From 4f45ff5a2006edfa05be51e6299a3ea757366b94 Mon Sep 17 00:00:00 2001
From: david rice <david.rice@arrive.com>
Date: Wed, 22 Apr 2026 09:56:51 +0100
Subject: [PATCH] Changes

---
 __pycache__/csv_preprocessor.cpython-312.pyc | Bin 46722 -> 47410 bytes
 csv_preprocessor.py                          |  41 ++++++++++++++++---
 2 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/__pycache__/csv_preprocessor.cpython-312.pyc b/__pycache__/csv_preprocessor.cpython-312.pyc
index 7d7e5782314c658a707c0d922029810e6b192fa5..d82c25821dd9eca6c1a7e3b643c172f350287948 100644
GIT binary patch
delta 4005
zcmZ`*YfxLq72ds)0HG@+Kms8UAP@rae!u+$^D+iMk~CK05X@ePfnZmXZH!mJNyyaB
zkQ#f_7zf9pahgy&6Wh7XBtJT>+j=@q-A+ZEbQtO%_OzXJ@@N#?nWi)COwUTXh{VkW
zojrT@Jic@G?B4s#7s5L$Lc&eGJ|4mI$LYWCldqpju;A=d`4?JAirX&53aA~C)G0(P
zmjtea(53Kz+&LsoiYHbnSJDi3M1*SwE@kmJU6($kcIT0d(EO@CSz}w}tRe1kY&K+q
zj#G=s*8itBnI+|uZ1~xwf>1n{<Qf#xAl9Hra;7xy!U&R_K{d$*Pel>j4#1svAMWC?
zHpv5RCuo<De0M1+Ag&={2$90qFwmmcFeyH#a+gWvQpKbaPO2m&%@CH9lCmMeT}8?z
z7XWfe6(KNcQUUI&Bf%>nc-4KuYa+p`Ab2%s*Ak<<E@Dvw7Pa?T)RX>Dok=a2)PYF@
zsSnk?94cQS6@)9naZ2%#s)TE!CJmt77;)YR&YSLY-b9*}-O#QJRhRD??1+9n*fx`H
zvO!s2w-I8g$tI}xx=0dDFy9P%>!l5(WuyQh&sBnnFuKvbQ9x3>wCNHKH^lH1gPk|D
zPUsMFx4>Gfv~l=(_SL~;cI{BCNVbf$g0Ukc1Vy}seXT0dwT)RpwOwi%KE=(8+7x%n
zNCeVuMea7KtrhLr0IoZsg*v3p;TPGMIxT;_)TwB?w~obuucEaQn0HHChvz~tvO5hd
zpw{4S_9t~#VvhrPa@@UKgLH=c*+p|zm()9lUQsJPG1`rY;O>2-cX}i|9>#~!xN0{#
zj9uFfwy6+`XZ^-xxnJ{zN;tMdZrAq5;wR;w8V3YCD(jQ)3b^OOmu59)axiUDg<qEs
z*sjImt8zu&oC*I${zJn}EvE9>mYo<Ml|OIYhVhWx*k*{s&&ypsA8Bz=&U&~(z@N#x
z-H*lMGWq@fqZm8o>VX;+Zjpxv<J9;7yE$c(XNDicc)$GR$Zj072hOqA%{H_-WY3dR
zG58tzU*6#ud|BQ*(T#BmyL|L+BT01Yq&P`Ul6kvB8AM6{mPtw6ognF9%^W%kDUxbX
zfEz;XHXJdyEbQm>hS~Ilx6iYGbada?P@mUF`UdwO93%3x{`Oe>U-{<L0Tq<F`S>jU
