Last week, we discussed FFT functionality and VSA (vector-signal-analysis) software on a scope. Sometimes I hear this called spectrum analyzer software, but in fact, spectrum analyzer software turns ...

The Zoom FFT is interesting because it blends complex down conversion, lowpass filtering, and sample rate change through decimation in a spectrum analysis application. The Zoom FFT method of spectrum ...

Spectral analysis with a scope FFT is limited compared to a spectrum analyzer. Manual cursors typically are required to identify the frequency and amplitude of peaks in the spectrum.

This allows users to increase the record length of the FFT, which improves the frequency-spectrum estimate. Longer record lengths also provide finer frequency resolution and better dynamic range.

Several EMC testing solutions will be on display at the IEEE EMC Europe 2025 symposium held from 1-5 September 2025.

However, their spectrum analysis abilities are lacking. While these scopes do have a Fast Fourier Transform (FFT) function, it’s limited and nearly useless for RF.

One day when trying to coax some information out of the FFT setting, [dexter] threw his hands up in frustration and decided to write a file viewer with FFT spectrum analysis.