VR2R-0316_r1

VR2R-0316

① SA Source

• Source: 開啟完整 SA 文章
• Section: PCB vs Flyover Cables
• Line hint: 282

Context Before

Another factor that affects signal performance is cross-talk.

Evidence

Given the increase in the number of I/Os per GPU, lane density in the PCB also increases.

Context After

Cross-talk describes the scenario where the copper traces are too close to each other and the signal from one lane affects the signal in a neighboring lane. Some copper traces are designed for power as well. When the power lanes are too close to the signal lanes, noise from the power lanes can also modulate the signal as well.

② Atomic Claim

隨著每顆 GPU 的 I/O 數量增加，PCB 的 lane density 也會提高。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/GPU",
        "label": "GPU"
      },
      "role": "processor"
    },
    {
      "node": {
        "id": "04_knowledge_base/PCB",
        "label": "PCB"
      },
      "role": "routing_medium"
    }
  ],
  "qualifiers": {
    "condition_text": "lane density rises with I/O count per GPU",
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "relation_type": "MORE_GPU_IO_INCREASES_PCB_LANE_DENSITY"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
processor	GPU	GPU
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。