Write each interference case as a test vector: interferer frequency or sweep, modulation, occupied bandwidth, continuous or pulsed state, duty cycle, level, exposure time and the connector, antenna field or coupling path where it is applied. Define the wanted GNSS signal, constellation, band, level and tracking state at the same time. A dBm value without these conditions cannot be reproduced.
Choose a pass metric that follows the application. It may be acquisition time, tracked satellites, C/N0 degradation, data validity, timing error, loss-of-lock threshold, AGC state, false output suppression or recovery time. Include out-of-band transmitters that can compress the antenna LNA or receiver even when their energy is outside the GNSS passband.
Test both degradation and return to service. Record preselector, LNA, cable and receiver configuration, temperature, RF-level uncertainty and alarm behavior. Published ITU protection criteria are application- and band-specific analysis inputs; they do not replace an installed receiver coexistence test or justify a universal anti-jam claim.