{"sections":[{"heading":"Start with the supported representation","paragraphs":["The current source reference lists LOSSLESS, LCLADDER, RLGC, WIDEBAND and MODAL line models, and an @MTL model with explicit constant RLGC matrices and a reference conductor.","These interfaces have distinct parameter, passivity and analysis constraints. For example, constant scalar RLGC is not a geometric field solver or a general frequency-dependent coupled-network import."]},{"heading":"Do not assume a file conversion exists","paragraphs":["An older support discussion about arbitrary S-parameter black boxes does not prove a current import feature. The documented explicit line models likewise do not establish that an arbitrary Touchstone file can be loaded directly.","Before promising an InductEx-to-JoSIM handoff, identify the exact model, supported data form, frequency range and reference convention. Validate any fitting or reduction method separately."]}],"canonical_url":"https://www.sun-magnetics.com/knowledge-base/josim-transmission-models","url":"/knowledge-base/josim-transmission-models","known_issues":[],"search_record":{"execution":false,"relatedProducts":[],"version_tags":["JoSIM-Pro 2.9 target"],"text":"Choose a transmission-line model before importing external network data The maintained syntax documents explicit line models with different assumptions. Match the physical model and data format before planning a simulator handoff. JoSIM-Pro 2.9.0 release target; review-build/source evidence Explanation Start with the supported representation The current source reference lists LOSSLESS, LCLADDER, RLGC, WIDEBAND and MODAL line models, and an @MTL model with explicit constant RLGC matrices and a reference conductor. These interfaces have distinct parameter, passivity and analysis constraints. For example, constant scalar RLGC is not a geometric field solver or a general frequency-dependent coupled-network import.  Do not assume a file conversion exists An older support discussion about arbitrary S-parameter black boxes does not prove a current import feature. The documented explicit line models likewise do not establish that an arbitrary Touchstone file can be loaded directly. Before promising an InductEx-to-JoSIM handoff, identify the exact model, supported data form, frequency range and reference convention. Validate any fitting or reduction method separately. ","id":"josim-transmission-models","keywords":"","kind":"Explanation","title":"Choose a transmission-line model before importing external network data","product":"JoSIM-Pro"},"version":"2.9.0 release target; review-build/source evidence","id":"josim-transmission-models","related":["/knowledge-base/josim-variable-step-lines"],"downloads":[],"publication_status":"published","numerical_output":null,"provenance":{"execution_checks":[],"figure_evidence":[],"review_notes":["Arbitrary external-network import and any conversion workflow need explicit current capability evidence and a worked example.","Support history informed this draft. Current-source guidance has been checked; a fresh walkthrough on the intended distributed release and product-owner review remain pending."],"scope":"Recorded inputs/builds only. Complete walkthrough and final-package acceptance remain separate.","verification_requirements":{"gui_method":"not-required-for-this-answer","status":"review-incomplete","illustrations":"not-required-for-this-answer","required":["technical-review","release-applicability"],"legacy_walkthrough_field":"pending retained; not evidence of a complete scenario"},"sources":[{"id":"support:SUP-016","section":"Generalised editorial finding; outcome qualification retained"},{"id":"josim-pro:docs/manual_source/sections/syntax.tex","section":"Transmission-line model reference and limitations"},{"id":"owner:technical-review-20261102","section":"JoSIM-Pro 2.9 chosen as the public starting path; release availability must be checked before publication"}]},"title":"Choose a transmission-line model before importing external network data","type":"Explanation","markdown_url":"/_functions/kbResource?path=markdown%2Fjosim-transmission-models.md","summary":"The maintained syntax documents explicit line models with different assumptions. Match the physical model and data format before planning a simulator handoff.","product":"JoSIM-Pro"}