Unplugged-cable behavior fixed end to end: heat grid rolls on the slot boundary (view computes the newest slot from the draw clock; history sampled every frame so slots color within a frame; noise phase displayed as commanded straight from the shared clock — radiating and the per-slot vote deleted), SNR ghost panic disambiguated via the PMA 1.1 latch (link dropped mid-read discards the batch, ghost on a proven-up link still dies), measure skips the 25s relink wait when the ECD verdict says faulted and the header says MEASURING instead of GOOD while a diag runs, RollBall mailbox deadline resized to 10s from bench measurement (<25ms linked, ~220ms no-link, >3s during a live plug's training; docs/modules/wiitek updated)

ui.go

@@ -326,8 +326,10 @@ func (d *display) heatCell(rowY, k int, c rgb) {
 
 // The verdict names the newest thing wrong at any horizon: the cable's own
 // fault first, then the most recent traffic fault with its age, and only a
-// clean record reads GOOD.
-func (d *display) drawHeader(v view, phy phyDisplay, hv histView, now time.Time) {
+// clean record reads GOOD. While a measure runs the tester is asserting
+// nothing, and says so instead of GOOD.
+func (d *display) drawHeader(v view, phy phyDisplay, hv histView, measuring bool,
+	now time.Time) {
 	good := true
 	word, sub := "GOOD", []seg{{d.text, "no faults", uiInk2}}
 	if i, age, ok := hv.newestFault(now); ok {
@@ -349,13 +351,18 @@ func (d *display) drawHeader(v view, phy phyDisplay, hv histView, now time.Time)
 	if !good {
 		col = uiCrit
 	}
+	if measuring {
+		word, sub, col = "MEASURING", []seg{{d.text, "cable diag running", uiInk2}}, uiMuted
+	}
 	rx, ry := uiMargin, headerTop
 	d.fb.roundRect(rx, ry, ringD, ringD, ringD/2, col)
 	d.fb.roundRect(rx+ringEdge, ry+ringEdge, ringD-2*ringEdge, ringD-2*ringEdge,
 		ringD/2-ringEdge, uiBg)
-	if good {
+	switch {
+	case measuring:
+	case good:
 		d.check(rx+ringD/2, ry+ringD/2, 44, col)
-	} else {
+	default:
 		d.cross(rx+ringD/2, ry+ringD/2, 40, col)
 	}
 
@@ -476,11 +483,13 @@ func (d *display) drawRows(v view, phy phyDisplay, measuring bool, nv noiseView,
 			} else {
 				d.colText(d.text, nowR, y, state, uiInk2)
 			}
+			// The lane shows the commanded phase, a pure function of each
+			// slot's parity; only slots the run never lived through are unknown.
 			for k, s := range hv.slots {
 				c := uiCellNA
-				if s.sampled && s.noiseN > 0 {
+				if s.sampled {
 					c = uiNoise0
-					if 2*s.noiseOn >= s.noiseN {
+					if slotUp(s.seq) {
 						c = uiNoise
 					}
 				}
@@ -548,7 +557,7 @@ func (d *display) render(v view, elapsed time.Duration, phy phyDisplay,
 	fb := d.fb
 	fb.fill(uiBg)
 
-	d.drawHeader(v, phy, hv, time.Now())
+	d.drawHeader(v, phy, hv, measuring, time.Now())
 	d.hairline(d.headerH - 1)
 	d.drawColHeaders()
 	d.drawRows(v, phy, measuring, nv, hv, target)