ETSI EN 300 440 EMC Short Range Device Testing
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Summary of ETSI EN 300 440 RF Device Testing
EMC compliance testing standard 330 440 applies to the following short-range device major equipment types:
- Generic short-range devices. This includes alarms, telecommand, telemetry, data transmission in general, etc.
- Radiofrequency identification.
- Radiodetermination, including detection, movement, and alert applications.
These radio equipment types are capable of operating in the permitted frequency bands within the 1GHz to 40 GHz range.
- Either with a radio frequency output connection and dedicated antenna or with an integral antenna.
- For all types of modulation.
- With or without speech.
Lastly, this RF compliance document covers fixed, mobile and portable stations. Applications using Ultra Wide Band (UWB) technology are not covered by this specification. However, the document does not require measurements for radiated emissions below 25 MHz.
Conditions of Testing Wireless Devices
For the purpose of this test, the receiver must produce an appropriate output under normal conditions indicated below:
- An SND/ND ratio of 20 dB. This is measured at the receiver output. The output is measured through a telephone psychometric weighting network; or
- After demodulation, a data signal with a bit error ratio of 10-2 without correction; or
- After demodulation, a message acceptance ratio of 80%.
- An appropriate false alarm rate or sensing criteria.
Where the indicated performance cannot be achieved, the performance criteria used to determine the performance of the receiver will be published by the manufacturer.
When appropriate, testing is carried out on suitable frequencies for the equipment concerned. If the equipment is designed to operate with different carrier powers, measurements of each transmitter are taken.
ETSI EN 300 440 Electromagnetic Compliance Conditions
Before measurements are made, equipment must reach thermal balance in the test chamber. In the case of equipment containing temperature stabilization circuits, the temperature is switched on 15 minutes after thermal balance is obtained.
If the provider states that the equipment is designed for continuous operation, the following procedure must be followed:
- Before the testing at the upper extreme temperature, the equipment is placed in the test chamber until the thermal balance is reached.
- For tests at lower extreme temperatures, the equipment is left in the thermal chamber until the thermal balance is reached. Then, it is switched on for one minute after which the equipment meets the specified requirements.
If the provider states that the equipment is designed for intermittent operation, the test procedure is carried out as follows:
- Before tests at the upper extreme temperature, the equipment is placed in the test chamber. The equipment is left until the thermal balance is reached. Then, the equipment is transmitted on and off for a period of five or four minutes. This ultimately depends on the provider’s declared duty cycle.
- For tests at lower extreme temperatures, the equipment is left in the chamber until the thermal balance is attained. The equipment is switched to standby or receive condition for one minute.
Expert EMC Wireless Regulatory Compliance Testing Services
In addition to ETSI EN 300 440, Keystone’s RF lab has a full scope of expertise including simultaneous transmitters, licensed exempt radios, and licensed radios. Keystone Compliance can accommodate fixed, mobile and portable devices of all sizes. Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling.