28 U8001A/U8002A User’s and Service Guide
3 Operations and Features
Keylock Operation
This operation provides locking function for the knob and all
the buttons on front panel of the equipment which allows end
users to secure their desired settings.
The keylock is disabled by default when power- up.
To enable keylock
1 Press on the “Lock/Unlock” button. The LOCK annunciator
will be turned on.
2 When the keylock function is enabled, the knob and all the
buttons are disabled EXCEPT “Lock/Unlock” button.
To disable keylock
1 Press and hold down the “Lock/Unlock” button for three
seconds.
2 When the “Lock/Unlock” button is being held down, the
display will show “HOLD” until the keylock is disabled.
3 After the keylock is disabled, the LOCK annunciator will be
turned off .
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