IEC 61196-1-112:2025

Overview

IEC 61196-1-112:2025 is an International Electrotechnical Commission (IEC) standard that defines electrical test methods for coaxial communication cables. Specifically, it specifies procedures for determining return loss (RL) and voltage standing wave ratio (VSWR), which are crucial parameters for assessing the performance of coaxial cables in communication systems. This second edition updates and supersedes the previous 2006 version, featuring technical revisions and additional content to address developments in cable testing technology.

Compliance with IEC 61196-1-112 ensures reliable and standardized methods for evaluating coaxial cables, providing confidence to manufacturers, test laboratories, and end users in data transmission and RF communication applications.

Key Topics

IEC 61196-1-112:2025 covers several essential aspects for testing coaxial communication cables:

• Return Loss (RL): Defines the test methods to measure the ratio of reflected to incident power, an indicator of how well the cable matches its load and minimizes signal reflection.
• Voltage Standing Wave Ratio (VSWR): Describes the method to determine the ratio of maximum to minimum voltage in a standing wave pattern, reflecting the efficiency of signal transmission.
• Test Equipment: Specifies requirements for vector network analyzers (VNA) and calibration standards (open, short, load) necessary for accurate measurement.
• Test Sample Preparation: Outlines the proper preparation of cable samples, including length and connector requirements, to achieve reliable and consistent test results.
• Measurement Points and Frequency Spacing: Details how to select the correct number of measuring points and frequency intervals, ensuring narrowband phenomena such as resonance peaks are accurately identified.
• Detailed Test Procedures: Provides step-by-step protocols for both one-port and two-port measurements using VNA, including calibration and data recording.
• Reporting and Specification: Lists information to be documented in test reports and relevant standards, supporting traceability and repeatability.

Applications

The standard is relevant to a wide range of professionals and industries:

• Coaxial Cable Manufacturers: Standardizes quality assurance procedures, helping ensure product conformity with global market requirements.
• Testing Laboratories: Provides definitive procedures and criteria for cable certification, enhancing accuracy and comparability of test results.
• Telecommunications Providers: Ensures installed coaxial cables deliver reliable data transmission with minimal signal loss and reflection, critical in broadcasting, data centers, and RF systems.
• Network Equipment OEMs & Integrators: Supports the validation and integration of cables in complex communication networks, reducing field failures due to impedance mismatch or signal reflection.
• Standards and Compliance Auditors: Reference for evaluating adherence to industry best practices in cable performance testing.
• R&D in RF and Microwave Systems: Facilitates comparative studies and development of high-frequency coaxial components.

Related Standards

For comprehensive quality management and testing of coaxial cables, the following IEC standards are often referenced alongside IEC 61196-1-112:

• IEC 61196-1: Coaxial communication cables – Generic specification – General, definitions, and requirements.
• IEC 61196 series: Various parts addressing mechanical, electrical, and environmental test methods for coaxial cables.
• IEC 60096 series: Radio-frequency cables – part specifications and test methods.
• Other RF Measurement Standards: Such as IEC 60050-131 (International Electrotechnical Vocabulary) for terminology.

Practical Value

Implementing IEC 61196-1-112:2025 in cable testing and certification assures:

• Reliable cable performance in high-frequency and broadband communication systems
• Reduction in transmission errors and system downtime through accurate reflection and loss measurements
• Consistent test reporting across the industry, supporting supplier and user confidence
• Future-proofing product development and deployment by aligning with state-of-the-art international requirements