Understanding EN 300 220-2 for Non-Specific Radio Equipment
Many wireless products operate using low-power radio technologies in license-exempt frequency bands. These products support a wide range of applications, including telemetry, telecommand, alarms, industrial monitoring, smart metering, and IoT communications.
Within Europe, one of the primary standards governing these products is ETSI EN 300 220-2. This harmonized standard supports compliance with the Radio Equipment Directive (RED) 2014/53/EU and establishes requirements intended to ensure efficient spectrum utilization while minimizing interference between radio systems.
Understanding EN 300 220-2 is essential for manufacturers seeking CE marking and access to European markets for sub-GHz wireless products.
What Is EN 300 220-2?
ETSI EN 300 220-2 is a harmonized European standard that specifies radio requirements for non-specific Short Range Devices (SRDs) operating between 25 MHz and 1,000 MHz.
The standard applies to a broad range of wireless products, including:
- Telemetry systems
- Telecommand devices
- Alarm systems
- Industrial control equipment
- Smart metering systems
- Environmental monitoring devices
- Asset tracking solutions
- Building automation systems
- Proprietary data transmission devices
- Certain LoRa and LPWAN products
EN 300 220-2 generally applies to equipment operating with power levels up to 500 mW e.r.p. (effective radiated power).
The purpose of the standard is to ensure that radio equipment makes efficient use of spectrum resources while enabling reliable operation within shared frequency bands.
Common Frequency Bands Used Under EN 300 220
The standard covers operation across numerous license-exempt frequency bands commonly used throughout Europe.
Some of the most frequently used bands include:
| Frequency Band | Typical Applications |
| 169 MHz | Utility metering and industrial systems |
| 433 MHz | Remote controls, alarms, telemetry |
| 868 MHz | IoT, LPWAN, industrial monitoring |
| Various Sub-GHz Bands | Proprietary wireless systems |
The 868 MHz band remains one of the most widely deployed frequencies for European IoT applications due to its favorable propagation characteristics and established regulatory framework.
What’s New in EN 300 220-2 V3.3.1?
Version 3.3.1 introduces updates intended to improve spectrum efficiency and harmonize compliance requirements across modern wireless technologies.
Notable areas of focus include:
- Increased emphasis on receiver performance requirements
- Clarification of spectrum access mechanisms
- Updated requirements for polite spectrum access technologies
- Inclusion of certain analogue voice transmitting devices that were previously outside the scope of the standard
- Improved alignment with current European spectrum regulations
Manufacturers updating existing certifications should review the latest version carefully to determine whether additional evaluations may be required.
Power Limits and ERP Requirements
One of the key compliance considerations under EN 300 220-2 is transmitter power.
The standard establishes requirements for:
- Effective Radiated Power (ERP)
- Maximum ERP Power Spectral Density
- Occupied bandwidth
- Frequency stability
Applicable limits vary depending on the operating frequency band and device category.
When evaluating compliance, antenna characteristics must also be considered since antenna gain can significantly affect final radiated power calculations.
Spectrum Access Requirements
Because many devices share the same license-exempt frequency bands, EN 300 220-2 includes requirements intended to promote fair and efficient spectrum usage.
The standard may utilize several spectrum access mechanisms depending on the equipment type and operating mode.
Duty Cycle
Duty cycle limits restrict the amount of time a transmitter may occupy a channel.
For example:
- A 1% duty cycle permits transmission for 36 seconds per hour
- A 10% duty cycle permits transmission for six minutes per hour
Duty cycle limitations help reduce congestion and improve coexistence among devices operating in shared spectrum.
Clear Channel Assessment (CCA)
CCA mechanisms require a device to evaluate channel occupancy before transmitting.
This helps reduce the probability of interference with other nearby radio systems.
Listen Before Talk (LBT)
LBT systems monitor the channel before initiating transmissions.
If the channel is occupied, the device delays transmission until the channel becomes available.
