Agilent Technologies N5183A MXG, N5181A/82A Creating and Storing I/Q Data-Little Endian Order

Creating and Downloading Waveform Files

Programming Examples

Creating and Storing I/Q Data—Little Endian Order

On the documentation CD, this programming example’s name is “CreateStore_Data_c++.txt.”

This C++ programming example (compiled using Metrowerks CodeWarrior 3.0) performs the following functions:

•error checking

•data creation

•byte swapping and interleaving for little endian order data

•binary data file storing to a PC or workstation

After creating the binary file, you can use FTP, one of the download utilities, or one of the C++ download programming examples to download the file to the signal generator.

#include	<iostream>
#include	<fstream>
#include	<math.h>
#include	<stdlib.h>
using namespace std;
int main	( void )
{
ofstream out_stream;		// write	the I/Q data to a file
const unsigned int SAMPLES =200;			// number of sample pairs in the waveform
const short AMPLITUDE = 32000;			// amplitude between 0 and full scale dac value
const double two_pi = 6.2831853;

//allocate buffer for waveform

short* iqData = new short[2*SAMPLES];// need two bytes for each integer if (!iqData)

{

cout << "Could not allocate data buffer." << endl; return 1;

}

out_stream.open("IQ_data");// create a data file if (out_stream.fail())

{

cout << "Input file opening failed" << endl; exit(1);

}

//generate the sample data for I and Q. The I channel will have a sine //wave and the Q channel will a cosine wave.

236 Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide