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Digital Oscilloscope Series
187
MATH:WF? DAT2
Response message:
The head of message: MATH:WF ALL. These are followed by the string
#9000000700, the beginning of a binary block in which nine ASCII
integers are used to give the length of the block (700 bytes). The point
number is 700 with interpolation. After the length of block, is beginning
of the wave data. ―0A 0A‖ means the end of data.
Step 2: Calculate the voltage value corresponding to the data point.
Using the formula: voltage value (V) = code value *(vdiv /25).
code value: The decimal of wave data. Different from the code of analog
channel waveform, it contains the offset.
Note: If the decimal is greater than ―127‖, it should minus 255.Then the
value is code value. Such as the wave data is ―FC‖ convert to decimal is
―252‖. So the code value is 252-255 = -3.
vdiv: The Volts/div value of math.
The picture above as an example:
Send command MTVD?
Return MTVD 1.00E+00V.
Get the current Volts/div values: vdiv = 1V.
According to the wave data, we can know the first point of waveform is
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