App-17
IM 701450-01E
App
Appendix
Creation of ASCII Header File
When waveform data (Waveform) is stored to a floppy disk, the following two files will be
created automatically in the DL_WAVE directory.
• 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 DL7400. Use the data such
as when analyzing the waveforms on your PC.
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: Groups into blocks, each block for a single waveform.
Block: Groups into blocks, each block for a given time interval.
The DL7400 supports only the Trace format.
3 Binary file start position
Offset from the beginning of the file
4 Maximum number of blocks in the group
Maximum number of blocks applies if the number of blocks varies between
waveforms.
5Y 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
7X axis conversion equation for each waveform
X axis value = HResolution × (Data No. – 1) + HOffset
Appendix 3 ASCII Header File Format
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