: Analog Devices provides a Filter Wizard Tool to generate these custom profiles for bandwidths like 16 MHz.
: Synchronize and stream data via GPIO or other interfaces. Additional Configuration Files
Based on technical support resources, the most common "RAR" file related to this hardware is a project archive for running the device without an operating system (No-OS). Relevant Resource: Baremetal Source Code
In the context of software-defined radio (SDR) and the transceiver, a "piece" of code or configuration often refers to the baremetal source code or specific filter profiles required to operate the device.
If you are specifically looking for filter configurations, users often share custom profiles (frequently compressed in .rar format) to manage Rx Gain issues or bandwidth settings.