Ensure your PC is running a compatible version of Windows (Version 3.28 is a common stable release) and that you have the correct serial-to-USB adapter if your computer lacks a native DB9 port.
Connect your PC to the maintenance port of the antenna's Switchplate or Interface Control Box.
Some models require a separate flash for the RF board. This often involves powering the system down or putting it in a specific "Halt" state before selecting the RF flash file manually. Why Update?