Agilent Technologies E8663B, N5181A/82A, N5183A MXG Generating a CW Signal Using Visa and C

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)

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