DIN EN 61260-1:2011-11

This part of IEC 61260 provides performance requirements for analogue, sampled-data, and digital implementations of bandpass filters. An instrument conforming to the requirements of this standard may contain any number of contiguous bandpass filters covering any desired frequency range. Performance requirements are provided for two filter classes: class 1 and class 2. Tolerance limits on deviations from design goals increase as the class number increases. Maximum-permitted expanded uncertainties of measurement are also specified. Performance requirements are given for designs where the octave frequency ratio and the midband frequencies are powers of ten. Bandpass 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. The standard provides requirements for EMC, i.e. specifications regarding the immunity of the filter and regarding the upper limits on radio-frequency emissions.