电声学.分倍频程和频程频带滤波器.第1部分:规格

[中文适用范围]： 本部分标准规定了模拟、采样数据和数字实现的带通滤波器的性能要求。对于给定带宽的所有滤波器，其相对衰减特性的通带区域范围是精确中频的恒定百分比。符合本标准要求的仪器可以包含任意数量的连续带通滤波器，覆盖任何所需的频率范围。 性能要求分为两类：1 类和 2 类。通常，1 类和 2 类滤波器的规范具有相同的设计目标，主要区别在于接受限和运行温度范围。2 类的接受限大于或等于 1 类。还规定了最大允许测量扩展不确定度。 性能要求适用于八度频率比和中频为 10 的幂次的设计。 符合本标准性能要求的带通滤波器可以是各种测量系统的一部分，也可以是频谱分析仪等特定仪器的组成部分。 本标准规定了滤波器运行的环境条件范围。所需范围取决于包含滤波器的仪器是设计用于在受控环境中运行，还是更广泛地在现场运行。 符合本标准要求的带通滤波器能够为各种信号提供频带滤波后的频谱信息，例如时变信号、间歇信号或稳态信号；宽带信号或离散频率信号；以及长或短持续时间的信号。 [外文原描述]： IEC 61260-1:2014 specifies performance requirements for analogue, sampled-data, and digital implementations of band-pass filters. The extent of the pass-band region of a filter's relative attenuation characteristic is a constant percentage of the exact mid-band frequency for all filters of a given bandwidth. An instrument conforming to the requirements of this standard may contain any number of contiguous band-pass filters covering any desired frequency range. Performance requirements are provided for two filter classes: class 1 and class 2. In general, specifications for class 1 and class 2 filters have the same design goals and differ mainly in the acceptance limits and the range of operational temperature. Acceptance limits for class 2 are greater than, or equal to, those for class 1. Maximum-permitted expanded uncertainties of measurement are also specified. Band-pass filters conforming to the performance requirements of this standard may be part of various measurement systems or may be an integral component of a specific instrument such as a spectrum analyser. This standard specifies the ranges of environmental conditions for operation of the filters. The required range depends on whether the instrument containing the filters is designed to be operated in a controlled environment or more generally in the field. Band-pass filters conforming to the requirements of this standard are capable of providing frequency-band-filtered spectral information for a wide variety of signals, for example, time-varying, intermittent or steady; broadband or discrete frequency; and long or short durations. This first edition of IEC 61260-1, future IEC 61260-2 and future IEC 61260-3, cancel and replace the first edition of IEC 61260 (1995) and its amendment 1 (2001). This edition constitutes a technical revision which includes the following significant technical changes with respect to the IEC 61260 (1995) and its amendment 1 (2001): - the single document in the first edition of IEC 61260 (1995) and its amendment 1 (2001) is in IEC 61260 series separated into the three parts covering: specifications, pattern evaluation tests and periodic tests; - the performance category class 0 is removed; - the design goals for the specification can be based only base-10; - the reference environmental conditions have been changed from 20 °C / 65 % RH to 23 °C / 50 % RH; and - IEC 61260 (1995) specified tolerance limits without considering the uncertainty of measurement for verification of the specifications. IEC 61260 series specifies acceptance limits for the observed values and maximum-permitted uncertainty of measurements for laboratories testing conformance to specifications in the standard.