Public evidence

electrical.rf.coax

Machine-checked verification for calculation version 1.0.1 · tier internally_reviewed

Open calculator API Capability Download JSON CVP Manifest MCP Review policy

CVP status

Ideal TEM coaxial transmission line; homogeneous dielectric; lossless/low-loss; non-magnetic (μr≈1). Omitted εr defaults to 1.0 (air/vacuum approximation). Does not model conductor loss, dielectric loss/tanδ, dispersion, connectors, or higher-order modes.

Declared partition coverage: PASS · 2/2 declared partitions (z0, invalid-domain)
Versions: Calculation 1.0.1 · CVP protocol 1.0.0-proposed
CVP identity: 8/8 property · digest 346864640c3a

Verification

Legacy regression suite: 21/21 calculation tests · Production surface contract 6/6

Three distinct suites: educational examples on the calculator page, this legacy regression count (21/21 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 1.0.1 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Calculation version 1.0.1. CVP 1.0.0-proposed. 4/4 golden · 9/9 CVP boundary · 18/18 invalid · 8/8 property · 2/2 metamorphic · 3/3 cross-interface · 4/4 CVP contract. digest 346864640c3a.

Golden (oracle-backed) 4 / 4
CVP boundary 9 / 9
Invalid input 18 / 18
Property 8 / 8
Metamorphic 2 / 2
Cross-interface 3 / 3
CVP contract 4 / 4
Interfaces PASS · UI (SSR) / REST / MCP
Interface claim ui-ssr is query-result HTML, not a live browser session. Error-path engine·REST·MCP 1/1 (status, code, calculation_version). SSR compared on URL-canonical requested calculations; empty query is idle (not an error) and JSON-typed object/array inputs are REST/MCP-only.
Assurance Engineering

release artifacts aligned PASS
schema output required declared PASS
schema valid input executes PASS
engine success output validates schema PASS
schema rejects incomplete input PASS
rest success payload validates schema PASS

Fingerprint sha256:ce06ee92346ecfb20b7e53849a9e35d64f76c0e3e3b0681c6c7991e592ce187e

Input schema sha256:238096127bce9b927422b6f723d34b14a1361ca5931027a5ca9c3d366706b204 · Output schema sha256:8402a00ce0ce19cd0a0fd73b6cc066e2d8b452a2340ac3a5ab8bd1c443b561d0 · 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: coax-impedance
Engine: coax-impedance
Engine build: 2026-09-12
Evidence core: 2026-09-12T13:22:04.137Z
Rendered: 2026-11-10T05:18:41.907Z
Last reviewed: 2026-09-12

Assumptions

Ideal TEM coaxial transmission line
Homogeneous dielectric
Lossless / low-loss approximation
Non-magnetic dielectric, μr ≈ 1
Omitted εr defaults to 1.0 (air/vacuum approximation)

Limitations

Does not model conductor loss
Does not model dielectric loss / tanδ
Does not model dispersion
Does not model connectors or discontinuities
Does not model higher-order modes

Sources

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

David M. Pozar, Microwave Engineering — 4th ed., Ch. 2 Transmission Line Theory — coaxial line · 2012
Supports: Ideal TEM coax Z0 = (η0/(2π√εr)) ln(D/d) with μr≈1
Robert E. Collin, Foundations for Microwave Engineering — 2nd ed., coaxial transmission line · 2001
Supports: Z0 ∝ ln(D/d)/√εr for homogeneous non-magnetic dielectric

Verification disclosure

Aggregate outcomes, scope and artifact commitments are public. Complete test inputs, expected values, execution records and oracle infrastructure are retained privately. This summary does not independently reproduce the full verification run.