6.5 Transmit ON/OFF power

25.1423GPPBase Station (BS) conformance testing (TDD)Release 17TS

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

6.5.1 Transmit OFF power

6.5.1.1 Definition and applicability

The transmit OFF power is defined as the RRC filtered mean power measured over one chip when the transmitter is off.

6.5.1.2 Minimum Requirements

6.5.1.2.1 3,84 Mcps TDD option

The transmit OFF power shall be less than -79 dBm.

6.5.1.2.2 1,28 Mcps TDD option

The transmit OFF power shall be less than -82 dBm.

For BS capable of multi-band operation, the requirement is only applicable during the transmitter OFF period in all supported operating bands.The normative reference for this requirement is TS 25.105 [1] subclause 6.5.1.

6.5.1.2.3 7,68 Mcps TDD option

The transmit OFF power shall be less than -76 dBm.

6.5.1.3 Test purpose

This test verifies the ability of the BS to reduce its transmit OFF power to a value below the specified limit. This ability is needed to minimize the interference for other users receiving on the same frequency.

6.5.1.4 Method of test

6.5.1.4.1 Initial conditions

The conformance testing of transmit OFF power is included in the conformance testing of transmit ON/OFF time mask; therefore, see subclause 6.5.2.4.1 for initial conditions.

6.5.1.4.2 Procedure

The conformance testing of transmit OFF power is included in the conformance testing of transmit ON/OFF time mask; therefore, see subclause 6.5.2.4.2 for procedure.

6.5.1.5 Test Requirements

The conformance testing of transmit OFF power is included in the conformance testing of transmit ON/OFF time mask; therefore, see subclause 6.5.2.5 for test requirements.

6.5.2 Transmit ON/OFF time mask

6.5.2.1 Definition and applicability

The transmit ON/OFF time mask defines the ramping time allowed for the BS between transmit OFF power and transmit ON power.

6.5.2.2 Minimum Requirements

6.5.2.2.1 3,84 Mcps TDD option

The transmit power level versus time should meet the mask specified in figure 6.1.

Figure 6.1: Transmit ON/OFF template

6.5.2.2.2 1,28 Mcps TDD option

The transmit power level versus time should meet the mask specified in figure 6.1A.

Figure 6.1A: Transmit ON/OFF template for 1,28 Mcps TDD option

The normative reference for this requirement is TS 25.105 [1] subclause 6.5.2.

6.5.2.2.3 7,68 Mcps TDD option

The transmit power level versus time should meet the mask specified in Figure 6.1B.

Figure 6.1B: Transmit ON/OFF template

6.5.2.3 Test purpose

This test verifies the ability of the BS to reduce its transmit power outside of the active part of the Tx time slot (burst without guard period) to values below specified limits. This ability is needed to minimize the interference for other users receiving on the same frequency.

6.5.2.4 Method of test

6.5.2.4.1 Initial conditions

6.5.2.4.1.0 General test conditions

Test environment: normal; see subclause 5.9.1.

RF channels to be tested for single carrier: B, M and T; see subclause 5.3.

RF bandwidth positions to be tested: B_RFBW, M_RFBW and T_RFBW in single band operation; see subclause 5.3; B_RFBW_T’_RFBW and B’_RFBW_T_RFBW in multi-band operation, see subclause 5.3.

6.5.2.4.1.1 3,84 Mcps TDD option

(1) Connect the power measuring equipment to the BS antenna connector.

(2) Set the parameters of the transmitted signal according to table 6.11.

Table 6.11: Parameters of the transmitted signal for transmit ON/OFF time mask test

Parameter	Value/description
TDD Duty Cycle	TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd.
Time slot carrying SCH	TS0
Time slots under test	TS i, i even and non zero
BS output power setting	PRAT
Number of DPCH in each time slot under test	9
Power of each DPCH	1/9 of Base Station output power
Data content of DPCH	Real life (sufficient irregular)

6.5.2.4.1.2 1,28 Mcps TDD option

(1) Connect the power measuring equipment to the BS antenna connector under test.

