KARL DEUTSCH LEPTOSKOP 2042 Instruction Manual page 28

10.5.4 Backlight
Controls the backlight of the display.
Off:
Normal:
Bright:
If options Normal or High are selected: After about 60 s idling the backlight
is switched off. A measurement or a keystroke will switch the backlight on
again.
Due to the higher current consumption the battery lifetime of the
LEPTOSKOP 2042 is reduced with active backlight.
If the interface is connected to an external USB socket, the USB
power line is used to supply the instrument. In this case the backlight
will not switch off.
The selected level of backlight which is active during switch-off of the
instrument becomes memorized and is restored when it is switched on
again.
10.5.5 Volume
For acoustic monitoring you can select whether and at which volume signal
tones are generated.
Off:
Low:
High:
Instruction Manual LEPTOSKOP 2042
28
The backlight intensity is at its minimum. With dark envi-
ronment the residual intensity is sufficient to activate the
backlight via this menu topic.
The backlight is on with brightness.
The backlight is active at its maximum intensity.
no signal tone
low signal tone
high signal tone
Art. No. 7423.421