Receiver proof and baseline comparisons
A failed or untested instrument cannot prove an area is clear.
Before interpreting a quiet result, confirm that the receiver hears a known permitted reference signal with the current antenna and setup. The native receiver provides tuning and spectrum observations; do not assume it has every PWA report control.
The PWA’s instrument-proof tool checks reference energy against a median noise floor and records proven, failed or unproven status. A failed or missing proof must remain visible beside survey findings.
PWA expected-emitter and baseline tools compare frequency-bearing observations within tolerance. A capability audit or Bluetooth chooser result has no measured RF frequency and is not an unexpected radio emitter.
A baseline difference may reflect receiver conditions, changed coverage or a real signal change. Record these limits. Historical receiver tests do not certify your current hardware or prove every frequency was observed.