Maintenance
6–44
WFM 601A, WFM 601E, & WFM 601M Service Manual
The
option saves the current front-panel settings, presets, and calibration
information into the working directory in the file NVDATA.TXT and exits.
4. Rename NVDATA.TXT or move it into another directory to prevent the
Upgrade program from overwriting it.
Calibration information is unique to each waveform monitor. Make a separate
backup of the NVDATA.TXT file for each waveform monitor.
Loading NVDATA.TXT into NVRAM.
To load an existing NVDATA.TXT file into
NVRAM, use the following procedure. Loading the data file takes about two
minutes to complete. Loading the NVDATA.TXT saved from one instrument into
another instrument will result in second instrument being uncalibrated.
1. Ensure that the NVDATA.TXT file from your waveform monitor is in the
same directory as the Upgrade program files.
2. Verify the RS-232 configuration as shown in Figure 6–25 on page 6–38 and
Table 6–10, on page 6–38.
3. Exit from all applications on your PC.
4. From the DOS prompt, change to the directory containing the upgrade files.
5. Type
and press ENTER.
The
option attempts to reload the NVDATA.TXT file, but makes no other
changes to your waveform monitor.
6. When asked for the COM port, enter the number of the port you are using.
The Upgrade program now attempts to restore the information from
NVDATA.TXT to NVRAM.
In rare cases, the Upgrade program may quit prematurely; for example, if power
to the PC or the waveform monitor is interrupted, the RS-232 connection is
broken, or the Upgrade program is significantly delayed by another application.
If the Upgrade program quits prematurely, use the following procedure.
1. Save a copy of NVDATA.TXT into another file or location.
Saving a copy now will back up your presets and calibration information.
Leave a copy of NVDATA.TXT in the directory with the upgrade files. You
can use this copy to restore the settings to your waveform monitor.
2. Verify the RS-232 configuration as shown in Figure 6–25 on page 6–38 and
Table 6–10, on page 6–38.
Recovering from an
Interrupted or Failed
Upgrade
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