Keysight U1253B Guía Del Usuario Y Servicios página 187

6 Performance Tests and Calibration
Figure 6-6
186
Without entering code,
press View > 1 second
Press or
to select digit
Press or
to edit selected digit
Press Save when done
Last 4 digit of
serial number
is correct
Resetting security code to factory default
To exit without resetting the code
press View > 1 second
Error message appears for 3 sec.
Last 4 digit of
serial number
is incorrect
The word "PASS" appears
for 3 seconds
Keysight U1253B User's and Service Guide