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ETSI EN 300 386 EMC Testing of Telecommunications Network Equipment

ETSI EN 300 386 covers requirements for non-radio equipment intended to be used within a public telecommunications network. As a leader in electromagnetic compatibility, EMC, compliance testing, Keystone Compliance assists electronic equipment manufacturers with EMC testing. Meeting the IEC, EN, and other EMC testing requirements can be challenging. Not only do we understand the challenges, but we help guide companies through the process.

Keystone Compliance assists companies in EMC testing daily. We take pride in providing the peace of mind that all of your unintentional radiator testing needs will be met. Lastly, our accurate test reports are delivered quickly using our “four-eyes” approach. Meaning that multiple engineers and technicians review each report, ensuring that all the information required is present. 

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Summary of ETSI EN 300 386 Unintentional Radiator Device Testing

This EMC RF device testing document covers requirements for non-radio equipment intended to be used within a public telecommunications network. This provides telecommunications between network termination points. Examples include:

  • Switching equipment:
    • Local telephone exchanges
    • Remote switching concentrators
    • International switches
  • Non-radio transmission equipment and ancillary equipment:
    • Multiplexers
    • Line equipment and repeaters
  • Power supply equipment. Such equipment includes:
    • central power plant
    • end of suite power supplies
    • uninterruptible power supplies
    • stabilized AC power supplies
    • other dedicated telecommunication network power supplies
  • Supervisory equipment:
    • Network management equipment
    • Operator access maintenance equipment
    • Traffic measurement systems
    • Line test units
    • Functional test units

The function of supervision is either performed by independent equipment or form part of other telecommunication network equipment. If the function of supervision forms part of network equipment, the performance test is evaluated simultaneously with other functions.

This ETSI EN 300 386 document requires EMC tests to ensure a fair level of immunity for equipment under test. However, the levels do not cover extreme cases. These cases may occur at any location but with a low probability of occurrence.

Telecommunications network: This term can be defined as a network operated under a license granted by a national telecommunications authority. Provides telecommunications between Network Termination Points (NTPs) (i.e. excluding terminal equipment beyond the NTPs)

Scope of ETSI EN 300 386 Electromagnetic Compliance

Conducted immunity tests are applied one port at a time. The immunity test is not applied to the signal ports that are not permanently connected.

General-purpose equipment is covered by the scope of other standards.

ETSI EN 300 386 immunity testing conducts multiple different test methods. These methods include:

  • Electrostatic discharge: ESD applies only to points and surfaces of the EUT that are expected to be touched during normal operation.
  • Electrical fast transients/bursts: The immunity test and laboratory conditions are described in EN 61000-4-4, heavy industrial environments.
  • Surges: This applies to both indoor and outdoor signal line ports. Normal functioning may not be achieved because of the impact of the CDN on the equipment under testing. When this occurs, no immunity test is required.
  • Immunity to continuous conducted signals: Both AC and DC power ports are utilized with radio frequencies greater than 150 kHz.
  • Immunity to radiate electromagnetic fields: The RF test method is described in EN 61000-4-3, light industrial environment testing.
  • Immunity to power supply disturbances: Both AC and DC power ports for low-frequency disturbances are used in this method. 

Emission tests involve measuring the electromagnetic field strength of the emissions that are unintentionally generated by your EMC device.

Like immunity testing, emission testing encompasses different test methods of its own, including:

  • AC power port: For conducted emission on AC power ports in the frequency range of 0,15 MHz to 30 MHz, the test method is specified by EN 55022.
  • DC power port: Power ports are not to be connected to the supplied equipment with a cable longer than 3 m. The EUT is connected to the DC power supply through an artificial network. This provides a defined impedance across EUT at the point of measurement.
  • Telecommunication port: EN 55022 applies for conducted emissions on telecommunication ports in the frequency range of 0,15 MHz to 30 MHz.
  • Radiated emission: For frequency ranges from 30 MHz to 6,000 MHz, the test method and conditioning in EN 55022 applies. 

Expert ETSI EN 300 386 EMC Unintentional Regulatory Testing

Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling. Our RF laboratory engineers strive to give our customers more time and energy on product development instead of testing.

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