NIL HEARDRECEPTION LOG

XPB1 polytone ladder, 05:20 step

tier B · data

17451 kHz USB · 2026-10-03 05:19:10Z · 05:00 · received at Brettnach F57320

Spectrogram of XPB1 polytone ladder, 05:20 step, 17451 kHz USB, 2026-10-03 05:19:10Z, 05:00: data 60% · mixed 27% · carrier 7% · morse 7% · tone 1163 Hz · keying 0.50 Hz depth 0.92
spectrogram 0–6.0 kHz · analysis blocks: morse data carrier mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 5.2 MB ⤓ Opus 1267 kB { }
What was heard
data 60% · mixed 27% · carrier 7% · morse 7% · tone 1163 Hz · keying 0.50 Hz depth 0.92 — dominant tone 1163 Hz, keyed at 0.5 Hz (depth 0.92). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Brettnach F57320 (JN39GG) · vertical · reported SNR 41 dB — thanks to the operator. Receivers
Provenance
sha256 8cab721fd0a0dff138e1588d2a4dac2e438d3fb4c73ffaf0b10492bae83bd999
source 05:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-10-03T0519Z-17451-xpb1-0520
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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