Overview
IEC TS 61169-1-7:2025 is a Technical Specification for radio‑frequency connectors that defines how to report and quantify measurement uncertainty of insertion loss in frequency‑domain tests performed with vector network analyzers (VNAs). It complements the IEC 61169 series by focusing specifically on uncertainty specification for insertion loss measurements used in acceptance and type‑approval testing of RF connectors in telecommunications and electronic equipment.
Key topics
- Scope and purpose: Procedures and concepts for uncertainty reporting of insertion loss measurements on individual connector types using VNAs.
- Parameter definitions: Transmission coefficient representation T = a + jb and insertion loss formula: Insertion loss = −20 log(|T|) (dB).
- VNA calibration uncertainty: Identification of residual error terms (directivity, match, tracking, isolation) and how calibration standards and methods affect measurement uncertainty.
- Report characteristics: What to include in a connector‑type insertion loss report (frequency dependence, grades, and applicable conditions).
- Uncertainty contributors:
- Calibration residual errors (e.g., match error, directivity)
- Instrumentation sources (linearity, isolation, random errors)
- Measurement conditions (noise floor/trace noise, mating interface defects such as pin recession or scratches)
- Uncertainty evaluation: Use of ISO/IEC Guide 98‑1 principles to calculate expanded uncertainty (≈95 % confidence), and guidance on estimating VNA uncertainty from manufacturer data or higher‑level calibration laboratories.
- Informative annex: Practical method to estimate uncertainty from commercial VNA data sheets and calibration certificates.
Applications
This Technical Specification is directly useful for:
- Test and calibration laboratories preparing insertion loss reports and uncertainty budgets for RF connectors.
- Connector manufacturers performing type‑approval and production acceptance testing.
- Procurement and QA teams defining acceptance criteria tied to measured values plus uncertainty.
- R&D and design engineers who need realistic measurement uncertainty to validate connector performance.
- Certification bodies and compliance engineers assessing conformance to RF connector electrical requirements.
Practical benefits include improved comparability of insertion loss data, robust acceptance criteria that account for measurement uncertainty, and clearer requirements for VNA calibration and test setup.
Related standards
Keywords: IEC TS 61169-1-7:2025, insertion loss, VNA calibration uncertainty, radio-frequency connectors, RF connectors, frequency domain test, measurement uncertainty, acceptance testing.