Page 29FT D X 1200 O PERA T ING M ANUALrear panelANT 1/2 JacksConnect your main antenna(s) here, using type-M(PL-259) connectors and coaxial feed lines. The in-ternal antenna tuner affects only the antenna(s) con-nected here, and only during transmission.Warning!The 100V RF voltage (@100 W/50 Ω) is applied tothe TX RF section of the transceiver while trans-mitting. Do not touch the TX RF section whiletransmitting.DC IN JackThis is the DC power supply connection for thetransceiver. Use the supplied DC cable to connect di-rectly to a DC power supply, which must be capableof supplying at least 23 A @13.8 VDC.GNDUse this terminal to connect the transceiver to a goodearth ground, for safety and optimum performance.Use a large diameter, short braided cable for makingground connections, and please refer to page 9 forother notes about proper grounding.To prevent damage from lightning, atmo-spheric electricity, electrical shock, etc., becertain to provide a good earth ground.μ-TUNE JacksThese jacks are used to connect the optional RFμTuning Kit, signal in and signal out.ROT JackThis covered 6-pin MINI-DIN Jack accepts a cableto connect to a YAESU G-800DXA/-1000DXA/-2800DXA Antenna Rotator (listed models are cur-rent as of early 2013). You may control the antennaazimuth rotation (and rotation speed) using the Func-tion buttons on the front panel.LINEAR JackThis 10-pin output jack provides band selection data,which may be used for control of optional accesso-ries such as the VL-1000 Solid-state Linear Ampli-fier.TUNER JackThis 8-pin output jack is used for connection to theFC-40 External Automatic Antenna Tuner.RTTY/DATA JackThis 6-pin input/output jack accepts AFSK inputfrom a Terminal Node Controller (TNC) or an op-tional interface unit; it also provides fixed level (100-mV @600 Ohms) receiver audio output, and FSKkeying line.PTT JackThis RCA input jack may be used to provide manualtransmitter activation using a footswitch or otherswitching device. Its function is identical to the[MOX] button on the front panel. The same line isavailable at the RTTY/PKT jack for TNC control.Open-circuit voltage is +5 VDC, and closed-circuitcurrent is 2 mA.