12-20
IM 253710-01E
Explanation
CAUTION
Never remove the medium (disk) or turn OFF the power while the access
indicator or the
mark is blinking. It can damage the medium or destroy the
data on the medium.
Selecting the data type, file extension, data size
Select the data type from the following list of choices. The file extension is
automatically attached to the file name.
• Binary
• The sampled data in the acquisition memory are saved in binary format.
• The data that are saved by selecting [Main] in “Selecting the range of the
waveform to be saved” (described later) can be loaded to display the waveform
and calculate numerical data.
• A header file is automatically created. The header file is used when analyzing
the waveform on a PC. The header file cannot be opened using this instrument.
For the header file format, see Appendix 5, “ASCII Header File Format.”
• ASCII
• The sampled data in the acquisition memory are saved in ASCII format. The
data can be used to analyze the waveform on a PC.
• Data in this format cannot be loaded on this instrument.
• Float
• The sampled data in the acquisition memory are saved in 32-bit floating point
format. The data can be used to analyze the waveform on a PC.
• Data in this format cannot be loaded on this instrument.
Data size
• For the normal measurement mode
The following table shows the data size when the waveform data of CH1 to CH8
are saved with a record length of 100 k-words, observation time of 100 ms, and
MATH1 and MATH2 turned OFF.
Data Type
Extension
Data Size (Bytes)
Binary
.WVF
Approx. 1.7 M (100 k-words
×
8 channels
×
2)
.HDR
Approx. 7 K (approx. 8 K when Math1 and Math2 are ON)
ASCII
.CSV
Approx. 9 M (depends on the input signal conditions)
Takes tens of minutes to save the data.
Float
.FLD
Approx. 400 K (100 k
×
4)
• For the harmonic measurement mode
Same as in the normal measurement mode.
Waveforms that are saved
• When the data type is [Binary] or [ASCII], the displayed waveform is saved.
• When the data type is [Float], the selected waveform from CH1 to CH8, MATH1,
and MATH2 can be saved.
• The setup parameters of the waveform, such as the vertical axis, the horizontal
axis, and the trigger are also saved.
• To reproduce the computation result, [Binary] data of all channels are necessary.
Save the data with the display of all channels turned ON.
12.6 Saving and Loading Waveform Data