ETSI EN 301 908-1 IMT Cellular Network Testing

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Regarded as a leader in wireless testing, Keystone Compliance assists companies in RF testing daily. Our RF testing lab and wireless test engineers work with clients to quickly develop appropriate and concise test plans. Keystone’s radio testing engineers streamline the process and assist companies to achieve the compliance they require. Lastly, we take pride in providing the peace of mind that all of your wireless testing needs will be met. 

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Summary of ETSI EN 301 908 Wireless Performance Testing

ETSI EN 301 908 applies to user equipment, repeaters, and base stations for IMT. This equipment must fall within the scope of one of the other parts of ETSI EN 301 908-1. There are three pieces of information needed when carrying out this electromagnetic compliance standard.

1. This intentional radiator testing standard contains particular requirements for radiated spurious emissions. It also contains requirements for control and monitoring functions. These are considered applicable to IMT-2000 FDMA/TDMA equipment.
2. The RF compliance standard specifies technical requirements in respect to a particular type of IMT equipment.
3. This document applies to equipment designed to meet any version of the ETSI EN 301 908 specifications. These are referenced in the recommendations of ITU-R M.1457-12 and M.2012-1

The testing of wireless devices demonstrates how radio equipment effectively uses and supports the efficient use of the radio spectrum. These intentional radiator specifications help avoid harmful interference.

Scope of RF Device Testing

Whenever possible, the wireless product test site should be a fully anechoic chamber simulating the free-space conditions. The equipment under testing is placed on non-conducting support. The mean power of any spurious components is detected.

At each frequency at which a component is detected, the equipment under testing (EUT) is rotated. The component is rotated to obtain a maximum response. The Effective Radiated Power (ERP) of that component is determined by a substitution measurement.

Radiated emission RF lab testing assesses the ability of radio communication equipment to limit unwanted emissions from the enclosure port. Radiated emissions testing is also applicable to radio communications ancillary equipment.

Environmental profile – the technical requirements of this document apply under the environmental profile for the operation of the equipment. These requirements are to be stated by the manufacturer.

The wireless regulatory compliance equipment should comply with all the technical requirements of the present document at all times. The equipment will also comply when operating within the boundary limits of the operational profile.

Conformance requirements – The requirements within this document are based on the assumption that the operating band is shared between systems of the IMT family or systems having compatible characteristics.

For base stations capable of multi-band operations, the requirements in the document apply for each supported operating band unless otherwise stated. For emission tests, all operating bands should be activated according to the applicable test configuration.

ETSI EN 301 908 Wireless Technologies Testing Conditions

This clause defines the configurations for emission tests as follows:

• The equipment shall be tested under normal test conditions.
• The test configuration shall be as close to the normal intended use as possible.
• If the equipment is part of a system it is acceptable to test the equipment while connected to the minimum configuration of ancillary equipment necessary to exercise the ports.
• If the equipment has a large number of ports, then a sufficient number is selected to simulate actual operating conditions. This also ensures that all the different types of termination are tested.
• The test conditions, configuration, and mode of operation are recorded in the test report.

Keystone Compliance Offers Expert Wireless Device Testing Capabilities

Our team strives to give our customers more time and energy on product development instead of testing. Keystone Compliance can accommodate fixed, mobile and portable devices of all sizes. In addition to wireless telecom testing, Keystone has a full scope of expertise including multiple transmitters, simultaneous transmitters, and pre-approved radio modules.

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