Adaptive Frequency Agility (AFA)
AFA mechanisms allow equipment to identify and utilize alternative frequencies when interference is detected.
Together, these techniques are commonly referred to as polite spectrum access mechanisms and play an increasingly important role in modern wireless system design.
EN 300 220-2 Test Requirements
A typical compliance evaluation may include testing for:
| Effective Radiated Power (ERP) |
| Verification that transmitted power remains within applicable limits. |
| ERP Power Spectral Density |
| Assessment of transmitted power distribution across the occupied bandwidth. |
| Occupied Bandwidth |
| Measurement of the frequency range occupied by the transmitted signal. |
| Frequency Stability |
| Verification that operating frequencies remain within acceptable tolerances under varying environmental conditions. |
| Transmitter Out-of-Band Emissions |
| Evaluation of emissions occurring outside the assigned operating channel. |
| Unwanted Emissions in the Spurious Domain |
| Assessment of emissions that could affect other radio services operating outside the intended frequency band. |
| Duty Cycle Verification |
| Confirmation that devices comply with applicable transmission timing restrictions. |
| Clear Channel Assessment Performance |
| Evaluation of channel sensing mechanisms where required. |
| Spectrum Access Timing Parameters |
| Verification of timing requirements associated with polite spectrum access techniques. |
| Transient Power Behavior |
| Assessment of transmitter performance during start-up and operational transitions. |
| Receiver Performance Requirements |
| Receiver performance has become an increasingly important aspect of regulatory compliance. |
In addition to transmitter evaluations, manufacturers may be required to demonstrate that receivers can operate effectively within shared spectrum environments.
Receiver-related assessments may include:
- Receiver blocking
- Adjacent channel selectivity
- Receiver robustness
- Immunity to nearby transmissions
Strong receiver performance contributes to overall spectrum efficiency and helps reduce the likelihood of interference-related issues.
Common EN 300 220 Compliance Challenges
Manufacturers frequently encounter difficulties in several areas.
| Incorrect ERP Calculations |
| Antenna gain and cable losses are often overlooked during compliance planning. |
| Duty Cycle Violations |
| Firmware configurations may unintentionally exceed permitted transmission durations. |
| Spectrum Access Implementation Issues |
| Improper implementation of CCA, LBT, or AFA mechanisms can result in compliance failures. |
| Spurious Emissions |
| Insufficient filtering may lead to unwanted emissions outside permitted frequency ranges. |
| Receiver Performance Deficiencies |
| Products designed primarily around transmitter requirements may experience difficulties meeting receiver-related evaluations. |
| Regional Configuration Errors |
| Devices configured for non-European frequency plans may require modifications before testing. |
EN 300 220 vs FCC Part 15.231
Manufacturers often compare EN 300 220 with FCC Part 15.231 because both standards govern low-power wireless devices.
However, important differences exist in:
- Frequency allocations
- Power limits
- Spectrum access requirements
- Duty cycle restrictions
- Certification procedures
- Regulatory frameworks
Products intended for both North American and European markets should be evaluated against the requirements of each region separately.
How MiCOM Labs Supports EN 300 220 Compliance
MiCOM Labs provides testing and certification support for manufacturers developing sub-GHz wireless products for European markets.
Our services include:
- EN 300 220 testing
- RED compliance evaluations
- RF pre-compliance testing
- Technical documentation review
- Global market access support
By identifying compliance challenges early in the development process, manufacturers can reduce risk, minimize redesign efforts, and accelerate certification timelines.
Conclusion
ETSI EN 300 220-2 establishes the technical framework for non-specific Short Range Devices operating between 25 MHz and 1,000 MHz within Europe. The standard addresses transmitter performance, receiver performance, spectrum access mechanisms, and efficient use of shared radio spectrum.
Manufacturers developing telemetry systems, industrial controls, IoT products, and other sub-GHz wireless devices should understand EN 300 220-2 requirements early in the design cycle to improve certification success and streamline access to European markets.