Free, field-grade tools for ERRCS/BDA work.
Built for the people who test emergency responder radio coverage — inspectors, integrators, and AHJs. No signup. Works in the dead zone.
Tools
- −95 dBm Grid Test Board Tap-to-log coverage grid with live 95/99 dials, DAQ and isolation records, and a PDF report. Works fully offline. Open
- ≥ 20 dB Donor Isolation Calculator Check antenna isolation against BDA gain margin before the oscillation finds you. Open
- 30 dBm = 1 W dB · dBm · Watts Converter Instant power and ratio conversions, shareable as a URL. Open
- FSPL Link Budget Calculator EIRP and received level from power, gains, losses, and free-space path loss. Open
- IFC §510 Jurisdiction Code Database Adopted code editions and local ERRCS amendments — verified jurisdiction by jurisdiction. Open
On the bench
- COMING SOON GROL Practice Exams Free FCC General Radiotelephone Operator License prep. No signup.