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11
IM 701830-01E
Saving/Loading the Data/Connecting to the PC
Precautions to be taken when storing waveform data
• Storing is not possible while acquisition is in progress. To enable storing, press the
START/STOP
key to stop acquisition.
• Key operations, except for file key operations, can be performed even if storing is in progress.
• Storing is performed for all channels. It is not possible to select channels (by turning the display ON or
OFF).
• Waveform data are stored automatically into the DL_WAVE directory, with an extension identifier
“WVF” added. Header files (*.HDR), which are used for analysis of waveforms with a personal
computer, are also created in the DL_WAVE directory. However, these header files cannot be looked
at using this instrument. For a description of a header file, refer to Appendix 4.
• The maximum number of files that can be saved in a single directory is 1000.
Content of data load
• Previously saved waveform data. (But computational waveform data cannot be reloaded. Refer to
Appendix 4.)
When comparing with the loaded waveform
When waveform data are loaded from a file, all waveform data in the memory up to that point are cleared
and only the loaded waveform is displayed on the screen. By retaining this waveform on the screen using
the snap shot function and acquiring new data, you can compare the two waveforms.
If the loaded waveform data of a file contain one waveform, the data are placed in the “0” position of the
history memory.
If the loaded waveform data contain multiple waveforms (if multiple waveforms were acquired using the
accumulate/sequential store/history memory functions), all the waveforms are placed in the history
memory in order.
The newest waveform of the loaded data is placed in the “0” position, the next newest in the “-1” position,
the third newest in the “-2” position, and so on.
Precautions to be taken when loading waveform data
• Vertical-axis, horizontal-axis, and trigger settings in effect at the time of the save.
• Loading is not possible while acquisition is in progress. To enable recalling, press the
START/STOP
key to stop acquisition. When acquisition is restarted, the loaded waveform will be deleted (but will
still remain in the history memory).
• Cursor measurement, automatic measurement of waveform parameter, computation and expansion/
reduction operations can be performed on the loaded waveform.
• The waveform data resides in the DL_WAVE directory, with the extension identifier “WVF.” For the
file extension of the realtime recorded waveform data, see “Saving/Loading the realtime recorded
waveform data” below.
• The waveform data are composed of two files, a file with an extension .WVF (or .RTM) and a file with
an extension .HDR. Do not delete or rename these files such as on a PC. If you do so, you will not be
able to load the data.
Saving/Loading the realtime recorded waveform data
• If “the data range to save” on the previous page is set to “All”
All of the realtime recorded waveform data are saved. The file is saved with an “*.RTM” extension in
the “DL_WAVE” directory. “RTM” is displayed in the Model column of the file list. If you load the
“RTM” data, the data are loaded to the realtime record area (see page 1-14) not to the acquisition
memory. Therefore, all data points can be loaded.
• If “the data range to save” is set to “Main,” “Z1,” or “Z2”
The specified range of waveform data is saved. The file is saved with an “*.WVF” extension in the
“DL_WAVE” directory. The data that can be loaded are from the beginning to the maximum record
length (see appendix 2 “Relationship between the Record Length and Acquisition Mode”). If you load
the data that were saved using “Z1” or “Z2,” an incomplete waveform may be displayed because the
length is less than the record length.
Confirming the module configuration/record length of the file to load
You can confirm the module configuration/record length that existed at the time the data were saved. The
current module configuration is also listed. Furthermore, the channels that differ in the configuration
between the current and the saved data are indicated with red characters.
If the saved data are loaded in a condition in which the current module configuration is different from the
module configuration that existed when the data were saved, then correct waveforms are displayed only
for channels that have the save modules installed. Correct waveforms will not be displayed for channels
that have different modules installed. Moreover, the data cannot be loaded for channels that do not have
modules installed.
Note
The waveform data of each channel can also be stored in ASCII or floating point format. However, it is not
possible to display the waveform on the screen if it is stored in these formats. For details refer to page 11-13.
11.6 Saving/Loading Waveform Data
