(1) [POWER] Switch Press and hold in this switch for one second to turn the transceiver on. Similarly, press and hold in this switch to turn the transceiver off. (2) [TUNE] Switch This is the on/off switch for the FTDX 1200,s Automatic Antenna Tuner. Pressing this button momentarily places the antenna tuner in line between the transmiter final amplifier and the antenna jack (The "TUNER" icon will appear in the display). Reception is not affected. Pressing and holding in this botton for two seconds, while receiving in an amateur bnad, activates the transmitter for a few seconds while the automatic antenna tuner rematches the antenna system impedance for minimum SWR. The resulting setting is automatically stored in one of the antenna tuner's 100 memories for instant automatic recall later when the receiver is tuned near the same frequency. Pressing this button momentarily, while the Tuner is engaged, will take the Automatic Antenna tuner out of the transmiter line.

NOTE When the Automatic Antenna tuner is tuning itself, a signal is being transmitted. Therefore, be certain that an antenna or dummy load is connected to the selectec antenna jack before pressing and holding in the [TUNE] switch to start antenna tuning. (3) KEY Jack This 1/4-inch, 3-contact jack accepts a CW key or keyer paddles (for the built-in electronic keyer), or output from an external electronic keyer. Pin out is shown on page 15. Key up voltage is +3.3V DC, and key down current is 4 mA. This jack may be configured for a keyer, "Bug", "straight key", or computer keying interface operation via Menu item "019 F CW KEYER" (see page 113). There is another jack with the same name on the rear panel, and it may be configured independently for Internal keyer or pseudo-straight-key operation. NOTE: You cannot use a 2-contact plug in this jack (to do so produces a constant "key down" condition).