zkNolR=Tz9p{xRxclhY;;pPViiKjsMEgTT+BJEv2e?5pWMeNKKrZJBl4QahJ2?DEbR
z9u)8+Y~f^q?qO&#&u&g0VShfkMI!;*Ea%Of6L25<_2~jU$UZy$pk@rjU2F^cRZOKG
zp&!(;lLIpQ<%{*IT7L}NSZrp2v1H*yExX&kIpahvQS$?><m*cecQHbsu%W}s&i&|b
zxRyQhQmaTre+tq1Q{iV}kDoEc6aC1e2+atdyX>zomD$pK`HC%#p=rwb^IL|H-^$9*
zWa-i$g>3y9ej80^?lZYKojrBNHd(90Ci)4uoc)=;qE$aOU#`NR_?F(P|16&^szWn*
zHYaLn79Y7kVwlhX)vxMjQ|oYvVu295eJ-wmX3<QVJ*ZNkU^G3hM$|fkJr6`7P%G=2
zUFWj4qLcQMIRmO8G$8DWL+DXxf4?36a%j#eVLD!o22}nWznxu~Ez_s2Nhg(kKI=;R
zu0(QK>DjD37Me<Pt;kodK;%VMa1jkp%kNl&$)T)yGQUxXRO$$8Pk=?FD5>n?*&?%L
zjc?eH31}C89{coc*`(8#u0*AI)cIE2YSHq2&`RNlm}o4&+?2Tf0-6tZQXABPZ?DT=
z2pPBrgmGcS3azSzSpmnuXI?yQ9uuItmbF-w3Y8*63!|xh*N#V$ak1aNY%j8UMyNHM
zXlNS}{06@r`Y(YRtjJ#!^+t<W(p(EJVh_zV0X;oe+C>we{yt5OW=0c<g(D>iyk)+b
zC71h)6{N6Q9JM1R_VsK=8?`7USuI-$sI7KzbbSO0<tgyhg$s(1FInM+>)E0qxxqq<
zX~}mrffB`^0w=4K>O?e-J^2_>HA!P1&UMC?(K1gGEoFgoX4ZF3jNMCh-tatyJyoGg
z>!IS)-Bk27Dp5mtY+;MK3@Q@aoSI}t*XIz)dPSqeg-D{0Ux=Y6^g4^!HYv8*(e?Xm
zjZf!Oqi_AHJ+DP(IChzx8c7bs&W)~z=8kVfFY~%+k~a}-W?sn_X)@7-UdUVkDK|Ky
zK;f<`=Vb}4mr$Lj2=?4X6MY+3!^7zUopNskLRvm_0f$f!)d|gAOgx|7P{>Q=ub^h4
zJ&2*~15gaJZ}X}*SOqCu)R0J6qk!|i_3ZKUX57jSozI<wlM;S-Px11NV{b?cEI6M7
z78T${1!D@|TyNSMf5~BgiVuzlbmO>9s1YJo{>qRK1IQJuTF(1ACRa@%w7&|<Q^d;?
zaZ<MG1p3Nfy=K(}=G6ek2xAgxi!dfeAjbe-32Sh)X_ddmw^fNj*6l;2m<kM&5~=}O
zN;PU2%9#7rtjY4|EkL!zd<k;l53E;2k4^L%0C^=9fmTsH&}wP~T0;|o*3x94b<_m3
zo|=I+&?KOZv>a#?tpVB${egdocfqZV`3-GI@+TZtCU9LJMy~a8{Cu1M@6qJfzQjJJ
zx-cWeB6;RQmtgGX?_E2f^FXnX%gH|dNmmws)q2izVISvy%(?Gza)=X&?RsN#);wol
z=A@VFZ0BSLCp$UW#V)>4E-YKwrsK&89i8nRecK-LY=RY69lQI+Qz=`4UDkN}q%pFr
z_P`fL=mUW5d$WiA;?1$l<%H1#eWUvi^Yy-cWPDkK?~#Egq=6AGVZ{sU%aTB{_aK<|
z^^fg;vVU~{LGQ8-zE?*2y!%F_F`p-t*&YDs<rfk=wcup)4Mz6ff<<>0qVIyYo3|uR
