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Timing Considerations using FFT-based Measuring Receivers for EMI Compliance Measurements
Author(s): 
Pages: 67-71
Year: Issue:  3
Journal: Safety & EMC

Abstract: 引言 2010年6月,CISPR 16-1-1第3版第1修正案[1]规定,基于FFT的测量接收机(下简称FFT接收机)可用于电磁干扰认证测量,希望将扫描时间降低几个数量级,且不会降低测量准确度.FFT接收机在测量期间,通过在多个频率上并行计算,测量比分辨率带宽大得多的多个频谱段,如图1所示.与此相反,传统EMI接收机用给定的测量时间,在分辨率带宽内测量信号,因此对于整个频率范围需要较长的扫描时间.
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