6.4 Transmit ON/OFF power

36.1043GPPBase Station (BS) radio transmission and receptionEvolved Universal Terrestrial Radio Access (E-UTRA)Release 18TS

The requirements in clause 6.4 are only applied for E-UTRA, E-UTRA with NB-IoT and NB-IoT TDD BS.

6.4.1 Transmitter OFF power

Transmitter OFF power is defined as the mean power measured over 70 us filtered with a square filter of bandwidth equal to the transmission bandwidth configuration of the BS (BW_Config) centred on the assigned channel frequency during the transmitter OFF period.

For BS supporting intra-band contiguous CA, the transmitter OFF power is defined as the mean power measured over 70 us filtered with a square filter of bandwidth equal to the Aggregated Channel Bandwidth BW_{Channel_CA} centred on (F_{edge_high}+F_{edge_low})/2 during the transmitter OFF period.

6.4.1.1 Minimum Requirement

The transmitter OFF power spectral density shall be less than -85dBm/MHz.

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

6.4.2 Transmitter transient period

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 6.4.2-1.

Figure 6.4.2-1 Illustration of the relations of transmitter ON period, transmitter OFF period and transmitter transient period.

6.4.2.1 Minimum requirements

The transmitter transient period shall be shorter than the values listed in Table 6.4.2.1-1.

Table 6.4.2.1-1 Minimum requirements for the transmitter transient period

Transition	Transient period length [us]
OFF to ON	17
ON to OFF	17