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)

phy.go

@@ -38,7 +38,7 @@ type phyDev interface {
 }
 
 type snrSource interface {
-	snrMargins() ([4]float64, error)
+	snrMargins() ([4]float64, bool, error)
 }
 
 // PMA 1.1 latches low, so the first read reports any drop since it was last
@@ -137,10 +137,9 @@ func (m *phyModule) poll() error {
 	var margins [4]float64
 	haveSNR := false
 	if src, ok := m.dev.(snrSource); ok && link {
-		if margins, err = src.snrMargins(); err != nil {
+		if margins, haveSNR, err = src.snrMargins(); err != nil {
 			return err
 		}
-		haveSNR = true
 	}
 	blocks, ber, pcsRaw, err := devPCSLatch(m.dev)
 	if err != nil {
@@ -405,7 +404,18 @@ func measureCable(mods []*phyModule, done *atomic.Bool) (cableInfo, error) {
 	if err = devRestartAN(end); err != nil {
 		return c, err
 	}
-	waitCarrier([2]string{mods[0].dev.name(), mods[1].dev.name()}, done)
+	// A pair the diag just called faulted is not going to relink; waiting the
+	// full carrier timeout would hold the verdict hostage for 25 s on an
+	// unplugged cable.
+	healthy := true
+	for _, v := range c.ecd.verdicts {
+		if v != pairOK {
+			healthy = false
+		}
+	}
+	if healthy {
+		waitCarrier([2]string{mods[0].dev.name(), mods[1].dev.name()}, done)
+	}
 	for i, m := range mods {
 		b, ok := m.dev.(*bcm)
 		if !ok {