OTHER OP-4TIME-OUT TIMER (TOT)It is sometimes necessary or desirable to restrict a singletransmission to a specifi c maximum time. You may use thisfunction to prevent repeater time-outs when accessing repeaters,or to conserve battery power.When TOT times out (default is 10 minutes), the transceivergenerates beeps and automatically returns to receive mode. Toresume transmitting, release and then press the microphone[PTT] again.1 Enter Menu mode and access Menu 109.2 Set the timer to 3, 5, or 10 minutes.MICROPHONE SENSITIVITYThe input level to the microphone can be confi gured.1 Enter Menu mode and access Menu 110.2 Set the Microphone Sensitivity to HIGH, MEDIUM or LOW.Note: The higher the input level to the microphone is confi gured, the easier togain the surrounded sounds.POWER ON MESSAGEEach time you switch the transceiver ON, “HELLO !!” (default: PMOFF) appears on the display for approximately 2 seconds. Youcan program your favorite message (for PM OFF, PM 1 ~ 5) inplace of the default message.1 Enter Menu mode and access Menu 900.2 Enter your desired message.• Press [CLR] to clear the entire message, if necessary.DISPLAY ILLUMINATIONYou can manually change the display illumination to suit thelighting conditions where you are operating.1 Enter Menu mode and access Menu 901.2 Set your desired brightness level from 1 to 8, or OFF.■ Auto Display BrightnessWhen Auto Brightness is activated, the display will light upevery time a key is pressed.1 Enter Menu mode and access Menu 902.2 Set the Auto Brightness function to ON or OFF.■ Backlight ColorYou can manually change the display illumination to suit thelighting conditions where you are operating.1 Enter Menu mode and access Menu 903.2 Set the backlight color to AMBER or GREEN.■ Display ContrastThe display visibility changes depending on the ambientconditions, for example between daytime and night. Whenyou fi nd the display is not clear, use this function to select theoptimum display contrast.1 Enter Menu mode and access Menu 904.2 Set your desired contrast level from 1 to16.Note: The display contrast may be affected by a change in temperature. Adjustthe contrast as necessary.■ Positive/ Negative ReversalYou can change the display status between Negative andPositive (default).1 Enter Menu mode and access Menu 905.2 Set the backlight color to NEGATIVE or POSITIVE.