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284 Keysight CXG, EXG, and MXG X-Series Signal Generators Programming Guide

Creating and Downloading Waveform Files

Programming Examples

uint64 sum_of_squares_accum = 0;

int ival;

int qval;

unsigned mag_squared;

double rmsDac;

unsigned i;

for (i=0; i<samples; i++)

{

ival = (int)(iq_data[i*2]);

qval = (int)(iq_data[i*2+1]);

mag_squared = (unsigned)(ival*ival) + (unsigned)(qval*qval);

sum_of_squares_accum += mag_squared;

}

// the rms in DAC counts (0 - 32768)

rmsDac = sqrt((double)sum_of_squares_accum / (double)samples);

// convert to normalized form (0 - 1.414).

return rmsDac * 2.0/(double)(DAC_MAX);

}

MATLAB Programming Examples

This section contains the following programming examples:

— “Creating and Storing I/Q Data” on page 284

— “Creating and Downloading a Pulse” on page 289

— “Downloading a Waveform, Markers, and Setting the Waveform Header”

on page 291

— “Playing Downloaded Waveforms” on page 299

Creating and Storing I/Q Data

On the documentation CD, this programming example’s name is

“offset_iq_ml.m.”

This MATLAB programming example follows the same coding algorithm as the

C++ programming example “Creating and Storing Offset I/Q Data—Big and

Little Endian Order” on page 254 and performs the following functions:

—error checking

—data creation

— data normalization

— data scaling

— I/Q signal offset from the carrier (single sideband suppressed carrier signal)

Keysight Technologies X Series Programming Guide

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