Root cause of the DSCA39 footer mismatch: the "Standard output load for test is
250 ohms." line is a footer note, not a parameter, but the STAGE 1 extractor
captured it as a (column-truncated) row "Standard output load for te". And the
renderer's OUTSIGTYPE==='CURRENT' emission was wrong on both ends — it printed the
note (after the underline, invisible to the validator gate) for many -C current
models whose staged originals never had it, and never placed it correctly for the
models that do.
Fix is data-driven, matching the rest of the template approach:
- derive-dsca-templates.js: detect the "Standard output load..." line, capture it
as a per-model `loadNote` property, and exclude it from rows. Regenerated
dsca-templates.json — surgically clean: only the 5 DSCA39 models changed (lost
the truncated row, gained loadNote); all 121 others byte-identical.
- datasheet-exact.js: emit `dscaTpl.loadNote` (blank line + note) before the footer
underline, only for models that have it; removed the OUTSIGTYPE-based emission.
STAGE 3 re-validation: FINAL-TEST CLEAN 85 -> 88, mismatches 9 -> 6, matches
2206 -> 2278. DSCA39-01/02/07 now fully clean; DSCA39-01 byte-content-verified.
No regression — the -C current models stayed clean and no longer carry the
spurious after-underline note.
The 6 remaining dirty models (DSCA38-05/-1793/-19C/-19E, DSCA39-05, DSCA39-1950)
are ALL retest data-vintage: the staged .TXT is an older test run than the DB
latest-wins record (Supply Current / Linearity differ by more than rounding).
Not render bugs — cannot be reconciled against an older sheet.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
formatMeasuredExact now applies Math.fround to the parsed value before toFixed.
The DOS QuickBASIC computed/stored these as single-precision floats, so the
last-digit rounding at the .5 boundary follows single, not double, precision.
Without it, double-precision toFixed flipped boundaries (9.9995 -> "9.999" vs
golden "10.000"; 46.85 -> "46.9" vs "46.8"; .45 -> "0.5" vs "0.4"; 3.3325 ->
"3.333" vs "3.332"). Verified each against the staged golden.
STAGE 3 re-validation: FINAL-TEST CLEAN models 68 -> 85 (+17), mismatches
26 -> 9, cert matches 2123 -> 2206. Zero regression — every remaining dirty
model was already dirty pre-fix; no previously-clean model flipped.
The 9 remaining are NOT rounding:
- 4 models (DSCA38-05/-1793/-19C/-19E): Supply Current retest data-vintage — the
staged .TXT is an older test run than the DB latest-wins record; not a render
bug, can't reconcile against an older sheet.
- 5 models (DSCA39-01/02/05/07/1950): STAGE 1 template artifact — the footer note
"Standard output load for test is 250 ohms." was mis-captured as a truncated
parameter row. A renderer-side fix was attempted but emitted the note for all
current-output models (regressed 24 clean -C models), so it was reverted; needs
a targeted STAGE 1 extractor fix instead.
Renamed dsca-clean68-models.json -> dsca-clean-models.json (now 85 models).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
