{
 "commit": {
  "sha": "2154b4227aafa3d20183ab427f2d117ba8006cda",
  "date": "2022-10-06T06:27:24-04:00",
  "subject": "HackRF One: add resistance to amplifier supplies",
  "url": "https://github.com/greatscottgadgets/hackrf/commit/2154b4227aafa3d20183ab427f2d117ba8006cda",
  "board": "hardware/hackrf-one/hackrf-one.kicad_pcb"
 },
 "project": {
  "title": "HackRF One",
  "repo": "https://github.com/greatscottgadgets/hackrf",
  "licence": "CERN-OHL-P-2.0"
 },
 "impactDiff": {
  "schema": "nativecad.impactDiff/1",
  "inputs": {
   "before": {
    "format": "kicad_pcb",
    "source": {
     "repo": "https://github.com/greatscottgadgets/hackrf",
     "sha": "e15bb0e97232bac5595c767cb341579d0da53840",
     "path": "hardware/hackrf-one/hackrf-one.kicad_pcb"
    }
   },
   "after": {
    "format": "kicad_pcb",
    "source": {
     "repo": "https://github.com/greatscottgadgets/hackrf",
     "sha": "2154b4227aafa3d20183ab427f2d117ba8006cda",
     "path": "hardware/hackrf-one/hackrf-one.kicad_pcb"
    }
   },
   "optionsSha256": null,
   "engine": null
  },
  "layoutDiff": {
   "schema": "pcbDiff/1",
   "identical": false,
   "tolerances": {
    "posTol": 0.001,
    "rotTol": 0.01,
    "widthTol": 0.0001,
    "drillTol": 0.0001,
    "lengthTol": 0.0001,
    "areaTol": 0.000001,
    "thickTol": 0.000001,
    "routeTol": 0.01,
    "sampleStep": 0.1,
    "minPadOverlap": 0.6
   },
   "summary": {
    "components": {
     "added": 2,
     "removed": 0,
     "renamed": 0,
     "moved": 3,
     "rotated": 3,
     "flipped": 0,
     "footprintChanged": 0,
     "valueChanged": 0
    },
    "nets": {
     "added": 2,
     "removed": 0,
     "renamed": 0,
     "changed": 6,
     "rerouted": 6
    },
    "outlineChanged": false,
    "stackupChanged": false
   },
   "components": {
    "source": "explicit",
    "counts": {
     "a": 420,
     "b": 422
    },
    "added": [
     {
      "refdes": "R42",
      "footprint": "hackrf:GSG-0402",
      "value": "39",
      "at": [
       70.2,
       151.3
      ],
      "rot": 270,
      "side": "front",
      "pads": 2
     },
     {
      "refdes": "R43",
      "footprint": "hackrf:GSG-0402",
      "value": "39",
      "at": [
       78.4,
       163.7
      ],
      "rot": 270,
      "side": "front",
      "pads": 2
     }
    ],
    "removed": [],
    "renamed": [],
    "moved": [
     {
      "refdes": "C163",
      "from": [
       70.598,
       151.777
      ],
      "to": [
       69.1,
       151.3
      ],
      "delta": [
       -1.498,
       -0.477
      ],
      "distance": 1.572111001
     },
     {
      "refdes": "R24",
      "from": [
       75.6927,
       168.8198
      ],
      "to": [
       76.5,
       167.7
      ],
      "delta": [
       0.8073,
       -1.1198
      ],
      "distance": 1.380465621
     },
     {
      "refdes": "R29",
      "from": [
       73.9,
       147.967
      ],
      "to": [
       73.05,
       148.15
      ],
      "delta": [
       -0.85,
       0.183
      ],
      "distance": 0.869476279
     }
    ],
    "rotated": [
     {
      "refdes": "C163",
      "delta": 90,
      "from": 0,
      "to": 90,
      "basis": "footprint"
     },
     {
      "refdes": "R24",
      "delta": 180,
      "from": 180,
      "to": 0,
      "basis": "footprint"
     },
     {
      "refdes": "R29",
      "delta": 180,
      "from": 180,
      "to": 0,
      "basis": "footprint"
     }
    ],
    "flipped": [],
    "footprintChanged": [],
    "valueChanged": []
   },
   "nets": {
    "added": [
     {
      "name": "Net-(Q1-Pad3)",
      "lengthMm": 2.436706016,
      "width": {
       "min": 0.508,
       "max": 0.508
      },
      "vias": {
       "count": 0,
       "drills": {}
      },
      "regionAreaMm2": 0,
      "pads": [
       "Q1.3",
       "R42.2"
      ],
      "layers": [
       "F.Cu"
      ]
     },
     {
      "name": "Net-(Q2-Pad3)",
      "lengthMm": 1.241869798,
      "width": {
       "min": 0.508,
       "max": 0.508
      },
      "vias": {
       "count": 0,
       "drills": {}
      },
      "regionAreaMm2": 0,
      "pads": [
       "Q2.3",
       "R43.1"
      ],
      "layers": [
       "F.Cu"
      ]
