NIL HEARDRECEPTION LOG

DCF77 LF time signal

tier A · keyed-tone

76.5 kHz USB · 2026-09-20 05:19:30Z · 10:00 · received at Montmorillon 86500 FRANCE

Spectrogram of DCF77 LF time signal, 76.5 kHz USB, 2026-09-20 05:19:30Z, 10:00: keyed-tone 100% · tone 1002 Hz · keying 1.00 Hz depth 0.85
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.2 MB ⤓ Opus 2652 kB { }
What was heard
keyed-tone 100% · tone 1002 Hz · keying 1.00 Hz depth 0.85 — dominant tone 1002 Hz, keyed at 1.0 Hz (depth 0.85). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Montmorillon 86500 FRANCE (JN05ot) · Antenna Shared Apex SAL 30 array solution · reported SNR 44 dB — thanks to the operator. Receivers
Provenance
sha256 aa7e341184aec4b8ee73c32470951791908ee69cb2c3c35f9288432d5c2e9810
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T0519Z-76.5-dcf77-77.5
Heard in the record
— linked once the record exists.
Licence
CC BY 4.0 — credit NIL HEARD / Reception Log. The recording is ours; the transmission is somebody else's. Descriptions describe sound, never content — why.
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