Hello George, you can find pointers to the Motorola WinOncore12 software on my website (_www.jackson-labs.com_ (http://www.jackson-labs.com) ) in the Support/FAQs/GPS section. WinOncore12 decodes or assembles the commands for you, and includes a reference to the Motorola command set (especially for the older receivers). There is a button (MSG) for typing in commands, it will then let you know what the command does, and send it to the receiver. bye, SJ