34Basic OperationMiscellaneous Settings4 Turn the O knob to select “3 AUDIO”.5 Press the M key briefly.6 Turn the O knob to select “2 MUTE”.7 Press the M key briefly.8 Turn the O knob to select a muting level.Remarks You can select one of the following four muting levels:• MUTE 30%• MUTE 50%• MUTE 100%• OFFThe larger the value, the smaller the sound.To deactivate the muting function, select OFF.9 Press the M key over 1 second.10 Press theM key over 1 second again.The Set mode is canceled.Remarks When the muting function is activated, the ] icon isdisplayed on the LCD.When the muting function is being performed (sound isbeing muted actually), the ] icon blinks on the LCD.Hint• When no signal is received on the operating band even if the muting function is activated, sound isnot muted.Changing the Transmission Power LevelThe maximum transmission power of the FT1DR is 5 W. When communicating with afriend in the immediate area or you want to suppress battery power consumption, youcan lower the transmission power. For power supply types and transmission powerlevels, see the table shown below.1 Press the F key briefly, and the press the 1 key briefly.f is displayed on the LCD.Select your desired transmission power level while f is displayed. The icon andPO meter which correspond to the selected transmission power level appear.The current power level is displayed, for about 2 seconds, in the area where afrequency is displayed.Example: HIGH POWERBattery type H (High power) L3 L2 L1Battery pack5W 2.5W 1W 0.05WExternal power supply(13.8 VDC)Battery case(alkaline batteries) 1W 0.05W
