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4.Advanced User Guidebook
68
the USB memory device as an OTA file.
Data format description of OTA waveform file
If the source mode is set to Out1 or Out2, OTA file consists of two parts: the file header
and the channel data. If the source mode is set to Out1&Out2, OTA file consists of three
parts: file header, the first channel data, and the second channel data. The file header
represents the parameter of file data, which is expressed in "parameter name + value".
Each parameter name is a case-sensitive string of 4 bytes. The parameter value is at least
4 bytes.
1.Format description of the file header:
1) HEAD
Parameter
name
Meaning
Value
Comment
HEAD
Header size
4 bytes int
2) TYPE
Parameter
name
Meaning
Value
Comment
TYPE
Model
12 bytes char
3) BYTE
Parameter
name
Meaning
Value
Comment
BYTE
Data length in bit
4 bytes int
4) SIZE
Parameter
name
Meaning
Value
Comment
SIZE
File size
4 bytes int
Used to check the file
integrity
5) VOLT
Parameter
name
Meaning
Value
Comment
VOLT
Voltage division,
divided by 400 is
ADC resolution.
(When the source
mode is
Out1&Out2, it is
the first channel
voltage division.)
4 bytes float
The value indicates
voltage (the unit is mV),
such as 200 mV.
6) SAMP
Parameter
name
Meaning
Value
Comment
SAMP
Sample rate
4 bytes float
The unit is Sa/s.
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