Unknown periodic signal on 446.497 MHz (NFM, 1 pulse per second)
Frequency: 446.5 MHz
Received with RTL-SDR (R820T) + SDR Console v3.4, N-FM, about 10 kHz wide, homemade QFH 436 mhz antenna.
Signal strength about -100 dBm
Pulses exactly once per second, about 0.5 s on and 0.5 s off. No speech and no clear tones, only wideband hiss in the audio.
RTL_433 gives no output.
EDIT: signal was received in Denmark
u/Fluffy-North8370 — 9 days ago