     }
    ],
    "removed": [],
    "renamed": [],
    "changed": [
     {
      "name": "!RX_AMP_PWR",
      "length": {
       "a": 129.649732892,
       "b": 129.829335893,
       "delta": 0.179603001,
       "perLayer": {
        "F.Cu": {
         "a": 5.505413594,
         "b": 5.685016595,
         "delta": 0.179603001
        }
       }
      },
      "width": {
       "min": {
        "a": 0.2032,
        "b": 0.2032
       },
       "max": {
        "a": 0.508,
        "b": 0.2032
       },
       "perLayer": {
        "F.Cu": {
         "a": {
          "min": 0.2032,
          "max": 0.508
         },
         "b": {
          "min": 0.2032,
          "max": 0.2032
         }
        }
       }
      },
      "copperArea": {
       "a": 0,
       "b": 0,
       "delta": 0,
       "perLayer": {},
       "note": "pour (region) area only"
      },
      "vias": {
       "a": 2,
       "b": 2,
       "delta": 0,
       "drills": {
        "a": {
         "0.3302": 2
        },
        "b": {
         "0.3302": 2
        }
       },
       "drillDelta": {}
      },
      "pads": {
       "a": 4,
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       "added": [],
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      },
      "reroutedLengthMm": {
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      },
      "viasMoved": {
       "removed": 0,
       "added": 0
      },
      "rerouted": true
     },
     {
      "name": "!TX_AMP_PWR",
      "length": {
       "a": 94.476432112,
       "b": 94.43443707,
       "delta": -0.041995042,
       "perLayer": {
        "F.Cu": {
         "a": 14.585311514,
         "b": 14.586834666,
         "delta": 0.001523152
        },
        "B.Cu": {
         "a": 79.891120598,
         "b": 79.847602404,
         "delta": -0.043518195
        }
       }
      },
      "width": {
       "min": {
        "a": 0.2032,
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       },
       "max": {
        "a": 0.2032,
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       "perLayer": {}
      },
      "copperArea": {
       "a": 0,
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       "delta": 0,
       "perLayer": {},
       "note": "pour (region) area only"
      },
      "vias": {
       "a": 2,
       "b": 2,
       "delta": 0,
       "drills": {
        "a": {
         "0.3302": 2
        },
        "b": {
         "0.3302": 2
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       },
       "drillDelta": {}
      },
      "pads": {
       "a": 4,
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       "added": [],
       "removed": []
      },
      "reroutedLengthMm": {
       "removed": 4.45049079,
       "added": 4.349774185
      },
      "viasMoved": {
       "removed": 1,
       "added": 1
      },
      "rerouted": true
     },
     {
      "name": "GND",
      "length": {
       "a": 560.342010599,
       "b": 560.409089574,
       "delta": 0.067078976,
       "perLayer": {
        "F.Cu": {
         "a": 438.225816822,
         "b": 438.292895798,
         "delta": 0.067078976
        }
       }
      },
      "width": {
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        "a": 0.2032,
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       },
       "max": {
        "a": 1.27,
        "b": 1.27
       },
       "perLayer": {}
      },
      "copperArea": {
       "a": 7735.567436071,
       "b": 7739.786026541,
       "delta": 4.21859047,
       "perLayer": {
        "In1.Cu": {
         "a": 7735.567436071,
         "b": 7739.786026541,
         "delta": 4.21859047
        }
       },
       "note": "pour (region) area only"
      },
      "vias": {
       "a": 233,
       "b": 233,
       "delta": 0,
       "drills": {
        "a": {
         "0.635": 159,
         "0.4064": 45,
         "0.508": 16,
         "0.3302": 13
        },
        "b": {
         "0.635": 158,
         "0.4064": 45,
         "0.508": 17,
         "0.3302": 13
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       },
       "drillDelta": {
        "0.635": {
         "a": 159,
         "b": 158
        },
