Specifications

To clear error messages
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 the screen, go to "To perform
the self-calibration," perform steps 1 through 5, then continue the
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 your HP service center for diagnosis and repair.
2
If the message "
Horizontal cal factors failed
checksum–defaults loaded
," appears on screen, go to "To perform
the self-calibration" and perform the self-calibration for your
instrument, then continue to steps below.
This message means that the horizontal delay calibration factors which were
stored in NVRAM along with a checksum have been corrupted. This
information is written into NVRAM when the horizontal delay calibration is
run. During powerup, the checksum was recomputed and compared against
the one saved when the horizontal delay calibration factors were saved. If
the checksums do not match, the error message is displayed.
a
Cycle the power of the oscilloscope.
b
If default horizontal delay calibration factors are loaded, and error
messages remain, contact your HP service center for diagnosis and
repair.
Testing, Adjusting, and Troubleshooting
To clear error messages
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