60 Basic operationTurning the radio on and offRotate the power/volume control switch clockwise toturn the radio on. Rotate the switch counterclockwiseto turn the radio off.When the radio is first turned on, the status LED brieflyglows red, and the radio gives two short beeps.Your radio may not turn on if your battery is verylow. (See "Low battery warning" on page 149.)Long press the on/off key to turn the radio either onor off.When the radio is first turned on, the red, green, andorange LEDs flash briefly, and the radio gives twoshort beeps. A brief message may appear on thedisplay.Security lock on power-up featureYour radio may be automatically locked each time it ispowered-up. If the message Enter PIN appears onthe display, enter your assigned PIN (personalidentification number). See “Unlocking the radio”below.volume control on/offStandard control head Hand-held control head