8 Emission

37.1143GPPActive Antenna System (AAS) Base Station (BS) Electromagnetic Compatibility (EMC)Release 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

8.1 Test configurations

This subclause defines the configurations for emission tests as follows:

– The equipment shall be tested under normal test conditions as specified in the functional standards;

– The test configuration shall be as close to normal intended use as possible;

– If the equipment is part of a system, or can be connected to ancillary equipment, then it shall be 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 shall be selected to simulate actual operation conditions and to ensure that all the different types of termination are tested;

– The test conditions, test configuration and mode of operation shall be recorded in the test report;

– Ports which in normal operation are connected shall be connected to an ancillary equipment or to a representative piece of cable correctly terminated to simulate the input/output characteristics of the ancillary equipment, In case of hybrid AAS BS, Radio Frequency (RF) input/output ports shall be correctly terminated;

– For OTA AAS BS without Radio Frequency (RF) input/output ports but intentionally radiating through the antenna array, the equipment shall be placed in a test setup suitable for the radiated power;

– Ports which are not connected to cables during normal operation, e.g. service connectors, programming connectors, temporary connectors etc. shall not be connected to any cables for the purpose of EMC testing. Where cables have to be connected to these ports, or interconnecting cables have to be extended in length in order to exercise the EUT, precautions shall be taken to ensure that the evaluation of the EUT is not affected by the addition or extension of these cables;

– The test arrangements for transmitter and receiver clauses of the transceiver are described separately for the sake of clarity. However, where possible the test of the transmitter clause and receiver clause of the EUT may be carried out simultaneously to reduce test time.

8.2 Radiated emission from base station

8.2.1 Radiated emission, hybrid AAS BS

This test is applicable to hybrid AAS BS. This test shall be performed on a representative configuration of the hybrid AAS BS.

Depending on RAT capability sets supported by the hybrid AAS BS, the following radiated emission requirements apply:

– For hybrid AAS BS in single RAT UTRA operation, the base stations radiated emission requirements from TS 25.113 [5] apply.

– For hybrid AAS BS in single RAT E-UTRA operation the base stations radiated emission requirements from TS 36.113 [6] apply.

– For hybrid AAS BS in MSR operation, the base stations radiated emission requirements from TS 37.113 [4] apply.

– For hybrid AAS BS in single RAT NR operation, the BS type 1-H radiated emission requirements from TS 38.113 [30] apply.

8.2.2 Radiated emission, OTA AAS BS

This test is applicable to OTA AAS BS. This test shall be performed on a representative configuration of the OTA AAS BS.

For OTA AAS BS, the radiated emission requirement is covered by RF radiated spurious emission requirement in TS 37.105 [2], conforming to the test requirement in TS 37.145-2 [10].

NOTE: As the EMC radiated emissions of the OTA AAS BS cannot be distinguished between the intended emissions (nor to any spurious emissions related to these intentional transmissions) a single radiated emissions requirement is used for the OTA AAS BS.

8.3 Conducted emissions, DC power input/output port

This test is applicable to equipment which may have DC cables longer than 3 m.

If the DC power cable of the radio equipment is intended to be less than 3 m in length, and intended only for direct connection to a dedicated AC to DC power supply, then the measurement shall be performed only on the AC power input of that power supply as specified in subclause 8.4.

This test shall be performed on a representative configuration of the radio equipment.

Depending on RAT capability sets supported by the BS, the following conducted emission requirements apply:

– For AAS BS in single RAT UTRA operation, the DC power input/output port conducted emissions requirements from TS 25.113 [5] apply.

– For AAS BS in single RAT E-UTRA operation, the DC power input/output port conducted emissions requirements from TS 36.113 [6] apply.

– For AAS BS in MSR operation, the DC power input/output port conducted emissions requirements from TS 37.113 [4] apply.

– For AAS BS in single RAT NR operation, the DC power input/output port conducted emissions requirements from TS 38.113 [30] apply.

8.4 Conducted emissions, AC mains power input/output port

This test is applicable to equipment powered by the AC mains.

This test is not applicable to AC output ports which are connected directly (or via a circuit breaker) to the AC power port of the EUT.

This test shall be performed on a representative configuration of the radio equipment.

Depending on RAT capability sets supported by the BS, the following conducted emission requirements apply:

– For AAS BS in single RAT UTRA operation, the AC mains power input/output port conducted emissions requirements from TS 25.113 [5] apply.

– For AAS BS in single RAT E-UTRA operation, the AC mains power input/output port conducted emissions requirements from TS 36.113 [6] apply.

– For AAS BS in MSR operation, the AC mains power input/output port conducted emissions requirements from TS 37.113 [4] apply.

– For AAS BS in single RAT NR operation, the AC mains power input/output port conducted emissions requirements from TS 38.113 [30] apply.

8.5 Harmonic current emissions (AC mains input port)

The requirements of IEC 61000‑3‑2 [11] for harmonic current emission apply for equipment covered by the scope of the present document. For equipment with an input current of greater than 16 A per phase, IEC 61000-3-12 [14] applies.

8.6 Voltage fluctuations and flicker (AC mains input port)

The requirements of IEC 61000‑3‑3 [12] for voltage fluctuations and flicker apply for equipment covered by the scope of the present document. For equipment with an input current of greater than 16 A per phase, IEC 61000-3-11 [13] applies.

8.7 Conducted emissions, telecommunication ports

This test is applicable for radio equipment for fixed use which have telecommunication ports.

This test shall be performed on a representative configuration of radio equipment.

The test method and limits shall be in accordance with CISPR 32 [29], as captured in TS 25.113 [5], TS 36.113 [6], TS 38.113 [30] and TS 37.113 [4] for UTRA, E-UTRA, NR and MSR, respectively.