Understand what changed from ETSI EN 300 328 V2.1.1 to ETSI EN 300 328 V2.2.2

Understand what changed from ETSI EN 300 328 V2.1.1 to ETSI EN 300 328 V2.2.2


Products evaluated under any version prior to V2.2.2 require additional measurements to meet the essential requirements of the Radio Equipment Directive, as per Article 3.2.


The Internet of Things (IoT) transformation is not an abstract of the future possibilities, but rather, a reality with billions of devices deployed each year. Considering many of those products incorporate a 2.4GHz radio and share the same spectrum, it’s surprising our devices connect and communicate.

While interference is conceivable due to the staggering number of products globally employing 2.4GHz radios, regulatory compliance testing aims to help reduce the risk of safety and push a product's performance boundaries. For example, the European Union published EN 300 328 V2.2.2 on February 6, 2020. This update revised receiver blocking requirements in an effort to improve resilience to blocking for devices for uses which have the greatest risk of suffering interference from future deployments, such as LTE in the adjacent bands.


As of August 6, 2021, products placed on the market must meet the requirements of the latest version ETSI EN 300 328 V2.2.2.


Products are not automatically grandfathered to the new version. As previously mentioned, the transition period for ETSI EN 300 328 V2.1.1 ended August 6, 2021. After this date, EN 300 328 V2.1.1 was withdrawn from the official journal (OJ), which effectively ended presumption of conformity for devices in which this standard applies. Currently, EN 300 328 V2.2.2 is the only harmonized standard available for demonstrating compliance.

However, revisions that contained V2.2.2 do not require a complete retest. As many requirements remain unaffected, only limited testing would be needed to show presumption of conformity.

WHAT CHANGED FROM ETSI EN 300 328 V2.1.1 TO ETSI EN 300 328 V2.2.2


Section Title

Significant Changes

Receiver Category

Section 4.2.3 redefines receiver categories to address all combinations of equipment types and power levels.

Transmitter Unwanted Emissions in the Spurious Domain – Limits

In sections and for transmitter unwanted emissions in the spurious domain, the limits in the frequency range 694 – 862 MHz have been revised to -36 dBm. These limits are less stringent, align with CEPT ERC Recommendation 74-01, and are based on the transition from analog to digital television and the resulting spectrum allocation.

Receiver Blocking Limits

In sections and for receiver blocking limits, receiver blocking parameters have been redefined for all receiver categories. Although the blocking signal power level has increased, the wanted signal power from the companion device has also been revised. Based on receiver performance and characteristics, this change may not result in more stringent requirements when compared to V2.1.1. However, conformance with the requirements of V2.2.2 must be evaluated.

Receiver Blocking Test Method

The test method for receiver blocking in section has been revised to correspond to the changes in receiver blocking limits and parameters. Additional and revised measurement methods have been applied, including extended steps to address non-compliances.



Section Title

Notable Changes

Presentation of Equipment

Sections 2.2 and 5.3.4 include reference to ETSI EG 203 367 Guide to the application of harmonized standards covering articles 3.1b and 3.2 of the Directive 2014/53/EU (RED) for multi-radio and combined radio and non-radio equipment. Existing content has been removed where addressed by the preceding standard.

Antenna Types

Section 4.2.4 (antenna types) is a new addition and specifies that dedicated antennas are to be assessed in combination with equipment against the requirements.

Receiver Blocking
Performance Data

In sections and for receiver blocking performance criteria, reference to Frame Error Rate (FER) has been included and the option for the manufacturer to declare alternative performance criteria was removed. However, "for equipment that does not support a PER or a FER test to be performed, the minimum performance criterion shall be no loss of the wireless transmission function needed for the intended use of the equipment.”

Conducted Measurements

In section for the test method for RF Output Power, a requirement for a fast power sensor with minimum sensitivity of

-40 dBm has been added.

Power Spectral Density – Conducted Measurements

In section for power density test methods Option 1 (equipment with continuous and non-continuous transmissions), step 1 now requires the use of maximum TX-sequence time in place of channel occupancy time in the formula for determining sweep time for non-adaptive, non-continuous transmission equipment.

Also, revised for Option 2 (for equipment with continuous transmission capability) in section, step 1 for determining the frequency span was revised from 2x nominal bandwidth to "at least 2× Occupied Channel Bandwidth”.

Accumulated Transmit Time, Frequency Occupation and Hopping Sequence –
Conducted Measurements

In section for Accumulated Transmit Time, Frequency Occupation and Hopping Sequence, the test method has been revised in step 6 to indicate the use of a peak detector instead of RMS. In addition, the number of sweep points is now defined as ~ 400/Occupied Channel Bandwidth (MHz). The number of sweep points may need to be further increased in case of overlapping channels.

Transmitter Unwanted Emissions in the Out-of-Band Domain

In section for transmitter unwanted emissions in the out-of-band domain, the test method was revised to specify the measurement mode as Time Domain Power, as well as revising sweep mode from continuous to single. The maximum number of sweep points also increased to 30,000.


Bluetooth Classic + EDR, Bluetooth Low Energy (BLE), Wi-Fi, Zigbee and other wideband and frequency hopping (FHSS) data transmission equipment capable of operating in the band 2400 – 2483.5 MHz frequency band.


In most cases, a single product can be evaluated in less than one day.


If you have multiple product families, it's recommended to consider all products at once, as you can reduce costs through efficiency, specifically, setup, configuration, and programming of the device.


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