d into three main configurations from RF require- ments perspective as follows [5]: BS type 1-C: An NR BS operating in FR1 which is connected to the antennas via coax- ial cables. The RF requirements for this BS type only consist of conducted requirements defined at individual antenna connectors. For BS type 1-C, the requirements are applied at the BS antenna connector (port A). If any external apparatus such as an amplifier, a filter, or the combination of such devices is used, the RF requirements apply at the far end antenna connector (port B). BS type 1-H: An NR BS operating in FR1 consisting of an integrated AAS with RF trans- ceiver connected to antennas using a TAB connector. The requirement set for this BS type consists of conducted requirements defined at individual TAB connectors and OTA requirements defined at the RIB. For BS Type 1-H, the requirements are defined for two points of reference, signified by radiated requirements and conducted requirements. BS type 1-0: A connector-less AAS-type NR BS operating in FR1 whose RF require- ment set only consist of OTA requirements defined at the RIB. BS type 2-O: A connector-less AAS-type NR BS operating in FR2 whose RF require- ment set only consists of OTA requirements defined at the RIB. 668 Chapter 5 For BS Type 1-O and BS Type 2-O, the radiated characteristics are defined over the air, where the operating band-specific radiated interface is referred to as the RIB. The radiated requirements are also referred to as OTA requirements. The (spatial) characteristics in which the OTA requirements apply are detailed for each requirement. Fig. 5.6 illustrates the NR BS configurations and the reference points for conducting connected or OTA measure- ments. Note that one of the RF configurations for FR1 does not require connectors between the RF transceivers and antennas according to BS Type 1-O; thus smaller equipment size and improved power efficiency can be expected relative to the LTE transceivers with AAS specified in 3GPP Rel-13. While the operation in FR2 has