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4.Advanced User Guidebook
62
To save the waveform to internal memory, select Storage in the right menu
as Internal. Turn the M knob to select an object in the left menu, select Save
in the right menu.
To save the waveform onto a USB memory device, insert a USB memory
device into the port on the front panel. If the icon appears on the top right
of the screen, the USB memory device is installed successfully. If the USB
memory device cannot be recognized, format the USB memory device
according to the methods in "USB disk Requirements" on P53. Select Storage
in the right menu as External. Select Save in the right menu. An input
keyboard used to edit the file name will pop up. The name is default as current
system date and time. Turn the M knob to select the keys, push the knob to
input. Select the key in the keyboard to confirm. The cloned waveform
will be saved onto the USB memory device as a file with the ota suffix.
Data format description of OTA waveform file
If the source is CH1 or CH2, OTA file consists of two parts: the file header and the data. If the
source is CH1&CH2, OTA file consists of three parts: file header, CH1data, and CH2 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 is
CH1&CH2, it is CH1
voltage division.)
4 bytes float The value indicates voltage
(the unit is mV), such as 200
mV.
6) SAMP
Parameter name Meaning Value Comment
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