uld be more difficult to define for a system where the BS may operate with multiple channel bandwidths and where the device may change its channel bandwidth dur- ing operation. The properties of the flexible OFDM-based physical layer have implications on the way that the transmitter modulation quality and the receiver selectivity and blocking requirements are defined. Note that the channel bandwidth in general is different for the BS and the UE. The type of transmitter requirements defined for the device is very similar to those defined for the BS. However, the output power levels are considerably lower for a device, while the restrictions on the device implementation are much higher due to consid- erations for complexity and cost of implementation. The RF requirements are grouped into transmitter and receiver requirements. In addition, there are performance characteristics for base stations and devices that define the receiver baseband minimum performance for all physical channels under different propagation con- ditions. Each RF requirement has a corresponding test defined in the NR test specifications for the BS and the device [2-5]. These specifications define the test setup, procedure, sig- nals, tolerances, etc., which are required to demonstrate the compliance with the RF and performance requirements. The transmitter characteristics define the RF requirements for the desired device/BS trans- mit signal as well as the unwanted signal emissions outside the transmitted signal band- width. These requirements are specified in three categories: (1) output power level requirements set limits on the maximum permissible transmit power, the dynamic variation of the power level, and the transmitter ON/OFF state; (2) transmit signal quality New Radio Access RF and Transceiver Design Considerations requirements define the authenticity of the transmitted signal and the relation between mul- tiple transmitter branches; and (3) unwanted emissions requirements set limits on the emis- sions outside the transmit signal bandw