6.4 Transmit ON/OFF power

37.145-13GPPActive Antenna System (AAS) Base Station (BS) conformance testingPart 1: conducted conformance testingRelease 17TS

6.4.1 General

Transmitter ON/OFF power requirements apply only to TDD operation of UTRA and E-UTRA.

6.4.2 Transmitter OFF power

6.4.2.1 Definition and applicability

Transmitter OFF power is defined as the mean power measured over 70/N μs filtered with a square filter of bandwidth equal to the RF bandwidth(s) of the BS centred on the central frequency of the RF bandwidth(s) during the transmitter OFF period. N is equal to 1 for UTRA and E_UTRA SCS/15 for NR, where SCS is Sub Carrier Spacing in kHz.

The requirement applies at each TAB connector supporting transmission in the operating band.

For multi-band TAB connectors and for single band TAB connectors supporting transmission in multiple operating bands, the requirement is only applicable during the transmitter OFF period in all supported operating bands.

For AAS BS supporting intra-band contiguous CA, the transmitter OFF power is defined as the mean power measured over 70/N us filtered with a square filter of bandwidth equal to the Aggregated BS Channel Bandwidth BWChannel_CA centred on (Fedge,high+Fedge,low)/2 during the transmitter OFF period. N is equal to 1 if there are any UTRA or E-UTRA carriers, or for NR N = SCS/15, where SCS is the smallest supported Sub Carrier Spacing in kHz in the Aggregated BS Channel Bandwidth.

6.4.2.2 Minimum requirement

There is no transmitter off power requirement for UTRA FDD operation.

The minimum requirement for UTRA TDD 1,28 Mcps option operation are defined in TS 37.105 [8], clause 6.4.2.3.

The minimum requirement for E-UTRA operation are defined in TS 37.105 [8], clause 6.4.2.4.

The minimum requirement for MSR and NR operation are defined in TS 37.105 [8], clause 6.4.2.2.

6.4.2.3 Test purpose

The purpose of this test is to verify the TAB connector transmitter OFF power is within the limits of the minimum requirements.

6.4.2.4 Method of test

6.4.2.4.1 Initial conditions

Test environment:

– normal; see annex B.

RF channels to be tested:

– B, M and T; see clause 4.12.1.

Base Station RF Bandwidth positions to be tested:

– MRFBW in single band operation, see clause 4.12.1; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation; see clause 4.12.1.

6.4.2.4.2 Procedure

The minimum requirement is applied to all TAB connectors, they may be tested one at a time or multiple TAB connectors may be tested in parallel as shown in clause D.1.1. Whichever method is used the procedure is repeated until all TAB connectors necessary to demonstrate conformance have been tested.

1) Connect TAB connector to measurement equipment as shown in clause D.1.1. All TAB connectors not under test shall be terminated.

2) Set each TAB connector to output according to the applicable test configuration in clause 5 using the corresponding test models or set of physical channels in clause 4.12.2. For single carrier set the TAB connector to transmit at manufacturers declared rated carrier output power per TAB connector (PRated,c,TABC).

3) For UTRA and E-UTRA, measure the mean power spectral density measured over 70μs filtered with a square filter of bandwidth equal to the RF bandwidth of the TAB connector centred on the central frequency of the RF bandwidth. 70μs average window centre is set from 35μs after end of one transmitter ON period + 17μs to 35μs before start of next transmitter ON period – 6.25μs.

For NR, measure the mean power spectral density over 70/N μs filtered with a square filter of bandwidth equal to the RF bandwidth of the TAB connector centred on the central frequency of the RF bandwidth. 70/N μs average window centre is set from 35/N μs after end of one transmitter ON period + 10 μs to 35/N μs before start of next transmitter ON period – 10 μs. N = SCS/15, where SCS is Sub Carrier Spacing in kHz.

In addition, for multi-band TAB connector(s), the following steps shall apply:

4) For multi-band TAB connectors and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

6.4.2.5 Test requirements

The measured mean power spectral density according to clause 6.4.2.4.2 shall be less than -83 dBm/MHz for carrier frequency f ≤ 3.0 GHz.

The measured mean power spectral density according to clause 6.4.2.4.2 shall be less than -82.5 dBm/MHz for carrier frequency 3.0 GHz < f ≤ 4.2 GHz.

For multi-band TAB connector, the requirement is only applicable during the transmitter OFF period in all supported operating bands.

NOTE: If the above Test Requirement differs from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.

6.4.3 Transmitter transient period

6.4.3.1 Definition and applicability

The transmitter transient period is the time period during which the transmitter unit is changing from the OFF period to the ON period or vice versa. The transmitter transient period is illustrated in figure 6.4.3.1-1.

Figure 6.4.3.1-1: Illustration of the relations of transmitter ON period,
transmitter OFF period and transmitter transient period

This requirement applies at each TAB connector supporting transmission in the operating band.

6.4.3.2 Minimum requirement

The minimum requirement for MSR operation is in TS 37.104 [12], clause 6.4.2.1.

There is no Transmitter transient period requirement for UTRA FDD operation.