        "0.508": {
         "a": 16,
         "b": 17
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       }
      },
      "pads": {
       "a": 280,
       "b": 280,
       "added": [],
       "removed": []
      },
      "reroutedLengthMm": {
       "removed": 0.899521024,
       "added": 0.9666
      },
      "viasMoved": {
       "removed": 1,
       "added": 1
      },
      "rerouted": true
     },
     {
      "name": "Net-(C160-Pad1)",
      "length": {
       "a": 4.035521305,
       "b": 3.944760115,
       "delta": -0.090761191,
       "perLayer": {
        "F.Cu": {
         "a": 4.035521305,
         "b": 3.944760115,
         "delta": -0.090761191
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       }
      },
      "width": {
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        "a": 0.508,
        "b": 0.508
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       "max": {
        "a": 0.508,
        "b": 0.508
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       "perLayer": {}
      },
      "copperArea": {
       "a": 0,
       "b": 0,
       "delta": 0,
       "perLayer": {},
       "note": "pour (region) area only"
      },
      "vias": {
       "a": 0,
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       "delta": 0,
       "drills": {
        "a": {},
        "b": {}
       },
       "drillDelta": {}
      },
      "pads": {
       "a": 4,
       "b": 4,
       "added": [
        "R43.2"
       ],
       "removed": [
        "Q2.3"
       ]
      },
      "reroutedLengthMm": {
       "removed": 1.299232085,
       "added": 1.208470895
      },
      "viasMoved": {
       "removed": 0,
       "added": 0
      },
      "rerouted": true
     },
     {
      "name": "Net-(C163-Pad2)",
      "length": {
       "a": 4.171015367,
       "b": 3.816998512,
       "delta": -0.354016855,
       "perLayer": {
        "F.Cu": {
         "a": 4.171015367,
         "b": 3.816998512,
         "delta": -0.354016855
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       }
      },
      "width": {
       "min": {
        "a": 0.508,
        "b": 0.508
       },
       "max": {
        "a": 0.508,
        "b": 0.508
       },
       "perLayer": {}
      },
      "copperArea": {
       "a": 0,
       "b": 0,
       "delta": 0,
       "perLayer": {},
       "note": "pour (region) area only"
      },
      "vias": {
       "a": 0,
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       "delta": 0,
       "drills": {
        "a": {},
        "b": {}
       },
       "drillDelta": {}
      },
      "pads": {
       "a": 4,
       "b": 4,
       "added": [
        "R42.1"
       ],
       "removed": [
        "Q1.3"
       ]
      },
      "reroutedLengthMm": {
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       "added": 2.572398512
      },
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       "added": 0
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      "rerouted": true
     },
     {
      "name": "VAA",
      "length": {
       "a": 106.84404864,
       "b": 107.076889174,
       "delta": 0.232840534,
       "perLayer": {
        "F.Cu": {
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         "b": 84.126633053,
         "delta": 0.232840534
        }
       }
      },
      "width": {
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       },
       "max": {
        "a": 0.508,
        "b": 0.508
       },
       "perLayer": {}
      },
      "copperArea": {
       "a": 2368.875714168,
       "b": 2369.146620087,
       "delta": 0.270905919,
       "perLayer": {
        "In2.Cu": {
         "a": 2368.875714168,
         "b": 2369.146620087,
         "delta": 0.270905919
        }
       },
       "note": "pour (region) area only"
      },
      "vias": {
       "a": 36,
       "b": 34,
       "delta": -2,
       "drills": {
        "a": {
         "0.635": 17,
         "0.4064": 11,
         "0.508": 1,
         "0.3302": 7
        },
        "b": {
         "0.635": 15,
         "0.4064": 11,
         "0.508": 1,
         "0.3302": 7
        }
       },
       "drillDelta": {
        "0.635": {
         "a": 17,
