diff --git a/__pycache__/csv_preprocessor.cpython-312.pyc b/__pycache__/csv_preprocessor.cpython-312.pyc
index 7cee646..46c8935 100644
Binary files a/__pycache__/csv_preprocessor.cpython-312.pyc and b/__pycache__/csv_preprocessor.cpython-312.pyc differ
diff --git a/csv_preprocessor.py b/csv_preprocessor.py
index 3b3bac4..78f42db 100644
--- a/csv_preprocessor.py
+++ b/csv_preprocessor.py
@@ -57,9 +57,10 @@ FLICKER_LP_LOW_MAX_NS = 50.0  # ns
 
 # Mode G: LP-low significantly shorter than the baseline seen on this hardware.
 # Normal LP-low (THS_PREPARE + THS_ZERO + preamble HS-0 symbols) measures ~379–380 ns.
-# Flicker-associated short LP-low values cluster at 34–194 ns (confirmed: cap 27 at 108 ns).
-# The gap between 194 and 379 ns is unambiguous — 250 ns splits the populations cleanly.
-LP_LOW_FLICKER_THRESHOLD_NS = 250.0  # ns — below this, LP-low is suspiciously short
+# Flicker-associated short LP-low values cluster at 7–311 ns (confirmed: cap 8 at 311 ns,
+# cap 27 at 108 ns).  All healthy captures sit at 379–380 ns.
+# Threshold set to 360 ns to split the populations cleanly while allowing ~20 ns measurement slack.
+LP_LOW_FLICKER_THRESHOLD_NS = 360.0  # ns — below this, LP-low is suspiciously short
 
 # CLK lane LP-00 minimum for SN65DSI83 CLK lane lock (TCLK_PREPARE + TCLK_ZERO ≥ 300 ns)
 CLK_LP_LOW_MIN_NS = 300.0
@@ -76,10 +77,10 @@ HS_BURST_AMPLITUDE_MIN_MV = 40.0  # mV — below this, no real HS burst is prese
 # exceeds HS_OSC_STD_V.  With dynamic video at 432 Mbps DDR each bit spans ~4.6 ns; transitions
 # (~1 ns) fire the 1 ns rolling window ~20% of the time → healthy HS → osc_frac ≈ 0.14–0.22.
 # Static solid-colour content (e.g. FF 33 BB repeating) has fewer bit transitions, so healthy
-# osc_frac is lower: ~0.11–0.17.  Blanking/control packets → osc_frac ≈ 0.00–0.02 (normal).
+# osc_frac is lower: ~0.12–0.15.  Blanking/control → osc_frac ≈ 0.00–0.02 (normal).
 # Confirmed partial/transient HS dropout (Apr-23, cap 0105): osc_frac = 0.079.
-# Suspicious zone must sit below the lowest healthy static-pink value (~0.11) and above true
-# dropout values (~0.04–0.08).  Threshold set to 0.10 to give clear separation.
+# Healthy static-pink reliably reaches ≥ 0.11; threshold at 0.10 gives clear separation for
+# definite HS dropout cases.  The 0.12–0.13 zone overlaps healthy and flicker — not reliable.
 HS_OSC_FRACTION_SUSPICIOUS_LO = 0.04   # below this: dead HS — blanking / control (normal)
 HS_OSC_FRACTION_SUSPICIOUS_HI = 0.10   # above this: healthy HS; between bands → flag