
To clear error messages
If any Fail message appears on the display after cycling power:
a Press any menu key and cycle the power on the oscilloscope again.
b Hold the menu key down until the message "Key-down power-up executed"
or "Keydown power sequence initiated ..." is displayed.
c If the original fail message still appears, contact your Agilent Service Center
for diagnosis and repair.
Setup memories and trace memories are cleared after a keydown powerup is
performed.
One or more of the following error messages may appear on the display
(within the graticule space) as a result of internal NVRAM (non-volatile
random access memory.)
1
If the message "Vertical Cal factors failed checksum
test–defaults loaded
" appears on screen, go to "To perform the
self-calibration" on page 4–25 , perform steps 1 through 5, then
continue to steps below.
This message means that the vertical calibration factors which were stored in
NVRAM along with a checksum have been corrupted. This information is
written into NVRAM when a vertical self-calibration is run. During powerup,
the checksum is recomputed and compared to the one saved when the
vertical calibration factors were saved. If the checksums do not match, the
error message is displayed.
a Cycle the power on the oscilloscope.
b If default vertical calibration factors are loaded and error messages
remain, contact you Agilent service center for diagnosis and repair.
Service
Troubleshooting the Oscilloscope
4–37
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