         "b": 15
        }
       }
      },
      "pads": {
       "a": 80,
       "b": 80,
       "added": [],
       "removed": []
      },
      "reroutedLengthMm": {
       "removed": 1.957605122,
       "added": 2.190445656
      },
      "viasMoved": {
       "removed": 2,
       "added": 0
      },
      "rerouted": true
     }
    ]
   },
   "outline": {
    "changed": false,
    "loops": {
     "a": 12,
     "b": 12
    },
    "bbox": {
     "a": [
      60,
      100,
      180,
      175
     ],
     "b": [
      60,
      100,
      180,
      175
     ]
    },
    "size": {
     "a": [
      120,
      75
     ],
     "b": [
      120,
      75
     ]
    },
    "perimeterMm": {
     "a": 389.936909795,
     "b": 389.936909795,
     "delta": 0
    },
    "areaMm2": {
     "a": 1462.593742325,
     "b": 1462.593742325,
     "delta": 0
    },
    "changedLengthMm": {
     "removed": 0,
     "added": 0
    }
   },
   "stackup": {
    "changed": false,
    "added": [],
    "removed": [],
    "modified": [],
    "reordered": false,
    "thickness": null
   },
   "warnings": []
  },
  "bomDiff": {
   "summary": {
    "added": 0,
    "removed": 0,
    "qtyChanged": 1,
    "valueChanged": 0,
    "footprintChanged": 0,
    "mpnChanged": 0,
    "dnpToggled": 0,
    "categoryChanged": 0,
    "total": 1,
    "unchanged": 420
   },
   "added": [],
   "removed": [],
   "qtyChanged": [
    {
     "kind": "qty-changed",
     "category": "SCH",
     "key": "mpn:rmcf0402jt39r0",
     "part": {
      "value": "39",
      "footprint": "hackrf:GSG-0402",
      "mpn": "RMCF0402JT39R0",
      "manufacturer": "Stackpole"
     },
     "qtyFrom": 29,
     "qtyTo": 31,
     "refsAdded": [
      "R42",
      "R43"
     ],
     "refsRemoved": [],
     "refs": [
      "R19",
      "R30",
      "R31",
      "R32",
      "R33",
      "R34",
      "R38",
      "R39",
      "R42",
      "R43",
      "R44",
      "R45",
      "R50",
      "R53",
      "R60",
      "R77",
      "R78",
      "R79",
      "R80",
      "R81",
      "R86",
      "R87",
      "R88",
      "R89",
      "R90",
      "R91",
      "R94",
      "R96",
      "R98",
      "R99",
      "R100"
     ]
    }
   ],
   "valueChanged": [],
   "footprintChanged": [],
   "mpnChanged": [],
   "dnpToggled": [],
   "categoryChanged": [],
   "byCategory": {
    "SCH": {
     "qtyChanged": 1
    },
    "PCB": {},
    "BOARD_FEATURE": {}
   }
  },
  "impacts": [
   {
    "id": "39c328b5cad583a3",
    "kind": "cert",
    "scope": "board",
    "metric": "ipc6012.pBreakout",
    "before": 0.146,
    "after": 0.149,
    "delta": 0.003,
    "limit": {
     "value": "2",
     "kind": "band",
     "source": "IPC-6012 Class 2"
    },
    "severity": "low",
    "why": "IPC-6012 Class 2: !TX_AMP_PWR via moved; GND via drill 0.3302/0.4064/0.508/0.635 -> 0.3302/0.4064/0.508/0.635 mm; VAA vias 36 -> 34 - board breakout probability 0.146 -> 0.149 (+0.003), pre-check passes.",
    "causes": [
     "layoutDiff.nets.changed[!TX_AMP_PWR]",
     "layoutDiff.nets.changed[GND]",
     "layoutDiff.nets.changed[VAA]"
    ],
    "assumptionDependent": true
   },
   {
    "id": "db0fc467ceea51f9",
    "kind": "bom",
    "ref": "R42",
    "refs": [
     "R42",
     "R43"
    ],
    "category": "SCH",
    "metric": "qty",
    "before": 29,
    "after": 31,
    "delta": 2,
    "severity": "info",
    "why": "SCH line RMCF0402JT39R0: R42, R43 qty changed (qty 29 -> 31).",
    "causes": [
     "bomDiff.qtyChanged[R42]",
     "bomDiff.qtyChanged[R43]"
    ],
    "assumptionDependent": false
   },
   {
    "id": "b556576de7ca2510",
    "kind": "impedance",
    "net": "Net-(Q1-Pad3)",
    "layer": "F.Cu",
    "metric": "z0Ohm",
    "before": null,
    "after": 40.49,
    "delta": null,
    "severity": "info",
    "why": "Net-(Q1-Pad3): new net; R42 added; R42 added to the 39 line (qty 29 -> 31) - Z0 on F.Cu appeared at 40.49 ohm, with no limit to judge against.",
    "causes": [
     "layoutDiff.components.added[R42]",
     "layoutDiff.nets.added[Net-(Q1-Pad3)]"
    ],
    "assumptionDependent": true
   },
   {
    "id": "a737a18e2738bc13",
    "kind": "impedance",
    "net": "Net-(Q2-Pad3)",
