YOKOGAWA SL1400 - Page 559

App-9
IM 701240-01E
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App
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Index
Appendix
Creation of an ASCII Header File
If waveform data (waveform) is stored on a storage medium (such as a PC card), the
following two files are automatically created.
• Waveform display data file (.wvf)
• ASCII header file (.hdr)
The waveform data file can be recalled to the instrument using the FILE menu. The
ASCII header files explained here cannot be viewed on the SL1400. Use the data on a
PC for analysis.
1 Endian mode when saving data
Big: Motorola 68000-family data
Ltl: Intel 86 family data
2 Storage format of the binary waveform data
Trace: Grouped into blocks for each waveform.
Block: Grouped into blocks by a given time interval.
Trace is used on the SL1400.
3 Binary file start position
Offset from the beginning of the file.
4Maximum number of blocks in the group
Maximum number of blocks applies if the number of blocks varies between
waveforms.
5 Y-axis conversion equation for each waveform
Y-axis value = VResolution × raw data + VOffset
6 Data type
ISn: n-byte signed integer
IUn: n-byte unsigned integer
FSn: n-byte signed real number
FUn: n-byte unsigned real number
Bm: m-bit data
7 X-axis conversion equation for each waveform
X-axis value = HResolution × (Data No. – 1) + HOffset
Appendix 5 ASCII Header File Format