4 Test conditions

38.1143GPPNRRelease 17Repeaters ElectroMagnetic Compatibility (EMC)TS

4.1 General

Requirements throughout the EMC specifications are in some cases defined separately for different frequency ranges (FR). The frequency ranges FR1 and FR2 are defined in clause 5.1 of TS 38.106 [x].

The equipment shall be tested in normal test environment defined in the corresponding NR Repeater conformance testing specification TS 38.115-1 [x] for NR Repeater type 1-C or TS 38.115-2 [x] for NR Repeater type 2-O. The test conditions shall be recorded in the test report.

For Repeater capable of multi-band operation, the requirements in the present document apply for each supported operating band unless otherwise stated. Operating bands shall be activated according to the test configuration in clause 4.5. Tests shall be performed relating to each type of port and all operating bands shall be assessed during the tests.

The manufacturer shall declare the supported operating band(s) according to the list of NR repeater operating bands defined in TS 38.106 [x].

NOTE 1: NR operating bands for repeater type 1-C, are declared by the manufacturer according to the declaration D.3 specified in TS 38.115-1 [x], table [x].

NOTE 2: NR operating bands for repeater type 2-O, are declared by the manufacturer according to the declaration D.4 specified in TS 38.115-2 [x], table [x].

4.2 Arrangements for establishing a communication link

The wanted RF input signal nominal frequency shall be selected by setting the NR Absolute Radio Frequency Channel Number (NR-ARFCN) to an appropriate number, as defined in TS 38.106 [x], clause 5.3.1.2.

A communication link shall be set up with a suitable test system capable of evaluating the required performance criteria (hereafter called "the test system") at the radio interface and telecommunication port(s) (the BS interface). The test system shall be located outside of the test environment.

When the EUT is required to be in the uplink/downlink operation, the following conditions shall be met:

– For the repeater type 1-C , the EUT shall be commanded to operate at maximum rated output power;

– For the repeater type 2-O testing, the EUT output power shall be configured as stated in clause 8.1 for emission test and clause 9.1 for immunity test accordingly;

– Adequate measures shall be taken to avoid the effect of the unwanted signal on the measuring equipment;

For immunity tests clause 4.3 shall apply and the conditions shall be as follows.

4.3 Narrow band responses

Responses on receivers or duplex transceivers occurring during the immunity test at discrete frequencies which are narrow band responses (spurious responses), are identified by the following method:

– if during an immunity test the quantity being monitored goes outside the specified tolerances (clause 6), it is necessary to establish whether the deviation is due to a narrow band response or to a wide band (EMC) phenomenon. Therefore, the test shall be repeated with the unwanted signal frequency increased, and then decreased by 2 x BW_Channel MHz, where BW_Channel is the channel bandwidth as defined in TS 38.106 [2], clause 5.3;

– if the deviation disappears in either one or both of the above MHz offset cases, then the response is considered as a narrow band response;

– if the deviation does not disappear, this may be due to the fact that the offset has made the frequency of the unwanted signal correspond to the frequency of another narrow band response. Under these circumstances the procedure is repeated with the increase and decrease of the frequency of the unwanted signal set to 2.5 x BW_Channel MHz;

– if the deviation does not disappear with the increased and/or decreased frequency, the phenomenon is considered wide band and therefore an EMC problem and the equipment fails the test.

For immunity test narrow band responses are disregarded.

For EUT capable of multi-band operation, all supported operating bands shall be considered for narrowband responses.

4.4 Exclusion bands

The exclusion band for NR repeater is the frequency range over which no tests of radiated immunity are made in UL or DL.

The exclusion band for DL is defined as:

F_DL,low – Δf_OBUE < f < F_DL,high + Δf_OBUE

Where values of F_DL,low and F_DL,high are defined for each operating band in TS 38.106 [2], clause 5.2.

The exclusion band for UL is defined as:

F_UL,low – Δf_OBUE < f < F_UL,high + Δf_OBUE

Where values of F_UL,low and F_UL,high are defined for each operating band in TS 38.106 [2], clause 5.2.

For NR repeater capable of multi-band operation, the total exclusion band is a combination of the exclusion bands for each operating band supported by NR repeater.

The Δf_OBUE values for Repeater type 1-C and Repeater type 2-O are defined in table 4.4-1 for both DL and UL.

Table 4.4-1: Δf_OBUE offset values for NR repeater 1-C and repeater 2-O

NR repeater type	Operating band characteristics	ΔfOBUE (MHz)
Repeater type 1-C	FUL,high – FUL,low < 100 MHz, or FDL,high – FDL,low < 100 MHz	20
	100 MHz ≤ FUL,high – FUL,low ≤ 900 MHz 100 MHz ≤ FDL,high – FDL,low ≤ 900 MHz	60

NOTE: As the radiated immunity testing is defined in the frequency range 80 MHz to 6 GHz, there is no exclusion band defined for repeater type 2-O.

Where the values of Δf_RIexclusion are defined in table 4.4-2.

Table 4.4-2: Maximum Δf_RIexclusion offset outside the operating band

Operating band characteristics	ΔfRIexclusion (MHz)
100 MHz ≥ FUL,high – FUL,low, or 100 MHz ≥ FDL,high – FDL,low	60
100 MHz < FUL,high – FUL,low, or 100 MHz ≥ FDL,high – FDL,low	200

4.5 NR repeaters test configurations

Texts will be added.