19Our Assumptions about YouWe assume that you are familiar with the following or that you can get help on thesetopics if necessary:general familiarity with your radio equipment and its intended usesbasic use of your computer and its operating system, including copying disks andfiles, working with directories, and identifying and using the serial (COM) ports onyour computerbasic electronics needed if you are going to build or upgrade hardware yourself,(e.g., making cables)Documentation ConventionsThe following conventions are used in the KPC-3 Plus documentation:To indicate a particular key, the name of the key is given in capitals. For example, pressthe ENTER key.Sometimes you need to hold down one key on the computer while pressing anotherkey. This is indicated by giving the name of the first key, then a plus ‗+‘, then the nameof the second key. For example, ―Ctrl+C‖ means ―press the key labeled ‗CTRL‘ or ‗Ctrl‘(i.e., the ―control‖ key) and, while continuing to hold it down, press the ‗C‘ key‖. Multiple-key combinations that generate a single character are shown in angle brackets, like this:.Conventions for the KPC-3 Plus commands are covered in the ―Command Reference‖section of this manual.Overview of Packet RadioThis section gives a brief overview of packet radio, for those who are new to packetradio and those who want to review the topic.Topics covered are:The three basic components of a packet radio stationSending a message from one station to anotherDetails about packetsA brief discussion of protocolsAn overview of the insides of the KPC-3 PlusIf you are already familiar with packet radio, you may wish to skip the rest of thischapter, or give it a quick review.