Keysight Technologies X-Series, Руководство по программированию

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240 Keysight CXG, EXG, and MXG X-Series Signal Generators Programming Guide
Creating and Downloading Waveform Files
Creating Waveform Data
To download the data created in the above example, see “Using Advanced
Programming Languages” on page 243 .
Line Code—Interleaving I and Q data for Big Endian Order
20
21
22
23
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short iqbuffer[NUMSAMPLES*2];
for(index=0; index<numsamples; index++)
{
iqbuffer[index*2] = idata[index];
iqbuffer[index*2+1] = qdata[index];
}
return 0;
Line Code Description—Interleaving I and Q data for Big Endian Order
20 Define a 16–bit integer (short) array to store the interleaved I and Q data. The array size increases by two times
to accommodate two bytes of I data and two bytes of Q data.
NOTE
In rare instances, a compiler may define short as larger than 16 bits. If this
condition exists, replace short with the appropriate object or label that defines a
16–bit integer.
21–25 Create a loop to do the following:
— Store the I data values to the I/Q array location [ index *2].
— Store the Q data values to the I/Q array location [ index *2+1].
1 0 1 1 0 1 1 1
15...................... 8
Data
Bit Position
Interleaved I/Q Array in Big Endian Order
1 1 1 0 1 0 0 1
7.................... 0
1 1 1 0 0 1 0 1
15...................... 8
0 1 1 0 1 0 1 1
7.................... 0
I Data Q Data