41 PANEL DESCRIPTIONq DC POWER CONNECTOR [DC]Accepts 13.8 V DC through a DC power cable.w FAN CONNECTOR [FAN]Connects to the optional CFU-F8100 Cooling Fan.NOTE: Attach the protect plug when the optionalCooling Fan is not used.e SPEAKER JACK [SP]Connects to an external speaker such as the sup-plied SP-35/L.r ACCESSORY CONNECTOR (9 PIN) [ATU]Connects to the optional antenna tuner through theOPC-2309 antenna tuner cable.NOTE: Attach the connector caps when the op-tional cable is not connected.t ACCESSORY CONNECTOR (15 PIN) [ACC]➥ Connects to an optional UX-248 gps unit.➥ Connects to a GPS unit or an external modemthrough the optional OPC-2308 gps/extmod con-nection cable.When connecting a GPS unit, the transceiversets your position and time data in NMEA0183version 3.xx format.NOTE: Attach the connector caps when the op-tional unit or cable is not connected.y USB CONNECTOR [USB]Connects to a PC through an A-B type USB cable.u ANTENNA CONNECTORConnects to a 50 Ω (unbalanced) HF band antenna.i GROUND TERMINALIMPORTANT! Connects to a solid ground point.USBACCGNDANTuytATUriDCq FANProtect plugw SPe■ Rear panel