SINAD INDICATOR for 12dB SINAD

To measure radio sensitivity using the SINAD method, we prepared a 1 kHz modulated signal source (SSG) and a SINAD meter. The tinySA provides a simple SSG function, and I attempted to create a simple SINAD indicator. For this, I used the compact ESP32-C3 to sample the demodulated signal and calculate the SINAD value. To keep the design simple, it performs 10 kHz burst sampling with 512 points. The system supports sampling, 1 kHz notch filtering, optional waveform envelope display, and FFT display. The RISC CPU runs smoothly.

If you are interested in this project, please refer to the GitHub link below.

https://github.com/Nobcha/R909-SINAD

https://nobcha23.hatenablog.com/entry/2025/06/10/211826