Using the Scope Functions  3
Agilent U1602B/U1604B User’s and Service Guide  97
Mute Function
This Mute function allows you to turn on and off the key sound and low 
battery alarm alert. To access this function, follow the steps below:
1 Press  User,  then  F4 softkey to access Utility mode.
2 On page 4/4 of the Utility menu,  press F1 to display the mute on/off 
menu. 
3 Select  Mute On to turn off the key sound and low battery alarm alert 
and vice- versa.