DCF77 LF time signal
loop [ ] · speed in the player bar · deep link #t=seconds
⤓ FLAC 4.0 MB
⤓ Opus 1085 kB
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- What was heard
- keyed-tone 92% · carrier 8% · tone 999 Hz · keying 1.00 Hz depth 0.87 — dominant tone 999 Hz, keyed at 1.0 Hz (depth 0.87). 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 43 dB — thanks to the operator. Receivers
- Provenance
- sha256 778aff857bac4c600d473318c27a9a246e6e1008656ba8d75187751a3e4e1278
source 04:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-18T2130Z-76.5-dcf77-77.5 - Heard in the record
- — linked once the record exists.
- Notes
-
rig: DCF77 77.5 kHz, 50 kW, continuous. Carrier amplitude drops ~16 dB for 0.1 s (bit 0) or 0.2 s (bit 1) at each second except s59. Dial 76.5 USB -> carrier as 1000 Hz tone with 1 Hz dips. Requires LF-capable Kiwi antenna. https://en.wikipedia.org/wiki/DCF77
- 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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