    "layer": "F.Cu",
    "metric": "z0Ohm",
    "before": null,
    "after": 40.49,
    "delta": null,
    "severity": "info",
    "why": "Net-(Q2-Pad3): new net; R43 added; R43 added to the 39 line (qty 29 -> 31) - Z0 on F.Cu appeared at 40.49 ohm, with no limit to judge against.",
    "causes": [
     "layoutDiff.components.added[R43]",
     "layoutDiff.nets.added[Net-(Q2-Pad3)]"
    ],
    "assumptionDependent": true
   }
  ],
  "summary": {
   "counts": {
    "high": 0,
    "medium": 0,
    "low": 1,
    "info": 3
   },
   "headline": "4 impact(s) (1 low); worst: IPC-6012 Class 2: !TX_AMP_PWR via moved; GND via drill 0.3302/0.4064/0.508/0.635 -> 0.3302/0.4064/0.508/0.635 mm; VAA vias 36 -> 34 - board breakout probability 0.146 -> 0.149 (+0.003), pre-check passes.",
   "markdown": "**4 impact(s) (1 low); worst: IPC-6012 Class 2: !TX_AMP_PWR via moved; GND via drill 0.3302/0.4064/0.508/0.635 -> 0.3302/0.4064/0.508/0.635 mm; VAA vias 36 -> 34 - board breakout probability 0.146 -> 0.149 (+0.003), pre-check passes.** Layout: components: 2 added, 3 moved, 3 rotated; nets: 2 added, 6 rerouted. BOM: 1 changed quantity. Re-analysed on both revisions, for the changed nets and parts only: impedance, cert, returnPath. LOW: IPC-6012 Class 2: !TX_AMP_PWR via moved; GND via drill 0.3302/0.4064/0.508/0.635 -> 0.3302/0.4064/0.508/0.635 mm; VAA vias 36 -> 34 - board breakout probability 0.146 -> 0.149 (+0.003), pre-check passes. Not run for missing inputs: cert.creepage (see refused). Rows marked assumptionDependent rest on ledgered typical values."
  },
  "analysed": {
   "ran": [
    "impedance",
    "cert",
    "returnPath"
   ],
   "nets": [
    "!RX_AMP_PWR",
    "!TX_AMP_PWR",
    "GND",
    "Net-(C160-Pad1)",
    "Net-(C163-Pad2)",
    "Net-(Q1-Pad3)",
    "Net-(Q2-Pad3)",
    "VAA"
   ],
   "rails": []
  },
  "assumptions": {
   "before": [
    {
     "source": "default",
     "analysis": "impedance",
     "key": "mask.er",
     "value": 3.8,
     "citation": "LPI solder mask epsilon_r 3.8 (NativeCAD default)",
     "verified": false,
     "affects": [
      "outer-layer traces"
     ]
    },
    {
     "source": "derived",
     "analysis": "impedance",
     "key": "no_target",
     "value": "no impedance targets (netClasses / .kicad_pro)",
     "affects": [
      "every row: status no_target"
     ]
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "fab",
     "value": "jlcpcb",
     "citation": "fab profile jlcpcb (NativeCAD default)",
     "verified": true,
     "affects": []
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "ipc6012.drillPositionTolMm",
     "value": 0.075,
     "unit": "mm",
     "citation": "NativeCAD default (typical standard-technology rigid fab; no fab publishes it)",
     "verified": false,
     "affects": [
      "ipc6012"
     ]
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "ipc6012.innerRegistrationTolMm",
     "value": 0.075,
     "unit": "mm",
     "citation": "NativeCAD default (typical standard-technology rigid fab; no fab publishes it)",
     "verified": false,
     "affects": [
      "ipc6012"
     ]
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "ipc6012.outerRegistrationTolMm",
     "value": 0.05,
     "unit": "mm",
     "citation": "NativeCAD default (typical standard-technology rigid fab; no fab publishes it)",
     "verified": false,
     "affects": [
      "ipc6012"
     ]
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "ipcClass",
     "value": "2",
     "citation": "IPC-6012 Class 2 (dedicated service) - the general commercial default",
     "verified": true,
     "affects": []
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "motC",
     "value": 105,
     "citation": "requested MOT 105 C (FR-4 laminates' common UL RTI)",
     "verified": false,
     "affects": [],
     "unit": "C"
    },
    {
     "source": "default",
     "analysis": "returnPath",
     "key": "erEff",
     "value": 4,
     "citation": "effective epsilon_r 4 for the stitching distance (NativeCAD default)",
     "verified": false,
     "affects": []
    },
    {
     "source": "derived",
     "analysis": "returnPath",
     "key": "planes",
     "value": [
