41Functions to Use as NecessaryUsing the Transceiver for Packet CommunicationYou can perform packet communication with your transceiver by connecting a TNC (Ter-minal Node Controller) using an optional Microphone Adapter (CT-44).TNCSPGNDGND2 kΩ10 FμMICMICEARPTTCT-44MIC/SP jackAfter connecting the TNC to the transceiver, set the output signal level to the TNC byadjusting the sound volume level of the transceiver.Also, adjust the signal level input to your transceiver using the output level adjustmentvolume on the TNC (Input level cannot be adjusted on your transceiver).When sending a vast volume of data, the transmission takes a longer time and thetransceiver may be overheated. If the transmission is continued for a long time, theoverheat prevention circuit will operate and the transmission power decreases. If thetransmission is continued further, the transmission will be automatically stopped toprevent the transceiver from overheating and consequently malfunctioning. If the overheatprevention circuit has operated the transceiver returns to the receive mode, turn thetransceiver OFF, or leave it in the receive mode until the temperature falls.• Set the receive battery Save Function to OFF during packet communication by pressingand holding the [DISP] key touch [CONFIG] [17 SAVE RX].• Reception can be interfered with by noise generated by the Personal Computer.• If the transceiver enters an abnormal receive state, disconnect the transceiver from thePC, and reconnect it to the PC using a photo coupler device or noise filter.• For details on how to connect a TNC to the PC, refer to the TNC instruction manual.