Note the assigned (e.g., COM3). If an exclamation mark appears, download the official USB-to-Serial driver associated with your specific cable brand. Initial Software Setup and Programming Basics

Dealers will provide you with a direct download link via a secure cloud portal, or a physical CD-ROM/USB drive containing the software package and the necessary device drivers. Step-by-Step Installation Guide

If the software cannot read or write to the radio, check your Windows Device Manager. Find the section marked "Ports (COM & LPT)" to verify which COM port number your USB cable is using. Go into the KPG-D6N software settings, open the Communication Port menu, and change it to match the Device Manager number. 2. "Model Mis-match" Error