The Blastware Event Report draws a "Sensor Check" strip on the right of the
waveform panel — the little traces the unit records when it pulses each sensor
before monitoring. Those live in the series-3 binary's trailing block, after
the main waveform record-chain and the per-channel calibration records, as four
length-prefixed records tagged 0x3c-0x3f (Tran/Vert/Long geophone ring-downs +
MicL pulse train). Reverse-engineered against 7 BE12844 oracle events.
New minimateplus/sensor_check.py: decode_sensor_check(raw) locates the record
chain (validated by walking the ids 0x3c->0x3f via their length prefixes) and
decodes each record's delta stream (payload[20:len-8]) with the same 10/20/30/00
delta-block tags as the main waveform codec, from an anchor of 0. Returns
{Tran,Vert,Long,MicL: [samples]} in raw 16-count units, or {} when absent.
Validated: mic pulse-train zero-crossing frequency = 20.1 Hz (exact match to
BW's mic Channel Test freq); geophone ring-downs are consistent ~-990 raw
deflections that damp to a ~-310 settle across all 7 events (a fixed
calibration pulse, so near-identical every run).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDXjZCr4RqT2U3QvMDhgzf