The minimum requirement for single RAT UTRA TDD 1,28 Mcps option operation are defined in TS 25.105 [10], clause 6.5.2.1.2.

The minimum requirement for single RAT E-UTRA operation are defined in TS 36.104 [11], clause 6.4.2.1.

6.4.3.3 Test purpose

The purpose of this test is to verify the TAB connector transmitter transient periods are within the limits of the minimum requirements.

6.4.3.4 Method of test

6.4.3.4.1 Initial conditions

6.4.3.4.1.1 MSR operation

For MSR operation the test for transmitter off power in clause 6.4.2 demonstrates compliance.

6.4.3.4.1.2 UTRA TDD operation

Test environment:

– normal; see clause B.2.

RF channels to be tested for single carrier (SC):

– M; see clause 4.12.1.

RF bandwidth positions to be tested:

– MRFBW in single band operation; see clause 4.12.1; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation, see clause 4.12.1.

Table 6.4.3.4.1.2-1: 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)

6.4.3.4.1.3 E-UTRA operation

Test environment:

– normal; see clause B.2.

RF channels to be tested for single carrier:

– M; see clause 4.12.1.

RF bandwidth positions to be tested for multi-carrier and/or CA:

– MRFBW in single-band operation, see clause 4.12.1; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation, see clause 4.12.1.

6.4.3.4.2 Procedure

6.4.3.4.2.1 MSR operation

For MSR operation the test for transmitter off power in clause 6.4.2 demonstrates compliance.

6.4.3.4.2.2 UTRA TDD operation

The minimum requirement is applied to all TAB connectors, they may be tested one at a time or multiple TAB connectors may be tested in parallel as shown in clause D.1.1. Whichever method is used the procedure is repeated until all TAB connectors necessary to demonstrate conformance have been tested.

1) Connect TAB connector to measurement equipment as shown in clause D.1.1. All TAB connectors not under test shall be terminated.

2) Set each TAB connector to output according to the applicable test configuration in clause 5 using the corresponding test models or set of physical channels in clause 4.12.2. For single carrier set the TAB connector to transmit at manufacturers declared rated carrier output power per TAB connector (PRated,c,TABC).

3) Measure the RRC filtered mean power of the TAB connector 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.

6.4.3.4.2.3 E-UTRA operation

The minimum requirement is applied to all TAB connectors, they may be tested one at a time or multiple TAB connectors may be tested in parallel as shown in clause D.1.1. Whichever method is used the procedure is repeated until all TAB connectors necessary to demonstrate conformance have been tested.

1) Connect TAB connector to measurement equipment as shown in clause D.1.1. All TAB connectors not under test shall be terminated.

As a general rule, the resolution bandwidth of the measuring equipment should be equal to the measurement bandwidth. However, to improve measurement accuracy, sensitivity, efficiency and avoiding e.g. carrier leakage, the resolution bandwidth may be smaller than the measurement bandwidth. When the resolution bandwidth is smaller than the measurement bandwidth, the result should be integrated over the measurement bandwidth in order to obtain the equivalent noise bandwidth of the measurement bandwidth.

2) For a Set each TAB connector to output according to the applicable test configuration in clause 5 using the corresponding test models or set of physical channels in clause 4.12.2. For single carrier set the TAB connector to transmit at manufacturers declared rated carrier output power per TAB connector (PRated,c,TABC).

3) Measure the mean power spectral density over 70μs filtered with a square filter of bandwidth equal to the RF bandwidth of the TAB connector centred on the central frequency of the RF bandwidth. 70μs average window centre is set from 35μs after end of one transmitter ON period + 17 μs to 35 μs before start of next transmitter ON period – 17 μs.

4) For a TAB connector supporting contiguous CA, measure the mean power spectral density over 70 μs filtered with a square filter of bandwidth equal to the Aggregated Channel Bandwidth BWChannel_CA centred on (Fedge_high+Fedge_low)/2. 70 μs average window centre is set from 35 μs after end of one transmitter ON period + 17 μs to 35μs before start of next transmitter ON period – 17 μs.

In addition, for multi-band TAB connector(s), the following steps shall apply:

5) For multi-band TAB connectors and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

6.4.3.5 Test requirements

6.4.3.5.1 MSR operation

For MSR operation the test for transmitter off power in clause 6.4.2 demonstrates compliance.

6.4.3.5.1 UTRA TDD operation

Each value of the power measured according to clause 6.4.3.4.2.2 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 multi-band TAB connector, the requirement is only applicable during the transmitter OFF period in all supported operating bands.

6.4.3.5.1 E-UTRA operation

The measured mean power spectral density according to clause 6.3.5.4.3 shall be less than -83 dBm/MHz for carrier frequency f ≤ 3.0 GHz.

The measured mean power spectral density according to clause 6.3.5.4.3 shall be less than -82.5 dBm/MHz for carrier frequency 3.0 GHz < f ≤ 4.2 GHz.

For multi-band TAB connector, the requirement is only applicable during the transmitter OFF period in all supported operating bands.

NOTE: If the above Test Requirement differs from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.