51 PANEL DESCRIPTION Rear Panelq DATA SOCKET [DATA]Connects a TNC (Terminal Node Controller), etc. for datacommunications.• See p. 6 for connection information.w EXTERNAL SPEAKER JACK [SP]Connects an 8 Ω speaker.• Audio output power is more than 2.0 W.e COOLING FANRotates while transmitting.Also rotates while receiving depending on the setting in ini-tial set mode. (p. 61)r ANTENNA CONNECTOR [ANT]Connects a 50 Ω antenna with a PL-259 connector and a50 Ω coaxial cable.t POWER RECEPTACLE [DC13.8V]Accepts 13.8 V DC ±15% with the supplied DC powercable. NOTE: DO NOT use a cigarette lighter socket as apower source when operating in a vehicle. The plugmay cause voltage drops and ignition noise may be su-perimposed onto transmit or receive audio.ANTENNA INFORMATIONFor radio communications, the antenna is of critical impor-tance, to maximize your output power and receiver sensi-tivity. The transceiver accepts a 50 Ω antenna and lessthan 1:1.5 of Voltage Standing Wave Ratio (VSWR). HighSWR values not only may damage the transceiver but alsolead to TVI or BCI problems.q w ret
