6.2 Maximum output power
25.1423GPPBase Station (BS) conformance testing (TDD)Release 17TS
6.2.1 Definition and applicability
The following terms are defined in subclause 3.1.
– Output power, Pout.
– Rated output power, PRAT.
– Rated total output power
– Maximum output power, Pmax.
6.2.2 Minimum Requirements
In normal conditions, the base station maximum output power shall remain within +2 dB and -2 dB of the manufacturer’s rated output power.
In extreme conditions, the base station maximum output power shall remain within +2,5 dB and -2,5 dB of the manufacturer’s rated output power.
In certain regions, the minimum requirement for normal conditions may apply also for some conditions outside the ranges defined for the Normal test environment in subclause 5.9.1.
The normative reference for this requirement is TS 25.105 [1] subclause 6.2.1.1.
6.2.3 Test purpose
The test purpose is to verify the accuracy of the maximum output power across the frequency range and under normal and extreme conditions for all transmitters in the BS.
6.2.4 Method of test
6.2.4.1 Initial conditions
6.2.4.1.0 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 for multi-carrier: BRFBW, MRFBW and TRFBW in single band operation; see subclause 5.3; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation, see subclause 5.3.
In addition, for only one UARFCN or RF bandwidth position, the test shall be performed under extreme power supply as defined in subclause 5.9.4.
NOTE: Tests under extreme power supply also test extreme temperature.
6.2.4.1.1 3,84 Mcps TDD option
(1) The transmitter under test and all other transmitters of the base station (if any) are switched on.
(2) The power of the transmitters not under test (if any) are controlled down.
(3) Connect the power measuring equipment to the BS antenna connector.
(4) Set the parameters of the transmitted signal according to table 6.1. For MBSFN IMB operation the set of parameters for the transmitted signals is according to IMB test model 1 in subclause 6.1.1.1.
Table 6.1: Parameters of the transmitted signal for maximum output power 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 eachtime slot under test |
9 |
|
Power of each DPCH |
1/9 of Base Station output power |
|
Data content of DPCH |
real life (sufficient irregular) |
6.2.4.1.2 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 6.1A at manufacturer’s declared rated output power, PRAT.
For a BS declared to be capable of multi-carrier operation, set the base station to transmit according to Table 6.1A on all carriers configured using the test configuration and corresponding power setting specified in sub-clause 5.20 and 5.21
Table 6.1A: Parameters of the transmitted signal 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 1,2,3. |
|
Time slots under test |
TS4, TS5 and TS6 |
|
Number of DPCH in each time slot under test |
8 |
|
Power of each DPCH |
1/8 of Base Station output power |
|
Data content of DPCH |
real life (sufficient irregular) |
6.2.4.1.3 7,68 Mcps TDD option
(1) The transmitter under test and all other transmitters of the base station (if any) are switched on.
(2) The power of the transmitters not under test (if any) are controlled down.
(3) Connect the power measuring equipment to the BS antenna connector.
(4) Set the parameters of the transmitted signal according to table 6.1AA.
Table 6.1AA: Parameters of the transmitted signal for maximum output power 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 eachtime slot under test |
9 |
|
Power of each DPCH |
1/9 of Base Station output power |
|
Data content of DPCH |
real life (sufficient irregular) |
6.2.4.2 Procedure
6.2.4.2.1 3,84 Mcps TDD option
(1) Measure the output power of the BS signal.
(2) Run step (1) for RF channels Low / Mid / High.
6.2.4.2.2 1,28 Mcps TDD option
(1) Measure the Mean power of the BS signal at the antenna connector.
(2) Run step (1) for RF channels or RF bandwidth positions defined in sbclasue 6.2.4.1.0.
In addition, for a multi-band capable BS, the following steps shall apply:
(3) For multi-band capable BS and single band tests, repeat the test per involved band with no carrier activated in the other band.
(4) For multi-band capable BS with separate antenna connector, the antenna connector not being under test in case of single-band or multi-band test shall be terminated.
6.2.4.2.3 7,68 Mcps TDD option
(1) Measure the output power of the BS signal.
(2) Run step (1) for RF channels Low / Mid / High.
6.2.5 Test Requirements
NOTE: If the Test Requirement below 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 subclause 5.11 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in Annex D.
In normal conditions, the measured output power, derived according to subclause 6.2.4.2, shall remain within +2,7 dB and -2,7 dB of the manufacturer’s rated output power, PRAT.
In extreme conditions, the measured output power, derived according to subclause 6.2.4.2, shall remain within +3,2 dB and -3,2 dB of the manufacturer’s rated output power, PRAT.