equirements are defined similar to those in FR1 and with the same limits. Radiated unwanted emissions: Occupied bandwidth, ACLR, spectrum mask, and spurious emissions are defined in the same way as for FR1. The latter two are based on TRP. The limits are relatively less stringent than those in FR1. The ACLR is approximately 10 dB more relaxed compared to FR1, due to more suitable coexistence conditions. Reference sensitivity and dynamic range: These are defined similar to the counterparts in FR1; however, the levels are not comparable. Receiver susceptibility to interfering signals: ACS, in-band, and OOB blocking are defined similar to FR1. There is no requirement for narrowband blocking, since there are only wideband systems in FR2. The ACS is approximately 10 dB more relaxed rela- tive to its counterpart in FR1 due to better coexistence conditions (Fig. 5.12). The device output power level is set by taking the following considerations into account [10]: 1. UE Power Class defines a nominal maximum output power for QPSK modulation. It may be different in different operating bands, but the main device power class is cur- rently set to 23 dBm for all bands. 2. Maximum Power Reduction (MPR) defines the allowed reduction of maximum power level for certain combination of modulation scheme and resource block allocation. The 5 MHz 5 MHz BW=BW channel BW=BW channel ACS-SNR-IM 33-SNR-IM NR wanted signal NR wanted signal channel channel BW channel +2.5 MHz BW channel Figure 5.12 Illustration of UE ACS requirements [14]. 696 Chapter 5 UE is allowed to reduce the maximum output power due to higher order modulations and transmit bandwidth configurations. For UE power class 2 and 3 the allowed MPR are speci- fied in [3] for channel bandwidths that meets both of the following criteria: Channel_Bandwidth < 100 MHz and Relative Channel Bandwidth < 4% (TDD bands) and < 3% (FDD bands), where Relative Channel Bandwith = 2BW 3. Additional Maximum Power Reduction (A-MPR) may be applied in some regions and is usually related to specifi