16Advanced17AdvancedHeadphonesInsert headphones (not included) with a 3.5mm plug intothe jack on the left side of the radio. When headphonesare connected, the radio’s speaker is automaticallydisconnected.Lock SwitchThe lock switch is used to prevent unintentionaloperation of the radio.Set the lock switch to the ON position.The lock icon appears, and all buttons will bedisabled. To unlock, move the switch to the OFFposition. disappears.Display BacklightPress to turn on the display backlight for approximately 7 seconds. Press again to turn offthe light immediately.DX/Local SwitchWhen listening to SW or FM broadcasting, the DX/Local switch adjusts the receiver’ssensitivity.When listening to a station with a strong signal, set the switchto LOCAL for best reception. For stations with normal or weaksignals, set to DX for maximum sensitivity.SW EXT. ANTTo improve SW reception, you can connect an optionalexternal antenna (not included) directly to the SW EXT ANTjack receiver. Connecting an external antenna automaticallydisconnects the radio’s built-in antenna.Refer to your antenna’s user’s guide for more details.LOCKSlide to LOCALSW EXT. ANT