WWV HamSCI test signal (minute 8)

tier A · keyed-tone

10000 kHz AM · 2026-09-24 11:05:16Z · 03:00 · received at Tellico Plains, TN USA

Spectrogram of WWV HamSCI test signal (minute 8), 10000 kHz AM, 2026-09-24 11:05:16Z, 03:00: keyed-tone 33% · carrier 22% · noise 22% · data 11% · morse 11% · tone 501 Hz · keying 0.32 Hz depth 0.88 — spectrogram 0–6.0 kHz · analysis blocks: keyed-tone morse data carrier noise

loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 3.2 MB ⤓ Opus 698 kB { }

What was heard

keyed-tone 33% · carrier 22% · noise 22% · data 11% · morse 11% · tone 501 Hz · keying 0.32 Hz depth 0.88 — dominant tone 501 Hz, keyed at 0.32 Hz (depth 0.88). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.

Receiver

KiwiSDR, Tellico Plains, TN USA (EM75ul) · end-fed 173' wire @ 50' · reported SNR 28 dB — thanks to the operator. Receivers

Provenance

sha256 8c9b925722b8d7a027c68a6e4053cf7c9ccb3c4dcaa7fae5eb932ed59f653e93
source 03:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-24T1105Z-10000-wwv-hamsci-10000

Heard in the record

Reception Conditions Were Poor — “Silent Key”

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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