GB/T 3241-1998 in English

《GB/T 3241-1998倍频程和分数倍频程滤波器》由TC23（全国电声学标准化技术委员会）归口，主管部门为工业和信息化部（电子）。
本标准规定了组成滤波器组或谱分析仪的模拟的、取样数据和数字方法得到的带通滤波器的性能要求和测试方法。

Scope

This standard specifies the performance requirements and test methods for bandpass filters obtained by analog, sampled data and digital methods that make up filter banks or spectrum analyzers. For all filters of a given bandwidth, the passband range determined by the relative attenuation characteristics of the filters is a constant percentage of the center frequency. Instruments complying with the requirements of this standard may contain any number of bandpass filters covering any desired frequency range. This standard gives the performance requirements of three grades of filters, grade 0, grade 1 and grade 2, and its tolerance increases with the increase of grades. Band-pass filters that meet the performance requirements of this standard can be part of various measurement systems or a complete part of a certain instrument, and can work in real time. Instruments complying with the requirements of this standard are capable of providing band-filtered spectra for a variety of signals, for example, time-varying, intermittent and steady-state signals; broadband and discrete frequencies, and long-duration and short-duration signals Information. Different implementations of filters meeting the requirements of this standard may give different results in applications involving transient signals.