Maintenance
WFM 601A, WFM 601E, & WFM 601M Service Manual
6–43
11. If you replaced the Main board or were not able to save the calibration
information before repair, perform the procedures in the Adjustment
Procedures section of this manual.
When you load software into the empty EPROM, the program loads default
calibration information into NVRAM. You must perform the full Adjustment
Procedure in order to adjust the default calibration information. This
adjustment will ensure that your waveform monitor meets the advertised
specifications. You can choose to return the waveform monitor to your
Tektronix Service Center for a complete calibration.
12. After repairing or replacing the Main board, verify that the waveform
monitor still performs to specifications by performing the procedures in the
Performance Verification section of this manual.
This completes the configuration procedure.
During the upgrade process, the Upgrade program saves user presets and
calibration information from your waveform monitor NVRAM to a temporary
file named NVDATA.TXT. After the program loads the new software, it
automatically reloads the presets and calibration information from
NVDATA.TXT back into NVRAM. This process configures your waveform
monitor with the operating parameters it had before you ran the Upgrade
program. Before exiting the upgrade, and after ensuring that NVDATA.TXT was
loaded correctly, the program deletes NVDATA.TXT.
If the NVDATA.TXT file is lost, you can recalibrate the waveform monitor by
using the Adjustment Procedures in this manual. Alternatively, if you have saved
a copy of the NVDATA.TXT file, you can load the contents of NVDATA.TXT
into the waveform monitor using the UPGRADE –R option described in
Reloading NVDATA.TXT on page 6–45. Each waveform monitor has unique
calibration information in its NVRAM. Loading the NVDATA.TXT saved from
one instrument into another instrument will result in second instrument being
uncalibrated.
Backing up Calibration Information and Presets.
If NVRAM fails, your waveform
monitor can lose calibration information and stored presets. To ensure that you
retain the calibration information, you can copy the NVRAM data into the
NVDATA.TXT file using the following procedure. This procedure takes about
two minutes.
1. Exit from all applications on your PC.
2. From the DOS prompt, change to the directory containing the upgrade files.
3. Type
and press ENTER.
Using NVDATA.TXT
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