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Public evidence

electrical.rf.link_budget

Machine-checked verification for calculation version 1.1.1 · tier expert_verified

Open calculator API Capability Download JSON CVP Manifest MCP Review policy

CVP: CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance· Free-space path; u_* GUM deferred from this CVP wave · Protocol · Schema · Production report

Declared partition coverage
PASS · 3/3 declared partitions (isotropic, with-gains, invalid-domain)
Versions
Calculation 1.1.1 · CVP protocol 1.0.0-proposed · Evidence 2026-09-11.schema-coverage-u
Verification revision
2026-09-11.schema-coverage-u · 5/5 property · digest da256fa94e72

Verification

Legacy regression suite: 12/12 calculation tests · Production surface contract 6/6

Three distinct suites: educational examples on the calculator page, this legacy regression count (12/12 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

    This calculator CURRENT · Public schema 1.1.1 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Verification revision 2026-09-11.schema-coverage-u. Calculation version 1.1.1. CVP 1.0.0-proposed. 2/2 golden · 5/5 CVP boundary · 3/3 invalid · 5/5 property · 1/1 cross-interface · 6/6 CVP contract. digest da256fa94e72.

  • Golden (oracle-backed) 2 / 2
  • CVP boundary 5 / 5
  • Invalid input 3 / 3
  • Property 5 / 5
  • Cross-interface 1 / 1
  • CVP contract 6 / 6
  • Interfaces PASS · UI (SSR) / REST / MCP
  • Interface claim ui-ssr is query-result HTML, not a live browser session.
  • Assurance Engineering
  • release artifacts aligned PASS
  • schema valid input executes PASS
  • engine success output validates schema PASS
  • schema rejects incomplete input PASS
  • schema coverage requires u PASS
  • schema rejects boundary unc k without u PASS

Fingerprint sha256:5ab8b3cfa8e85218e586a4b892e3ea5916b53439b95caecc6243104101bb3f9b

Input schema sha256:d4f87ff5a30d278b278738952b8cf80685f3f4ee5fa2a3e0f59d51ccf1cccdcc · Output schema sha256:a641d8b98b7cca0f17a0f66b45ece3c39aebf00d149567eea2ad7aa981c2eb34 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool
rf-link-budget
Engine
rf-link-budget
Engine build
2026-09-12
Evidence core
2026-09-12T08:32:37.705Z
Rendered
2026-09-16T22:03:43.720Z
Last reviewed
2026-08-10

Assumptions

  • Ideal free space; isotropic FSPL reference
  • When u_* are set, first-order GUM sensitivity with independent inputs (no ρ on this page)

Limitations

  • Ideal free space only
  • Extends electrical.rf.fspl
  • Optional u_* use GUM sensitivity on Pr only (no MC/ρ/νeff UI); empty u_* preserves 1.0.0 fields

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Legacy published checks

Golden and boundary cases from the legacy Evidence JSON. CVP property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the Manifest — including SKIP when a suite has no vectors.

IDKindStatusDetail
1km-2g4goldenpassExpected fspl_dB=100.05200805611548 · Pr_dBm=-80.05200805611548 · margin_dB=9.947991943884517 · Actual fspl_dB=100.05200805611548 · path_loss_dB=100.05200805611548 · Pr_dBm=-80.05200805611548 · margin_dB=9.947991943884517 · wavelength_m=0.12491352416666666 · d_m=1000 · f_Hz=2400000000 · Pt_dBm=20
with-gainsgoldenpassExpected path_loss_dB=88.05200805611548 · Actual fspl_dB=100.05200805611548 · path_loss_dB=88.05200805611548 · Pr_dBm=-68.05200805611548 · margin_dB=21.947991943884517 · wavelength_m=0.12491352416666666 · d_m=1000 · f_Hz=2400000000 · Pt_dBm=20
missing-PtboundarypassExpected MISSING_REQUIRED_INPUT · Actual MISSING_REQUIRED_INPUT
neg-LboundarypassExpected VALUE_MUST_BE_NON_NEGATIVE · Actual VALUE_MUST_BE_NON_NEGATIVE
boundary-linkboundarypassExpected Pr_dBm=-80.05200805611548 · margin_dB=9.947991943884517 · Actual fspl_dB=100.05200805611548 · path_loss_dB=100.05200805611548 · Pr_dBm=-80.05200805611548 · margin_dB=9.947991943884517 · wavelength_m=0.12491352416666666 · d_m=1000 · f_Hz=2400000000 · Pt_dBm=20
boundary-unc-Pt-dboundarypassExpected Pr_dBm=-80.05200805611548 · Actual fspl_dB=100.05200805611548 · path_loss_dB=100.05200805611548 · Pr_dBm=-80.05200805611548 · margin_dB=9.947991943884517 · wavelength_m=0.12491352416666666 · d_m=1000 · f_Hz=2400000000 · Pt_dBm=20
boundary-unc-k-without-uboundarypassExpected INVALID_INPUT · Actual INVALID_INPUT
property-prpropertypassPr
property-gainspropertypass+6 dB gains
property-distpropertypass2d → +6.02 dB
property-uncertainty-composepropertypassu_* → sensitivity U=k·u_c on Pr
property-no-unc-omitpropertypassno u_* → no uncertainty object