vowsqO54 PusREAR PANEL® Indicators@ STEP: Lights when the STEP switch is ON.® BUSY: Lights when the center signal is receivedwith the SQL switch ON.© REV &LOCK: Lights when the REV & LOCK switch isON. :@ ONAIR: Lights when transmitting.© DCs: Lights when the DCS switch is ON.@® CAL: Lights when the C.AL switch is ON.@ D.sa: Lights when the D.SQ switch is ON.Note:When changing the voltage setting, be sure toNote:When operating by AC line source, be surethe dummy plug (8) is connected to its jack,otherwise the transceiver is not turned on.® ANT jackM type antenna jack of 50 ohm impedance.@ GND terminalConnect a good earth ground to this terminal.@® EXT. SP jackFor connecting an external 8-ohm speaker.@ ST BY switchWhen using an external standby switch, use the suppliedplug.@® KEY jackFor connecting a CW key. Use the supplied plug.® ACC2 jackFor connecting data communication devices such as10use the correct fuse:@ 2A fuse for 120V@ 1A fuse for 220V/240VRTTY, etc. (For details, see page 21.)ACC1 jackFor connecting a computer interface. (For details, seepage 21.)@® AC receptacleAC line input. Use the supplied cable.DC receptacleFor connecting a DC power source. Remove the dummyplug and plug in the optional DC cable. Observe polaritieswhen connecting.©® Voltage selection switchAllows selection of three different voltages, 120V, 220Vand 240V.