Agilent Technologies E4438C - Page 62

Programming Examples
GPIB Programming Examples
Chapter 256
printf("used to save and recall an instrument’s state\n");
printf("\n");
viPrintf(vi, "*RST\n"); // Resets the signal generator
viPrintf(vi, "FREQ 5 MHz\n"); // Sets sig gen frequency
viPrintf(vi, "POW:ALC OFF\n"); // Turns ALC Off
viPrintf(vi, "POW:AMPL -3.2 dBm\n"); // Sets power for -3.2 dBm
viPrintf(vi, "OUTP:STAT ON\n"); // Turns RF output On
viPrintf(vi, "*OPC?\n"); // Checks for operation complete
while (!lngDone)
viScanf (vi ,"%d",&lngDone); // Waits for setup to complete
viPrintf(vi, "*SAV 1\n"); // Saves sig gen state to register #1
// Print user information
printf("The current signal generator operating state will be saved\n");
printf("to Register #1. Observe the state then press Enter\n");
printf("\n"); // Prints new line character
getch(); // Wait for user input
lngDone=0; // Resets the operation complete flag
viPrintf(vi, "*RST\n"); // Resets the signal generator
viPrintf(vi, "*OPC?\n"); // Checks for operation complete
while (!lngDone)
viScanf (vi ,"%d",&lngDone); // Waits for setup to complete
// Print user infromation
printf("The instrument is now in it’s Reset operating state. Press the\n");
printf("Enter key to return the signal generator to the Register #1
state\n");
printf("\n"); // Prints new line character
getch(); // Waits for user input
lngDone=0; // Reset the operation complete flag
viPrintf(vi, "*RCL 1\n"); // Recalls stored register #1 state
viPrintf(vi, "*OPC?\n"); // Checks for operation complete
while (!lngDone)
viScanf (vi ,"%d",&lngDone); // Waits for setup to complete
// Print user information
printf("The signal generator has been returned to it’s Register #1
state\n");
printf("Press Enter to continue\n");
printf("\n"); // Prints new line character
getch(); // Waits for user input
lngDone=0; // Reset the operation complete flag
viPrintf(vi, "*RST\n"); // Resets the signal generator
viPrintf(vi, "*OPC?\n"); // Checks for operation complete
while (!lngDone)
viScanf (vi ,"%d",&lngDone); // Waits for setup to complete
// Print user information
printf("Press Local on instrument front panel to return to manual mode\n");
printf("\n"); // Prints new line character
// Close the sessions
viClose(vi);
viClose(defaultRM);
}