Keysight U1271A - Changing the Auto Power-Off and Backlight Timeouts; Figure 4-7 Dbref Display

4 Multimeter Setup Options
Setup Menu Items
138 U1271A/U1272A User’s Guide
To change the dBm reference impedance value:
1 Press for more than 1 second to enter the
multimeter’s setup menu.
2 Press or until is shown on the
secondary display.
Figure 4-7 dbrEF display
3 Press or to set the dBm reference impedance
value.
4 Press to save your changes or press to
discard your changes.
5 Press and hold until the multimeter restarts to return
to normal operation.
Changing the auto power-off and backlight timeouts
The multimeter’s automatic power- off (see page 26) and
backlight (see page page 27) features use timers to
determine when to turn off the backlight and when to
automatically turn the multimeter off.
Setup
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Setup
Parameter Range Default setting
APo (1 to 99) minutes or Off 15 minutes
bLit (1 to 99) s or Off 15 s