Agilent-technologies N5183A MXG Manual de usuario descargar pdf (Pagina 87)

Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide 77

Programming Examples

GPIB Programming Interface Examples

viScanf(vi, "%t", rdBuffer); // Reads response into rdBuffer

// Prints the source frequency

printf("Source CW frequency is : %s\n", rdBuffer);

printf("Press any key to continue\n");

printf("\n"); // Prints new line character to the display

getch();

viPrintf(vi, "POW:AMPL?\n"); // Querys the power level

viScanf(vi, "%t", rdBuffer); // Reads the response into rdBuffer

// Prints the source power level

printf("Source power (dBm) is : %s\n", rdBuffer);

printf("Press any key to continue\n");

printf("\n"); // Prints new line character to the display

getch();

viPrintf(vi, "FREQ:MODE?\n"); // Querys the frequency mode

viScanf(vi, "%t", rdBuffer); // Reads the response into rdBuffer

// Prints the source freq mode

printf("Source frequency mode is : %s\n", rdBuffer);

printf("Press any key to continue\n");

printf("\n"); // Prints new line character to the display

getch();

viPrintf(vi, "OUTP OFF\n"); // Turns source RF state off

viPrintf(vi, "OUTP?\n"); // Querys the signal generator's RF state

viScanf(vi, "%1i", &num); // Reads the response (integer value)

// Prints the on/off RF state

if (num > 0 ) {

printf("Source RF state is : on\n");

}else{

printf("Source RF state is : off\n");

}

// Close the sessions

viClose(vi);

viClose(defaultRM);

}

Generating a CW Signal Using VISA and C

This example uses VISA library functions to control the signal generator. The signal generator is set

for a CW frequency of 500 kHz and a power level of −2.3 dBm. Launch

Microsoft Visual C++ 6.0, add the required files, and enter the code into your .cpp source file.

visaex4.cpp performs the following functions:

• verifies the GPIB connections and interface are functional

• resets the signal generator

• queries the instrument (CW frequency, power level, frequency mode, and RF state)

• reads responses into the rdBuffer (CW frequency, power level, and frequency mode)

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