zUS4<@8<*0v;p1dUG#=Z+Nvm9W@uDzkL}F$@=UTGmyuK??*!;e4v9RTuZ_%~&#@<EO
z_FH*77HvC@_uRH+&u9KD_sY;U;p*tE%9cfY%k^D1OuyNE%hr3md&yvXT{Yi&LHnV>
zbvwW4wkhRI+o`tM>iL8P8c1)xE-t2b-!g5xrxFU10!BwL9vPF4bu8Ijfi(G(x1Pm@
z3~l_9nEp{_-J)2xqRL=L-tL)9)RzWDWVFqz0|v*6o=;6EG4n%XW5C%M$Z1?Lb5RC}
z<{t<cT`NeHSh8fYf8?lHG}WxAV0Oon7ck|mXn+mIptO>JsW{kxG^Su1M%t7WBxoBT
z>U?!T%wJK#<PL{WzbMuRW06Lc8cbmN%VpIDZTuZEbp?s~ggeIE6{Jl}0$k?&1xLVC
z3Qo+0OQ}w<Hy7SXbp_MG|397ViOavYjl>{*<-hO27FBP@UJ>@^y2{|zCw-vRyOY_D
zD@`$8-YeVL=_}9I9|G2Mgp+S|+Bla{P9ESS+<2Vxb8?jRUVTBwKPEk)em=`Sxq2f0
zZJ5J9@_x!D-g#9UgEDgh$Qn$Lt#S~j4q%)eM4aAJAwd@uLV|8)e|J-An;OT=I)aFg
r^G)|cV{m62JM!-5wo*f<U46se-02iPaB8~rnh%OBU2&S<#c}?BKEAv`

delta 3276
zcmZuzdu&tJ89(Rx9ovbW*s-0&b{spgoj5Ot5JD0XLJ}ab!1_?Y<sq7L!-&(c+NR0E
zaZ@VVkqMO0L(3yjLfOW18s&~{|5RPIO)6#6KtdWqno1{4-6S@$P^q0nw|(c@H_1kA
z=R4o|-rw(h_uO2c7heCnkbBE)&Oz|`YWwGVZhmky*NIDx2G4hhIsvUkr0^gjjw=E;
zK<G+lK`|e3iaEq3mWi67o~&@m!lf)17aNNXs$&6CEbpzM0!@j+g<aq5IjALW@F_PS
z()&$*6CSaGc;T;949fXKVrWosLGD2l@g3B}!r97vgKAO+kt(x&_@R%$Q+-rrtVsZ@
z%fUKADq__nNJ6`X-H3$W!$2$F!=&o8Dpn)biggo8I<cNaS|Kf|CN;Z-Sd`R?At)#$
z*2%@FNgaf1$R@9c<k6>+FUuy6Lh=T%ZX}l2@~p=)@MwI>qlxU2aVL%7vK(AikS6&Y
zYT+d6#9#&qUZ<FoMJ0ocnydip=4|k02)^>E;44XsaynJ5GP>V*ws1mi5UYi3AgdJn
zwsy#^CLMr(YqqJCuwM;!ZQ?4@84n?pc%NV*47bPH1tjK(9anH>V1{02Fd2Dk#*GNY
zIzhKaY#%zrJ_{GH4@Y$-(iQIl=YT8(L)^ulsH%<KBSm1^BX$l=arbz)5>8o(KzfQ$
ztXu5vLfhLR^g0-+wc@&=x0cLlmVE^!3=pkNT&H-)dPnpisaz_7{RXjj=p?gNmT58K
zTXtXVwSFsr5@oSIz9;K=0`}1{TMbz+_RXL(Y9%5@TM-dreJ}JKj%U_UJc`CtThS;E
zZ<ID_v})-ELrjPFNI$m>2>3fvQNd>d?mhp+uEtZ+*RBZ_o|V$>U+M5qq*diJHvFk{
zzxkE{k4ZmX^9<IG0-VXeGCUlSD!WTC9+1}d<mvI7Qh(oF1AZt)wloX)b7?TPLx-!R
z-|pIvahbGwpiza}rO`pX8V^ga4S_H&J&A9{+O6=!Cu3}5Pe7V@>7W+BDydULT6{&?
zJH8PMdd%88{OrO04<gXEQ8ZmGQ2LCSMU$u|Hu>4Gi>g5Zt`K!B_j`F^2m2%aSh|t!
