A VNA is useless if you cannot record your findings. Nanovna-Qt excels here by allowing data to be exported in industry-standard formats:
| Problem | Likely Fix | |---------|-------------| | No data / timeout | Wrong port, baud rate, or loose USB cable | | Erratic S11 | Re‑calibrate with proper open/short/load | | S21 shows noise | Increase averaging (Settings → Averaging) | | App crashes on start | Delete ~/.config/nanovna-qt.conf | nanovna-qt software
It is highly optimized for low-latency data transfer, making it suitable for "live" tuning of hardware like filters and duplexers . A VNA is useless if you cannot record your findings