(2) For a BS declared to be capable of single carrier operation only, set the parameters of the transmitted signal according to Table 6.11A at manufacturer’s declared output power, PRAT.

For a BS declared to be capable of multi-carrier operation, set the base station to transmit according to Table 6.11A on all carriers configured using the applicable test configuration and corresponding power setting specified in subclase 5.20 and 5.2

Table 6.11A: Parameters of the transmitted signal for transmit ON/OFF time mask test for 1,28 Mcps TDD

Parameter	Value/description
TDD Duty Cycle	TS i; i = 0, 1, 2, 3, 4, 5, 6: transmit, if i is 0,4,5,6; receive, if i is UpPCH,1,2,3.
Time slots under test	TS4, TS5 and TS6
Number of DPCH in each time slot under test	8
Data content of DPCH	real life (sufficient irregular)

6.5.2.4.1.3 7,68 Mcps TDD option

(1) Connect the power measuring equipment to the BS antenna connector.

(2) Set the parameters of the transmitted signal according to table 6.11B.

Table 6.11B: Parameters of the transmitted signal for transmit ON/OFF time mask test

Parameter	Value/description
TDD Duty Cycle	TS i; i = 0, 1, 2, …, 14: transmit, if i is even; receive, if i is odd.
Time slot carrying SCH	TS0
Time slots under test	TS i, i even and non zero
BS output power setting	PRAT
Number of DPCH in each time slot under test	9
Power of each DPCH	1/9 of Base Station output power
Data content of DPCH	Real life (sufficient irregular)

6.5.2.4.2 Procedure

6.5.2.4.2.1 3,84 Mcps TDD option

(1) Measure the RRC filtered mean power of the BS output signal chipwise (i.e. averaged over time intervals of one chip duration) over the period starting 65 chips before the start of the odd time slots TS i (receive time slots of the BS), and ending 27 chips before the next even time slot (transmit time slot of the BS) starts.

6.5.2.4.2.2 1,28 Mcps TDD option

(1) Measure the RRC filtered mean power of the BS output signal chipwise (i.e. averaged over time intervals of one chip duration) over the transmit off power period starting 11 chips before the start of the receive time slot TS i = UpPCH, and ending 8 chips before the next transmit time slot TS i=4 starts.

In addition, for a multi-band capable BS, the following steps shall apply:

(2) For multi-band capable BS with separate antenna connector, the antenna connector not being under test shall be terminated.

6.5.2.4.2.3 7,68 Mcps TDD option

(1) Measure the RRC filtered mean power of the BS output signal chipwise (i.e. averaged over time intervals of one chip duration) over the period starting 130 chips before the start of the odd time slots TS i (receive time slots of the BS), and ending 54 chips before the next even time slot (transmit time slot of the BS) starts.

6.5.2.5 Test Requirements

NOTE: If the Test Requirements below differ from the Minimum Requirements, then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in subclause 5.11 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in Annex D.

6.5.2.5.1 3,84 Mcps TDD option

Each value of the power measured according to subclause 6.5.2.4.2.1 shall be below – 32,3 dBm in the period from 32 chips to 84 chips after the burst and below – 77 dBm in the period where the Tx OFF power specification is applicable.

6.5.2.5.2 1,28 Mcps TDD option

Each value of the power measured according to subclause 6.5.2.4.2.2 shall be below – 41,3 dBm in the period from 85 chips to 88 chips after the burst and below – 80 dBm in the period where the Tx OFF power specification is applicable.

For BS capable of multi-band operation, the Tx OFF power requirement is only applicable during the transmitter OFF period in all supported operating bands.

6.5.2.5.3 7,68 Mcps TDD option

Each value of the power measured according to subclause 6.5.2.4.2.3 shall be below – 32,3 dBm in the period from 64 chips to 168 chips after the burst and below – 74 dBm in the period where the Tx OFF power specification is applicable.