Kenwood TK-7100H Service Manual

Also see for TK-7100H: Specifications Service manual

Contents

13 Internal Connector41You can easily identify the External Devicesconfiguration of each device.13.2.2 RxD (Input)/TxD (Output)You can program RxD (Input) for Port 2 and TxD(Output) for Port 1.You must use the RxD/TxD terminal at the sametime.The PC controls the transceiver when connecting theRxD/TxD terminal to the RS-232C port using theInterface Cable (KCT-31). However, you mustchange the position of the pin. Refer to Section “21KCT-31” for details.13.2.2.1 ProtocolThe following descriptions are of the RxD/TxDprotocol format:• Send Format: Full Duplex• Sync. Format: Asynchronous• Parity Bit: none• Start Bit: 1 bit• Stop Bit: 2 bits• Data Bit Length: 8 bits• Order of Output Bit: Begin from LSB• Baud Rate: 9600bps13.2.2.2 Communication FormatThe following list is for the communications format:STX + Command + 2nd Data + ETX STXSTX stands for the Start of TX; communicationstarts from STX. The STX value is always 02(Hex). CommandYou can enter the command using the ASCIICode. 2nd DataThis is the data that follows the Command; itsdefinition and data length vary corresponding tothe Command.Some commands do not have the 2nd Data. ETXETX stands for the End of TX; the communicationends with ETX. The ETX value is always 03(Hex).Command Action Direction012 COR Radio to PC34 TOR Radio to PC56789A TX Start BothBC TX End BothDEFGHI DTMF BothJK Volume BothL Channel PC to RadioM Key Status Radio to PCNOPQRST Audio Mute Radio to PCUVWXYZ