Over on GitHub, programmer blantonl has released p25-survey, a Python tool that scans a frequency range with an RTL-SDR, Airspy or HackRF and identifies any P25 control channels present. For each one found, it logs the WACN, System ID, NAC, RFSS ID and Site ID, the full IDEN_UP band plan, neighbor sites with resolved frequencies, and signal quality metrics including RSSI, BER and decode rate.

The tool also has an optional RadioReference cross-reference mode that annotates results with the RR system name and site description, flags frequency offsets versus the database, and generates a Markdown submission report for data not yet in RadioReference. An auto-gain feature sweeps gain values on each confirmed control channel and recommends the optimal setting for your SDR and location based on BER.