BW writes ">100 Hz" for ZC Freq when the zero-crossing algorithm sees a
peak too fast to count — the device's reporting ceiling is 100 Hz on
V10.72. Our parser fell back to None via _parse_number (which requires
a leading digit), so the PDF rendered "—" where BW shows ">100".
Mirrors the OORANGE/saturated pattern already used for PPV and PSPL:
parser stores the threshold (100.0) on zc_freq_hz + sets a new
zc_freq_above_range flag. Projection carries the flag through to the
sidecar; PDF renderer prepends ">" when set.
Affects both per-channel stats tables (waveform + histogram variants)
and the mic block's ZC Freq row.
Verified on the real T190LD5Q.LK0W fixture: Tran zc_freq_hz=100.0
above_range=True; Vert/Long (normal values) above_range=False; "N/A"
still produces zc_freq_hz=None which renders as "—" (unchanged).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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