SCOPY spectrum measurement start frequency lower and narrower BW for 1/f noise

Hello Satoru, 

Did you check the Spectrum Analyzer configuration examples: Scopy Spectrum Analyzer ?

Hi,

Thank you for your reply.

Although I saw the example you provided, I can not set my desired condition. That is 0.1Hz (or 0.01Hz) to 1kHz with log frequency display.

Can Scopy do this?

Regards,

Satoru

Hi Satoru, 

You can try capturing data at the lowest possible sampling rate and, if needed, apply additional decimation in MATLAB or another tool, before performing the FFT. The sampling rate should be chosen based on the desired FFT resolution bandwidth.

Unfortunately, we don’t have examples for this type of very low-frequency noise measurement, and Scopy currently works down to about 1Hz. Capturing data at such low frequencies will also take a long time before the FFT can be computed.

For reference, please check the Practical Introduction to Frequency-Domain Analysis, especially the section Finding Spectral Components.