L3 CHANNEL structure for timing budget, insertion loss, return loss,
crosstalk, and complete channel. Numeric PASS/FAIL only from existing
channel FACT; otherwise a visible skip. No OpenEMS, no invented S-parameters,
no M6 packs.
Instances, L0–L3 max level, measured/limit/margin/source/method, traceability chain. FAIL listed first, not under Warning. Visible skips. No pack numbers, no L3 solver.