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