What is the EN 300 328 Testing Standard

Introduction to the EN 300 328 Standard

ETSI EN 300 328 is a European harmonized standard for 2.4 GHz wideband transmission systems, used to demonstrate that equipment complies with the requirements of the Radio Equipment Directive (RED 2014/53/EU) regarding "the effective use of the radio spectrum to avoid harmful interference."

Typical applicable technologies include:

• Wi-Fi (2.4 GHz: 802.11 b/g/n/ax)

• Bluetooth Classic / BLE

• Zigbee, Thread, 2.4 GHz proprietary protocols

• Other wideband data transmission equipment using DSSS / OFDM / FHSS

Supplementary Note: V2.2.2 (2019-07) has replaced V2.1.1 and is currently widely adopted in RED compliance. The main changes focus on receiver blocking, receiver categorization, and spurious emission limits in the 694–862 MHz band.

Applicable Objects and Project Scenarios

1. Applicable Products

• Wi-Fi routers, APs, and modules

• Bluetooth headphones, speakers, and wearable devices

• Zigbee / Matter / smart home gateways

• IoT sensors, wireless keyboards and mice, and cameras

• Drone remote controls and 2.4 GHz proprietary protocol terminals

EN 300 328 Testing Items

Based on ETSI EN 300 328 V2.2.2, the testing content can be summarized into the following categories:

1. Transmitter RF Performance

• RF Output Power (Conducted Power / EIRP / TRP)

• Occupied Bandwidth

• Power Spectral Density (PSD)

• Spectrum Mask / Out-of-band Emissions

• Spurious Emissions (e.g., the limit for the 694–862 MHz band is -36 dBm/100 kHz)

2. Spectrum Access and Coexistence Mechanisms

• Duty Cycle

• Medium Utilization

• Adaptivity (Adaptivity / AFA / LBT)

• Frequency Hopping Equipment: Hopping sequence, hopping separation, accumulated transmit time

Note: Non-adaptive equipment typically needs to meet channel occupancy requirements; adaptive equipment reduces interference by detecting channel occupancy and avoiding it.

3. Receiver Performance

• Receiver Spurious Emissions

• Receiver Blocking

• Equipment supporting PER/FER: PER/FER ≤ 10%

• Equipment not supporting PER/FER: Must not lose basic wireless functions

4. EMC and System-level Verification

• Coordinate with the EN 301 489 series for EMC evaluation

• Co-verification of full-system OTA, antenna systems, and auxiliary equipment

• Anomaly recovery, function monitoring, and raw curve recording

Sample and Commissioning Requirements

1. Sample Submission Requirements

The submission should comply with the standard's "installation, power supply, ports, operation, and monitoring requirements" and include:

• Complete prototype or components

• Samples with clearly specified hardware/software versions

• Cables, antennas, adapters, and auxiliary equipment

• Normal samples / abnormal samples / comparison samples for rectification verification

• Schematics, interface descriptions, working modes, and rated parameters

Test Report Content

An ETSI EN 300 328 V2.2.2 test report typically includes:

• Actual sample information

• Applied standard versions and referenced documents

• Testing methods, test conditions, and layout configurations

• Measured data for transmission, reception, adaptivity, and spurious emissions

• Curves, spectrograms, photos, and raw records

• Abnormal phenomena and recovery status

• Basis for compliance determination

• Quality control and data review explanations

The report can support:

• CMA / CNAS logos (if permitted by laboratory qualifications)

• Chinese / English versions

• Uses such as: R&D verification, EMC evaluation, wireless compliance, rectification re-testing, and quality control.

When there are changes to the sample, batch, working conditions, or standard version, supplementary testing should be conducted according to the new conditions.

Common Report Uses

One-Sentence Summary

ETSI EN 300 328 V2.2.2 is not a "single RF test," but a comprehensive standard covering transmission performance, spectrum access, receiver anti-interference, spurious emissions, and system-level wireless compliance for 2.4 GHz wideband equipment.