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Spectrum analyzers usually allow you to set a resolution bandwidth (RBW) as well as a video bandwidth (VBW). Why is there no video filter in the SRM_3000?

April 26, 2017analyzers bandwidth RBW resolution spectrum usually vbw video

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Spectrum analyzers usually allow you to set a resolution bandwidth (RBW) as well as a video bandwidth (VBW). Why is there no video filter in the SRM_3000?

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Some modern spectrum analyzers traditionally still use so-called video filters. Since selectivity in the SRM is based on fast Fourier transformation (FFT), which simultaneously analyzes different frequencies, there is no need for a video filter. If averaging is still required, the AVERAGE function provided in all SRM-300 operating modes can be used as an alternative. You can additionally set the VBW indirectly using the RBW in Safety Evaluation mode.