8Appendix A: Advanced Installation ................................................................................................................................................... 209Precautions ......................................................................................................................................................................................... 209Cable Wiring ...................................................................................................................................................................................... 209Connecting to the Computer (DSUB-25) ........................................................................................................................................... 209Connecting to your Radios ................................................................................................................................................................. 212Appendix B: Advanced Information .................................................................................................................................................. 215Assembly and Disassembly ............................................................................................................................................................... 215Hard Reset.......................................................................................................................................................................................... 215Calibration/Equalization .................................................................................................................................................................... 216PTT (Push-to-Talk) Watchdog Timer ................................................................................................................................................ 217Microprocessor Watchdog Timer ...................................................................................................................................................... 217A/D Converter .................................................................................................................................................................................... 217KPC-3 Plus Jumpers .......................................................................................................................................................................... 218Appendix C: Options for the KPC-3 Plus .......................................................................................................................................... 221Low Power Operation ........................................................................................................................................................................ 221Expanding the RAM in the KPC-3 Plus ............................................................................................................................................ 221Installing the Optional Real-time Clock Module ............................................................................................................................... 221Replacing the Lithium Battery ........................................................................................................................................................... 222Appendix D: In Case of Difficulty ...................................................................................................................................................... 223KPC-3 Plus Does Not “Sign-On” to Computer ................................................................................................................................. 223You Are Unable to Make a “Connect” .............................................................................................................................................. 223Cannot Transmit................................................................................................................................................................................. 223Cannot Return to Command Mode .................................................................................................................................................... 224Appendix E: Additional Information ................................................................................................................................................. 225Specifications ..................................................................................................................................................................................... 225Messages from the KPC-3 Plus ......................................................................................................................................................... 226ASCII Chart ....................................................................................................................................................................................... 232KPC-3 Plus Parts List ........................................................................................................................................................................ 233KPC-3 Plus Parts List ........................................................................................................................................................................ 233KPC-3 Plus MX Parts List ................................................................................................................................................................. 234KPC-3 Plus Parts Layout ................................................................................................................................................................... 235KPC-3 Plus MX Parts Layout ............................................................................................................................................................ 236