CISPR 25:2021 is the technical reference for vehicles, boats and internal combustion engines where radio disturbance characteristics must be evaluated to protect on-board receivers. It addresses both limits and methods of measurement, making it relevant for engineering teams, test laboratories, and compliance reviews that need a documented basis for electromagnetic compatibility assessment. In practical workflows, it supports technical review, verification activities, and product evaluation where interference control is part of the design or procurement decision.

Purpose of CISPR 25:2021

The purpose of CISPR 25:2021 is to define how radio disturbance performance is measured and assessed for electrical and electronic systems used in vehicles, boats, and internal combustion engine applications. It is commonly used as a compliance reference when evaluating whether equipment may affect on-board receivers and related radio services. For engineering documentation, it helps align test planning, conformity assessment, and risk management around a consistent method for emission-related evaluation.

Compliance applications of CISPR 25:2021

CISPR 25:2021 is often used in laboratory evaluation, supplier qualification, and technical validation for components and systems intended for mobile platforms. It can support testing workflows for vehicle electronics, marine equipment, and engine-related installations where radio disturbance control is important. Organizations may use it when preparing evidence for regulatory preparation, comparing candidate designs, or confirming that a product meets defined emission requirements within a controlled test environment.

Benefits of CISPR 25:2021

Using CISPR 25:2021 helps create more consistent testing practices and clearer expectations for technical compliance. That can reduce rework during development, improve interoperability with on-board receivers, and strengthen quality workflows across engineering, procurement, and conformity assessment activities. It also provides a structured basis for documented evaluation, which is valuable when teams need to demonstrate that design choices, test results, and acceptance criteria have been reviewed against a recognized EMC document.

• Limits and measurement methods for radio disturbance evaluation in mobile and engine-related equipment
• Support for protection of on-board receivers in vehicles, boats, and internal combustion engine applications
• Useful for laboratory testing, design verification, and compliance evidence gathering
• Helps standardize technical assessment and reduce variation across testing workflows