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A/D data conversion
A/D data conversion converts analog voltage into digital information. The
following section illustrates the format of acquired raw data for the A/D
conversion.
Below is the illustrated example of the acquired raw data scan list for CH 101, CH
102, and CH 103.
#800000200
Data length indicator, The
next 8 bytes (0000 0200)
specifying the actual data
length only, not actual data.
Data length (200 bytes long)
16-bit Data Format
LSB
DDDD DDDD
12-bit Data Format
LSB
DDDD XXXX
D - Data bits
X - Unused bits
Raw data conversion
To convert the data into an actual float number, we need the voltage range and
polarity information. Below are the calculations on the raw data conversion for
both bipolar and unipolar.
To perform a sample calculation of the conversion, take the U2356A as an
example. The resolution of U2356A is 16 bits and the range is taken as 10 V. The
Int16b value calculated using conversion algorithm is 12768.
Keysight U2300A Series User's Guide
<byte>
<byte>
<byte>
1st data
1st data
1st data
MSB
LSB
LSB
CH 101
<byte>
<byte>
1st data
1st data
MSB
LSB
CH 102
CH 103
MSB
DDDD DDDD
MSB
DDDD DDDD
Features and Functions
<byte>
<byte>
<byte>
1st data
2nd data
2nd data
MSB
LSB
MSB
CH 101
3
...
...
...
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