Meaning
Harmonised European standards define the technical requirements for wireless equipment operating in the five gigahertz radio frequency band to ensure efficient spectrum usage. Compliance with EN 301 893 allows manufacturers to declare conformity with European Union radio regulations for equipment operating between 5150 MHz and 5725 MHz. This standard specifies limits for transmitter power and receiver selectivity to prevent harmful interference with primary spectrum users like meteorological radars.
Coexistence Rule
Dynamic frequency selection represents a required mitigation mechanism mandated for devices operating in these shared frequencies. Certification under EN 301 893 requires that a transmitter detects radar signals above a specified threshold and vacates the channel within a set period. This mechanism prevents consumer wireless networks from disrupting emergency and meteorological infrastructure.
Mitigation Technique
Transmitter power control dynamically reduces the output power of wireless access points depending on channel conditions. Testing procedures under EN 301 893 verify that the device can reduce its average transmission power by at least three decibels below the maximum permitted level. This reduction minimizes the overall noise floor in dense environments, which increases the capacity of neighboring networks.
Conformity Verification
Laboratory testing must be conducted using specialized signal generators that simulate the specific radar burst patterns defined by the standard. The device under test must demonstrate a high probability of detection across different pulse widths and repetition frequencies to pass the compliance audit. Obtaining a test report from an accredited laboratory constitutes the primary basis for the declaration of conformity before a product is placed on the European market.
If the hardware configuration or the firmware is modified after the initial test, the manufacturer must assess whether supplementary evaluation is required to maintain compliance.
