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Debug Builds: `lora noise test` changes one thing at a time, Sweeps the band, and reports the floor under each condition; it runs on the device by itself, since one condition pauses Wi-Fi (not saved, so a restart brings it back). Result, at 125 kHz: -117 dBm with the antenna switched off, -106 with the GNSS receiver in standby, -98 with it running. The receiver's serial line isn't it (one sentence a second changes nothing), and neither are the main loop, the CPU frequency, Wi-Fi, the screen or the radio's own regulator, all within 1 dB. Settings > "Pause GNSS for LoRa", off by default: the receiver waits in standby while the radio listens or sweeps, except during a Track, and has a Fix again about 7 s after. The GNSS App says it's paused. 11 dB remain between the antenna with GNSS quiet and the chip alone, untouched by anything that can be switched from the firmware. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT