11PANEL DESCRIPTION12345678910111213141516171819N Main unitq e r twyRear viewq ANTENNA CONNECTOR [ANT] (p. IX)Connects a 50 Ω antenna with a PL-259 connector and a50 Ω coaxial cable for transmission and reception.w COOLING FANRotates while transmitting.Also rotates while receiving depending on the setting inFUNC set mode (SET). (p. 101)e DATA JACK [DATA] (p. 57)± Connect a PC through the optional data communicationcable OPC-1529R, for low-speed data communicationin DV mode or data cloning with the cloning softwareCS-80/880 (free download).± Connect a GPS receiver through the optional data com-munication cable OPC-1529R, for GPS operation.r PACKET JACK [PACKET] (pgs. 120, 121)Connects a TNC (Terminal Node Controller) , etc. for datacommunications. The receiver can support 1200/9600 bpspacket communication (AFSK/GMSK).t EXTERNAL SPEAKER JACK [SP]± Connects an 8 Ω speaker.• Audio output power is more than 2.0 W.± Connect an optional cloning cable OPC-478UC or OPC-474 for data cloning.y 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 sensitiv-ity. The transceiver accepts a 50 Ω antenna and a VoltageStanding Wave Ratio (VSWR) of 1.5:1 or less. High SWRvalues not only may damage the transceiver but also leadto TVI or BCI problems.