NIL HEARDRECEPTION LOG

DCF77 LF time signal

tier A · keyed-tone

76.5 kHz USB · 2026-09-20 22:15:42Z · 06:29 · received at Montmorillon 86500 FRANCE

Spectrogram of DCF77 LF time signal, 76.5 kHz USB, 2026-09-20 22:15:42Z, 06:29: keyed-tone 95% · carrier 5% · tone 1002 Hz · keying 1.00 Hz depth 0.79
spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 6.7 MB ⤓ Opus 1698 kB { }
What was heard
keyed-tone 95% · carrier 5% · tone 1002 Hz · keying 1.00 Hz depth 0.79 — dominant tone 1002 Hz, keyed at 1.0 Hz (depth 0.79). 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 45 dB — thanks to the operator. Receivers
Provenance
sha256 e3b81f7dfef7214c627260b648d5b556539d3cbe28f869cd71f59a210c48598a
source 06:29 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-20T2215Z-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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