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YOKOGAWA ScopeCorder DL850E User Manual page 264

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Appendix
The data types are shown below.
Module/Data Type
2ch module, SCAN, temperature SCAN, Math, RMath
LOGIC
CAN, CAN/LIN
Bit data is stored in 16 bits. The bits are arranged in order from the least significant bit (bit 1 to bit 8), and the
highest 8 bits are not used.
Waveform Data
Waveform data begins DataOffset bytes into the file
Data is arranged in order by trace. The number of data points is indicated by BlockSize of each trace in the
waveform analysis information. The data size of each point is indicated by VDataType.
Due to different sampling rates on the measurement module, the number of data points may vary for each trace.
For waveform data saved using the "history all" feature, the data of all history entries is stored for each trace.
The history entries are arranged in order from the oldest to the most recent. The number of stored history
entries can be verified by BlockNumber in the waveform analysis information.
Data example saved for
one history entry
Trace -1
Trace -2
Trace -3
Trace -4
1 "DrAW" chunks hold waveform data ("dsRW" chunks hold dual capture waveforms).
A "DrAW" chunk contains "the data size in chunk" followed by the file data size (4 bytes) and file number (4
bytes). DataOffset points to the head of the raw data, which comes after these pieces of data.
In the case of a "dsRW" chunk (used in dual capturing), the head of the raw data comes immediately after "the
data size in chunk," and thus DataOffset (DHDR) also points to this position.
StartOffset
Sub channel data may not begin from the first point of the main channel data.
In such a case, it begins after the "start offset" of the main channel data.
Normally, this information does not need to be considered.
App-30
Bit Count
2 to16
2 to16
17 to 32
17 to 32
1 to 8
1
.
Data example saved
using "history all"
Trace -1
History –n
:
Trace -1
History –1
Trace -1
History –0
Trace -2
History –n
:
Trace -2
History –1
Trace -2
History –0
Value Type
−
−
Unsign
Sign
Unsign
Sign
−
Float
Logic
VDataType
IS2
B16
IU2
IS2
IU4
IS4
IS2
B16
IM DL850E-01EN
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