How to put RAK2287 in continuous transmissions test mode for FCC certification

We currently use the RAK2287 pcie module in one of our products. It will go through EMC testing for FCC certification. The lab requested that we put the module in continuous transmission mode. Are there instructions and commands for this?

Our product OS is Ubuntu 20.04.6 LTS. The module connects to the main board through USB interface and shows up as ttyACM.