12 Basic operationBasic operationThis section describes the basic operation of your radio. Thefollowing topics are covered in this section: turning the radio on and off locking your radio unlocking your radio adjusting the speaker volume using voice-operated transmit.Turning the radio on and offGive a long press of the on/off key to turn the radio eitheron or off.When the radio is first turned on, the red, green and amberLEDs flash briefly and the radio gives two short beeps. A briefmessage may appear on the display.Locking your radioYou can lock your radio by either: turning it off and then on again, or using the Main menu.Locking your radio by using the main menu1 Select Menu>Radio settings>Function settings>Lock radio.2 In the Lock Radio menu, choose On.3 Press Select.The radio is now locked and themessage Enter PIN: appears inthe display.Note: If your radio is operating in MPT trunked mode, the DoNot Disturb function activates when the radio is locked.See “Placing the radio in do-not-disturb mode” onpage 47 for more information on this feature.