Sangean ATS-405 Manual page 23

Tuning Mute (T. MUTE)
If you prefer to mute the scan noise, you can select
Tuning Mute. The initial Tuning Mute is ON for all bands.
However for listeners who prefer not to miss any weak
transmissions during the tuning, you can disable tuning
mute function.
Tuning Mute can be set either radio is ON or OFF.
Press and hold Menu button until a beep sounds and
display Menu icon appears. Press Tuning Mute button 2,
display will first shows ON. Using the tuning UP/Down
button to select Tuning Mute ON or OFF, then press
ENTER button to complete the setting.
Soft Mute (S-MUTE)
Soft Mute is to reduce background noise during weak
signal, however it will also reduce radio reception. The
initial setting for Soft Mute is OFF.
Soft Mute can be set either radio is ON or OFF. Press
and hold Menu button until a beep sounds and display
Menu icon appears. Pressing Soft Mute button, display
will appear OFF. Using the tuning UP/Down button
to select Soft Tuning ON or OFF, then press ENTER
button to complete the setting.
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