WWV HamSCI test signal (minute 8)

tier A · keyed-tone

10000 kHz AM · 2026-09-25 20:05:46Z · 03:00 · received at BIRMINGHAM, ALABAMA, USA

Spectrogram of WWV HamSCI test signal (minute 8), 10000 kHz AM, 2026-09-25 20:05:46Z, 03:00: keyed-tone 89% · carrier 11% · tone 501 Hz · keying 0.25 Hz depth 0.96 — spectrogram 0–6.0 kHz · analysis blocks: keyed-tone carrier

loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 3.2 MB ⤓ Opus 695 kB { }

What was heard

keyed-tone 89% · carrier 11% · tone 501 Hz · keying 0.25 Hz depth 0.96 — dominant tone 501 Hz, keyed at 0.25 Hz (depth 0.96). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.

Receiver

KiwiSDR, BIRMINGHAM, ALABAMA, USA (EM63oi) · BEVERAGE 500 feet long Combine with MLA-30+ MAG LOOP Please Check in with Call or Name. · reported SNR 27 dB — thanks to the operator. Receivers

Provenance

sha256 b87920f40b2ae27bfacb6442c810e5760450ebc6748acc1b7813adc072966d35
source 03:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-25T2005Z-10000-wwv-hamsci-10000

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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