VR2R-0321_r1

VR2R-0321

① SA Source

• Source: 開啟完整 SA 文章
• Section: PCB vs Flyover Cables
• Line hint: 284

Context Before

In conclusion, insertion loss scales with signal frequency, and high-speed signal suffers more insertion loss from PCB than from fly over cables.

Evidence

Hence, as traditional CPU servers upgrade to higher signaling frequencies such as upgrading to newer PCIe generations, the CPU server design increases the adoption of fly over cables to compensate for insertion loss from the PCB.

Context After

The alternative solution would be upgrading PCB materials, however, fly over cables are more cost effective and remain feasible for traditional server applications.

② Atomic Claim

因此，traditional CPU servers 升級到更高 signaling frequencies、例如新版 PCIe generations 時，會增加採用 flyover cables，以補償 PCB 的 insertion loss。

• Epistemic Mode: ASSERTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/CPU",
        "label": "CPU"
      },
      "role": "server_processor"
    },
    {
      "node": {
        "id": "04_knowledge_base/PCIe",
        "label": "PCIe"
      },
      "role": "interface_generation"
    },
    {
      "node": {
        "id": "04_knowledge_base/PCB",
        "label": "PCB"
      },
      "role": "routing_medium"
    }
  ],
  "qualifiers": {
    "condition_text": "flyover cables are plain text; adoption offsets PCB insertion loss",
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "relation_type": "HIGHER_SERVER_SIGNAL_RATE_INCREASES_FLYOVER_CABLE_ADOPTION"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
server_processor	CPU	CPU
interface_generation	PCIe	PCIe
routing_medium	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。