Question: What is a key characteristic of a RedCap UE (Reduced Capability User Equipment) in terms of Downlink (DL) MIMO layers for Frequency Range 1 (FR1), when only 1 Rx branch is supported?
Option 1: Up to 4 DL MIMO layers are supported
Option 2: Only 1 DL MIMO layer is supported, with an option for more if additional Rx branches are added
Option 3: At least 2 DL MIMO layers must be supported, with the possibility of more
Option 4: Exactly 1 DL MIMO layer is supported, with no support for additional layers even with more Rx branches
Explanation: According to the RedCap UE definition, for FR1, if 1 Rx branch is supported, then only 1 DL MIMO layer is supported. However, this option correctly implies flexibility (highlighted by "with an option for more if additional Rx branches are added"), aligning with the specification that if 2 Rx branches are supported, then 2 DL MIMO layers can be supported, thus showcasing a nuanced understanding of the RedCap UE's capabilities based on the number of Rx branches.