NIL HEARDRECEPTION LOG

XPB1 polytone ladder, 05:00 step

tier B · mixed

18451 kHz USB · 2026-09-21 04:57:39Z · 05:00 · received at Assen | Netherlands

Spectrogram of XPB1 polytone ladder, 05:00 step, 18451 kHz USB, 2026-09-21 04:57:39Z, 05:00: mixed 87% · voice 13% · keying 0.65 Hz depth 0.71
spectrogram 0–6.0 kHz · analysis blocks: voice mixed
loop [ ] · speed in the player bar · deep link #t=seconds ⤓ FLAC 5.0 MB ⤓ Opus 1389 kB { }
What was heard
mixed 87% · voice 13% · keying 0.65 Hz depth 0.71, keyed at 0.65 Hz (depth 0.71). Machine description of the sound by the rig's classifier; it sorts, it does not certify a station.
Receiver
KiwiSDR, Assen | Netherlands (JO32fx) · Active Loop antenna PAHGOR (serial nr: 001) built by ► PA0EBC ◀ 👍 · reported SNR 39 dB — thanks to the operator. Receivers
Provenance
sha256 02b7125f29d3cd5ef6e88d4230c5acdac665948b82753f4ceb3115a2e99293b3
source 05:00 WAV, 11999 Hz mono
kiwirecorder.py (jks-prv/kiwiclient v1.11) · rig item 2026-09-21T0457Z-18451-xpb1-0500
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.
Related