6.4 Transmit ON/OFF power
37.1413GPPMulti-Standard Radio (MSR) Base Station (BS) conformance testingNR, E-UTRA, UTRA and GSM/EDGERelease 17TS
The requirements in clause 6.4 are only applied for BC3 BS.
6.4.1 Definition and applicability
For UTRA and E-UTRA, transmitter OFF power is defined as the mean power measured over 70 us filtered with a square filter of bandwidth equal to the Base Station RF Bandwidth(s) of the BS centred on the central frequency of the Base Station RF Bandwidth(s) during the transmitter OFF period.
For NR, transmitter OFF power is defined as the mean power measured over 70/N us filtered with a square filter of bandwidth equal to the transmission bandwidth configuration of the BS (BWConfig) centred on the central frequency of the Base Station RF Bandwidth(s) during the transmitter OFF period. N = SCS/15, where SCS is Sub Carrier Spacing in kHz.
For 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.
The transmitter transient period is the time period during which the transmitter is changing from the OFF period to the ON period or vice versa. The transmitter transient period is illustrated in Figure 6.4.1-1 and Figure 6.4.1-2.
Figure 6.4.1-1: Illustration of the relations of transmitter ON period, transmitter OFF period and transmitter transient period (for E-UTRA/UTRA)
Transmitter output power
Time
Transmitter ON period
(DL transmission)
Transmitter OFF
period
Transmitter OFF
period
Transmitter transient
period
OFF power level
ON power level
(Informative)
UL transmission
GP or UL transmission
Figure 6.4.1-2: Illustration of the relations of transmitter ON period, transmitter OFF period and transmitter transient period (for NR)
6.4.2 Minimum Requirement
The minimum requirement is in TS 37.104 [2] clause 6.4.1.1 and clause 6.4.2.1.
6.4.3 Test purpose
The purpose of this test is to verify the BC3 BS transmitter OFF power and transient periods are within the limits of the minimum requirements.
6.4.4 Method of test
6.4.4.1 Initial conditions
Test environment: normal; see Annex B.2.
Base Station RF Bandwidth positions to be tested: MRFBW in single band operation, see clause 4.9.1; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation; see clause 4.9.1.
Connect the signal analyzer to the MSR BS antenna connector as shown in Annex D.1.1.
6.4.4.2 Procedure
1) Set the BS to transmit a signal according to the applicable test configuration in clause 5 using the corresponding test models or set of physical channels in clause 4.9.2.
2) For UTRA and E-UTRA, measure the mean power spectral density measured over 70μs filtered with a square filter of bandwidth equal to the Base Station RF Bandwidth centred on the central frequency of the Base Station 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 antenna 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.
For multi-band capable BS with separate antenna connector, the antenna connector not being under test shall be terminated.
6.4.5 Test requirement
The transmitter OFF power spectral density shall be less than -83 dBm/MHz.
For BS capable of multi-band operation, the requirement is only applicable during the transmitter OFF period in all supported operating bands.
The measured mean power spectral density according to clause 6.4.4.2 shall be less than -83 dBm/MHz for carrier frequency f ≤ 3.0 GHz.
The measured mean power spectral density shall be less than -82.5dBm/MHz for carrier frequency 3.0 GHz < f ≤ 4.2 GHz.
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 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance are given in Annex C.