VR2R-0326_r1

VR2R-0326

① SA Source

• Source: 開啟完整 SA 文章
• Section: PCB vs Flyover Cables
• Line hint: 288

Context Before

For VR NVL72, the design has turned toward cableless given the higher density and manufacturing complexity of AI server. The cost saved on improving higher manufacturing yields and assembly time reduction more than offsets the higher cost of the upgraded PCB materials.

Evidence

It is critical that all the factors that contribute towards insertion loss in the PCB are mitigated, hence PCB material upgrades are necessary for VR NVL72.

Context After

② Atomic Claim

必須降低 PCB 中所有造成 insertion loss 的因素，因此 VR NVL72 必須升級 PCB materials。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "additional_nodes": [],
  "frame_type": "RELATION",
  "object": {
    "id": "04_knowledge_base/PCB",
    "label": "PCB"
  },
  "predicate": "REQUIRES_UPGRADED_PCB_MATERIALS",
  "qualifiers": {
    "condition_text": "to mitigate insertion-loss contributors",
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "subject": {
    "id": "04_knowledge_base/VR NVL72",
    "label": "VR NVL72"
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
subject	VR NVL72	04_knowledge_base/VR NVL72
object	PCB	PCB

⑤ Human Review

請在 Properties 逐項確認：

• 原文 → Atomic Claim 是否忠實
• Atomic Claim → Semantic Frame 是否忠實
• Canonical Entity mapping 是否正確
• Epistemic mode 是否保留原文語氣
• 最後選擇 review_action

Review state

Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。