z(c!PyYeR0y^~SR*_MeLy_VS@)x-WUgQP_8tOZAg670zS-><+MNhi$B=$Il)fHfZl~
zldB9DI+&->&VomF3hpwA9eG~BG4{8qkg*>?NNnLG#!9BUH3ZluX>j_qfOjwz3t^E(
z*z=l~K-|sVWFKk&4MX?+D7(F{jO{&kQx#2XnfDz#+x)f-N7+Btc9u*=iJCvqN_#1*
zGCq@0ws~(6`_tQh0n=Z<)8$F|6%{oq=ENM|hS0Q-7-99tYu$yZ;DU{o7AlWm+OZp@
zoh*IaYjkac9@9nXV(MZSj{C8T-8$|LM;GIb!(E*&NmVVxDPGJAC0S269PX4`(N0Eb
z2`?X3H)}uPQhBJ8S<l)+)J;pMXHcaC#^~^v8d2voPCU055R8wXXbU^L(3E$obU?Km
z4G7!y2yIhA5nlL~($b^C;T$y@P^C-LUiS5gTC;CSaX!|3G7R`YS-6btKk3ytsE?Mh
zJExr;M8hjf`<JBiE9E3S|I>qy`ZLz!;F0ae$NOQHQ~7pBs!r)Q4(N@;>81m$=~QiT
zd8$~^&;TvJs$W37f*m+j><`ikxE<gHCZirohoQL8fG{S+i(rNfunV#ePq|&uB`t*)
z>y_~?)MpC{$puAb^i|G8oH{cF%Sh#>^U_|brMWb(2&F3*1JFvgb7l>$WanpEfPOkt
zlMj<nMU5sjh7&=IsG2yL=FECsghmqiv<lA7Uf@zt!f510YD{M3Z0L;1)kjSSHd0e+
zxzaaBB;n3@HWgD7DVb3d_o99V5ziUTVnpy=vEa*Z-mGtn;_F@1KjmvV5TusW$_0O(
z+mp#{D5VzSgWP58<*3^bNrq{D(wfmZ0!#825RLr0$m-bDca1f~kgn!X$ck!eOjJ?p
zfiShE_$?!U_+th()yZr+R|U1o>4J+k@*Ym<Z1JWrhb3J@?ZmJT1JqjqYI|zcLNw5V
zv=5|~tVM|POIm|`VBwbiI@qPN{)tY-n-3{}X^r8eCmVtDPT*@`wPj^IZ!YJTM9t(?
zaZ3|Q*Fw*gyl1e~gDfJC1=qrWr0bSwEf{suItXq8Wq#J&3Z?VJ0?2C9^{H;9K+?Jg
zkt!-MOd?bR6u<>q!~QVq#kK6wtgF9naY!c@ZXd9zrzW6LY6jXsEkKu1E6_$-0CYLE
z0d1mopetxT&}Lc<bS13^+5)G&^PEcu7sV(Fw@DM{^a9+-ht5C3d)e3zrzP``)(Vyl
z{QCAmsR?Kth5hW2=wX(mhs|Ed_41oL@h(^H;M_UR^>gwHCxrd}LZ=;04J9^lvYC@_
zbMg$Uxmc%5tOh>Zzz$q|HHW_??yD2Y6k+yDeHu-2r#QlPUHUG2bZM2-IJ{>hzB9RJ
zSR6?u<bt+C{A2^0Zmwt7n$_&B%TD7lh|mWYVN%pdH!g3%lKbjq0h^@OpB}+^E<?^e
zQ}JC-(;ZXOyvoJyUF++~H3#QR$l{(=-_8rnoB7rP+j%SJoXF~#eeSj;JdXrx#XXzv
zZlLjwt#Mujy9dtl+qUw#2BfjgwX%!v*G6&;IS)*Zd1N%_KCt-bk=~jQq3ywof!ns4
zd4%o3dya}Z7dU(oV8-jebB}6}Ir^{1Js2(93{wK#{6>}6-;jS(W$tfgUtDj|CO9^m
zSfliVhJC;$#yI&uEcrhfiT#{B%Si@W&W*D#r6WfEx=qMObc{{?Y%=E(?BR!!e`aMj
z&H^-_+?d0T7cnlKL!3TVA;CB&$bw#W=NGFT!z!#j5tu`Koo#t6uX8(eEd0xd?nvHx
buli$e>-vCjGoa};YHo&|y;{vDTF(C$4k!N^

diff --git a/csv_preprocessor.py b/csv_preprocessor.py
index a8751eb..e1b204f 100644
--- a/csv_preprocessor.py
+++ b/csv_preprocessor.py
@@ -65,6 +65,10 @@ CLK_LP_LOW_MIN_NS = 300.0
 HS_BURST_AMPLITUDE_MIN_MV = 40.0  # mV — below this, no real HS burst is present
 #   Lowered from 50 mV: 48 mV capture (0001) was a false alarm; true flicker (0008) at 34 mV.
 
+HS_BURST_AMPLITUDE_HIGH_MV = 70.0  # mV — above this with short LP-low → anomalous LP states
+#   Normal HS (dynamic video) = ~15–40 mV P95-P5/2 on LP probe (RC-filtered).
+#   LP-01/LP-10 states in the burst window (cap 0042 type) produce 130+ mV → flag these.
