NIL HEARDRECEPTION LOG

DCF77 LF time signal

tier A · keyed-tone

76.5 kHz USB · 2026-09-20 03:02:18Z · 10:00 · received at TREMOLAT (24), FRANCE

Spectrogram of DCF77 LF time signal, 76.5 kHz USB, 2026-09-20 03:02:18Z, 10:00: keyed-tone 97% · carrier 3% · tone 999 Hz · keying 1.00 Hz depth 0.83
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 10.2 MB ⤓ Opus 2675 kB { }
What was heard
keyed-tone 97% · carrier 3% · tone 999 Hz · keying 1.00 Hz depth 0.83 — dominant tone 999 Hz, keyed at 1.0 Hz (depth 0.83). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, TREMOLAT (24), FRANCE (JN04ku) · Vertical pylon isolated 11 meters (ou Mini-Whip dual FET) · reported SNR 40 dB — thanks to the operator. Receivers
Provenance
sha256 8ed407eb92b85c8d60667e09fbc8087b6c47409e89a48dcb15c2c94ccca8137c
source 10:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T0302Z-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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