      "In1.Cu:GND",
      "In2.Cu:VCC"
     ],
     "citation": "inner layer with >= 30 % pour cover of one net (outer: >= 80 % and no other net's traces); voids = holes >= 2 mm^2 in that net's pours, as bounding rectangles",
     "affects": [
      "every finding"
     ]
    },
    {
     "source": "default",
     "analysis": "returnPath",
     "key": "riseTimeNs",
     "value": 1,
     "citation": "edge rise time 1 ns, f_knee = 0.35 / t_r (Johnson & Graham)",
     "verified": true,
     "affects": [],
     "unit": "ns"
    }
   ],
   "after": [
    {
     "source": "default",
     "analysis": "impedance",
     "key": "mask.er",
     "value": 3.8,
     "citation": "LPI solder mask epsilon_r 3.8 (NativeCAD default)",
     "verified": false,
     "affects": [
      "outer-layer traces"
     ]
    },
    {
     "source": "derived",
     "analysis": "impedance",
     "key": "no_target",
     "value": "no impedance targets (netClasses / .kicad_pro)",
     "affects": [
      "every row: status no_target"
     ]
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "fab",
     "value": "jlcpcb",
     "citation": "fab profile jlcpcb (NativeCAD default)",
     "verified": true,
     "affects": []
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "ipc6012.drillPositionTolMm",
     "value": 0.075,
     "unit": "mm",
     "citation": "NativeCAD default (typical standard-technology rigid fab; no fab publishes it)",
     "verified": false,
     "affects": [
      "ipc6012"
     ]
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "ipc6012.innerRegistrationTolMm",
     "value": 0.075,
     "unit": "mm",
     "citation": "NativeCAD default (typical standard-technology rigid fab; no fab publishes it)",
     "verified": false,
     "affects": [
      "ipc6012"
     ]
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "ipc6012.outerRegistrationTolMm",
     "value": 0.05,
     "unit": "mm",
     "citation": "NativeCAD default (typical standard-technology rigid fab; no fab publishes it)",
     "verified": false,
     "affects": [
      "ipc6012"
     ]
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "ipcClass",
     "value": "2",
     "citation": "IPC-6012 Class 2 (dedicated service) - the general commercial default",
     "verified": true,
     "affects": []
    },
    {
     "source": "default",
     "analysis": "cert",
     "key": "motC",
     "value": 105,
     "citation": "requested MOT 105 C (FR-4 laminates' common UL RTI)",
     "verified": false,
     "affects": [],
     "unit": "C"
    },
    {
     "source": "default",
     "analysis": "returnPath",
     "key": "erEff",
     "value": 4,
     "citation": "effective epsilon_r 4 for the stitching distance (NativeCAD default)",
     "verified": false,
     "affects": []
    },
    {
     "source": "derived",
     "analysis": "returnPath",
     "key": "planes",
     "value": [
      "In1.Cu:GND",
      "In2.Cu:VCC"
     ],
     "citation": "inner layer with >= 30 % pour cover of one net (outer: >= 80 % and no other net's traces); voids = holes >= 2 mm^2 in that net's pours, as bounding rectangles",
     "affects": [
      "every finding"
     ]
    },
    {
     "source": "default",
     "analysis": "returnPath",
     "key": "riseTimeNs",
     "value": 1,
     "citation": "edge rise time 1 ns, f_knee = 0.35 / t_r (Johnson & Graham)",
     "verified": true,
     "affects": [],
     "unit": "ns"
    }
   ]
  },
  "refused": {
   "before": [
    {
     "analysis": "cert.creepage",
     "reasonCode": "pcb_analysis_needs_input",
     "needs": [
      "cert.pairs[].a",
      "cert.pairs[].b",
      "cert.pairs[].workingVrms"
     ],
     "remedy": "creepage needs the net pairs and the working voltage between them; UL 796 and IPC-6012 ran without them",
     "requested": false
    }
   ],
   "after": [
    {
     "analysis": "cert.creepage",
     "reasonCode": "pcb_analysis_needs_input",
     "needs": [
      "cert.pairs[].a",
      "cert.pairs[].b",
      "cert.pairs[].workingVrms"
     ],
     "remedy": "creepage needs the net pairs and the working voltage between them; UL 796 and IPC-6012 ran without them",
     "requested": false
    }
   ]
  }
 }
}