(1) ANT 1/2 Jacks Connect your main antenna(s) here, using type-M (PL-259) connectors and coaxial feed lines. The internal antenna tuner affects only the antenna(s) connected here, and only during transmission. WARNING!: The 100V RF voltage (@ 100 W/50 Ohm) is applied to the TX RF section of the transceiver while transmitting. Do not touch the TX RF section while transmitting. (2) DC IN Jack This is the DC power supply connection for the transceiver. Use the supplied DC cable to connect directly to a DC power supply, which must be capable of supplying at least 23 A @ 13.8 VDC. (3) GND Use this terminal to connect the transceivr to a good earth ground, for safety and optimum performance. Use a large diameter, short braided cable for making ground connections, and please refer to page 9 for other notes about proper grounding. WARNING!: To prevent damage from lightning, atmospheric electricity, electrical shock, etc., be certain to provie a good earth ground. (4) µTUNE Jacks These jacks are used to connect the optional RF µTuning Kit, signal in and signal out.

(5) ROT Jack This covered 6-pin MINI-DIN Jack accepts a cable to connect to a YAESU G-800DXA/-1000DXA/-2800DXA Antenna Rotator (listed models are current as of early 2013). You may control the antenna azimuth rotation (and rotation speed) using the Function buttons on the front panel. (6) LINEAR Jack This 10-pin output jack provides band selection data, which may be used for control of optional accessories such as the VL-1000 Solid-state Limear Amplifier. (7) TUNER Jack This 8-pin output jack is used for connecting to the FC-40 External Automatic Antenna Tuner. (8) RTTY/DATA Jack This 6-pin input/output jack accepts AFSK input from a Terminal Node Controller (TNC) or an optional interface unit; it also provides fixed level (100 mV @ 600 Ohms) receiver audio output, and FSK keying line. (9) PTT Jack This RCA input jack may be used to provied manual transmitter activation using a footswitch or other switching device. Its function is identical to the [MOX] button on the front panel. The same line is available at the RTTY/PKT jack for TNC control. Open-circuit voltage is +5VDC, and closed-circuit current is 2 mA.