+
 # Mode A minimum amplitude: LP-11-return edge artifacts produce near-zero amplitude in the
 # burst window (burst is pure LP-low DC between two LP-11 regions).  Require ≥ this to
 # distinguish a genuine weak-HS attempt from a false rolling-std trigger on LP-11 return.
@@ -752,6 +756,7 @@ class LPMetrics:
     # Flicker detection
     # A capture is flagged when the LP-low plateau is absent or shorter than
     # FLICKER_LP_LOW_MAX_NS.  Normal captures show ~340 ns; flicker shows 0–50 ns.
+    hs_rolling_std_found: bool = False  # rolling-std fired in HS window after LP-low ended
     flicker_suspect: bool = False
 
     warnings: list = field(default_factory=list)
@@ -891,6 +896,9 @@ def analyze_lp_file(path: Path) -> "LPMetrics":
     n_hs_bursts      = 0
     hs_burst_dur_ns  = None
     hs_amplitude_mv  = None
+    hs_rolling_std_found = False
+    s_end = None
+    rstd  = None
 
     if len(lp11_regions) >= 1:
         # Measure LP-11 → HS exit gap (LP-01 + LP-00 combined) using a rolling
@@ -943,6 +951,17 @@ def analyze_lp_file(path: Path) -> "LPMetrics":
                      float(np.percentile(burst_volts, 5))) / 2 * 1000, 1
                 )
 
+        # Did rolling-std fire in the actual HS window (after LP-low ended)?
+        # With dynamic display content (video), genuine HS keeps rolling-std above
+        # threshold; absent HS does not.  Used to gate Mode B/D false positives.
+        if lp_low_duration_ns is not None:
+            lp_low_end_idx = s_end + int((lp_low_duration_ns + 50.0) * 1e-9 / dt)
+            hs_check_end   = min(lp_low_end_idx + int(1000e-9 / dt), len(rstd))
+            if lp_low_end_idx < len(rstd):
+                hs_rolling_std_found = bool(
+                    np.any(rstd[lp_low_end_idx:hs_check_end] >= HS_OSC_STD_V)
+                )
+
     # ── Warnings ─────────────────────────────────────────────────────────
     warnings = []
     continuous_hs_clk = (not lp11_regions) and (channel == "clk") and (float(volts.max()) < LP11_HIGH_V)
@@ -1027,16 +1046,27 @@ def analyze_lp_file(path: Path) -> "LPMetrics":
             # Mode A2: rolling-std never fired — HS absent or amplitude below HS_OSC_STD_V;
             # weak oscillations are misclassified as LP-low, masking the true HS failure
             or lp11_to_hs_ns is None
-            # Mode B: LP-low anomalously short + low amplitude = marginal HS launch
-            or _lp_low_short
+            # Mode B: LP-low anomalously short + low amplitude = marginal HS launch.
+            # Gated by hs_rolling_std_found: if HS actually launched (rolling-std fires
+            # after LP-low ends), LP-low being short is a timing anomaly but not a flicker.
+            or (_lp_low_short and not hs_rolling_std_found)
             # Mode D: LP-low normal, noise-spike lp11_to_hs (< 50 ns), low HS amplitude.
-            # Requires dynamic display content (video) during the test — with static/DC content
-            # the probe noise floor is 15–35 mV regardless of HS health, making this unreliable.
+            # Requires video/dynamic content. Gate: if rolling-std fires after LP-low ends,
+            # HS launched normally and the early lp11_to_hs was just the LP-low edge trigger.
             or (lp11_to_hs_ns is not None
                 and lp11_to_hs_ns < LP_LOW_DUR_MIN_NS
-                and not _lp_low_short)
+                and not _lp_low_short
+                and not hs_rolling_std_found)
         )
     )
+    # Mode E: short LP-low with anomalously HIGH amplitude — LP-01/LP-10 states in the
+    # burst window (link failed to launch HS cleanly).  Normal LP probe HS = 15–40 mV;
+    # LP-01/LP-10 DC levels produce 70+ mV.  Confirmed: cap 0042 (lp_low=61 ns, amp=133 mV).
+    hs_burst_anomalous = (
+        _lp_low_short
+        and hs_amplitude_mv is not None
+        and hs_amplitude_mv > HS_BURST_AMPLITUDE_HIGH_MV
+    )
     # Mode C: no LP-11 at all → link silent (but exclude CLK which is always HS)
     link_silent = (
         channel == "dat"
@@ -1056,6 +1086,7 @@ def analyze_lp_file(path: Path) -> "LPMetrics":
                     # positives when noise triggers gave lp_low < 50 ns with normal HS.
                     lp_low_duration_ns is None
                     or hs_burst_absent
+                    or hs_burst_anomalous
                 )
             )
         )