Firmware development mode
The primary interface for programming and debugging the nRF9161 DK is the USB port (J6). The USB port is connected to an interface MCU which embeds a SEGGER J-Link-OB (Onboard) debug probe.
Performance measurement mode The nRF9161 DK has flexible configuration options for performance testing and operation analysis. The combination of solder bridges and parameter settings in the interface MCU define the DK's operation mode.