Agilent Technologies E8663B, N5183A, N5181A/82A Generating an Internal FM Signal Using Visa and C

Programming Examples

GPIB Programming Interface Examples

printf("Example program to set up the signal generator\n"); printf("for an AC-coupled FM signal\n");

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

getch();

printf("\n");

viPrintf(vi, "*RST\n");	// Resets the signal generator
viPrintf(vi, "FM:SOUR EXT2\n");	// Sets EXT 2 source for FM
viPrintf(vi, "FM:EXT2:COUP AC\n");	// Sets FM path 2 coupling to AC
viPrintf(vi, "FM:DEV 20 kHz\n");	// Sets FM path 2 deviation to 20 kHz
viPrintf(vi, "FREQ 700 MHz\n");	// Sets carrier frequency to 700 MHz
viPrintf(vi, "POW:AMPL -2.5 dBm\n");	// Sets the power level to -2.5 dBm
viPrintf(vi, "FM:STAT ON\n");	// Turns on frequency modulation
viPrintf(vi, "OUTP:STAT ON\n");	// Turns on RF output
	// Print user information
printf("Power level : -2.5 dBm\n");
printf("FM state : on\n");
printf("RF output : on\n");

printf("Carrier Frequency : 700	MHZ\n");
printf("Deviation : 20 kHZ\n");
printf("EXT2 and AC coupling are selected\n");
printf("\n");	// Prints a carrage return
	// Close the sessions
viClose(vi);

viClose(defaultRM);

}

Generating an Internal FM Signal Using VISA and C

In this example the VISA library is used to generate an internal FM signal at a carrier frequency of 900 MHz and a power level of −15 dBm. The FM rate will be 5 kHz and the peak deviation will be 100 kHz. Launch Microsoft Visual C++ 6.0, add the required files, and enter the following code into your .cpp source file. visaex6.cpp performs the following functions:

•error checking

•resets the signal generator

•sets up the signal generator for FM path 2 and internal FM rate of 5 kHz

•sets up FM path 2 deviation to 100 kHz

•sets carrier frequency to 900 MHz

•sets the power level to - 15 dBm

•turns on frequency modulation and RF output

The following program example is available on the signal generator Documentation CD- ROM as visaex6.cpp.

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Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide 81