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          "payload_errors_per_block": [
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          "concealed_packets": 248,
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            209,
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            214,
            215,
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            220,
            221,
            222,
            223,
            224,
            225,
            228,
            229,
            232,
            233,
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            239,
            240,
            241,
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            255,
            256,
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            260,
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            280,
            282,
            284,
            286,
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            290,
            291,
            292,
            296,
            297,
            298,
            299,
            300,
            301,
            302,
            303,
            305,
            306,
            307,
            308,
            309,
            310,
            311,
            312,
            313,
            315,
            316,
            317,
            318,
            319,
            321,
            323,
            324,
            325,
            326,
            327,
            328,
            329,
            331,
            332,
            333,
            334,
            335,
            336,
            337,
            338,
            339,
            340,
            341,
            342,
            343,
            344,
            345,
            346,
            347,
            348,
            349
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          "iterations": [
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          "stable_blocks": 0,
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      "mean": {
        "raw_ber_percent": 13.413690476190476,
        "payload_ber_percent": 15.28968253968254,
        "failed_blocks": 21,
        "tested_blocks": 21
      }
    }
  ],
  "elapsed_seconds": 59.84087042399915,
  "note": "True BER computed outside receiver from sender references. Statistics may expose known lab payload; not a secure messaging claim."
}