applicable to all 8-VSB transmitters. However, the specification and interpretation of these measurements is primarily focused on DTV transmitters used within the United States of America.