Chapter 2 63
Programming Examples
GPIB Programming Examples
viPrintf(vi, "LIST:TYPE STEP\n");// Sets sweep to step
viPrintf(vi, "LIST:TRIG:SOUR IMM\n");// Immediately trigger the sweep
viPrintf(vi, "LIST:MODE AUTO\n");// Sets mode for the list sweep
viPrintf(vi, "FREQ:STAR 40 MHZ\n"); // Start frequency set to 40 MHz
viPrintf(vi, "FREQ:STOP 900 MHZ\n");// Stop frequency set to 900 MHz
viPrintf(vi, "SWE:POIN 25\n");// Set number of points for the step sweep
viPrintf(vi, "SWE:DWEL .5 S\n");// Allow .5 sec dwell at each point
viPrintf(vi, "INIT:CONT OFF\n");// Set up for single sweep
viPrintf(vi, "TRIG:SOUR IMM\n");// Triggers the sweep
viPrintf(vi, "INIT\n"); // Takes a single sweep
printf("\n");
// While the instrument is sweeping have the
// program busy with printing to the display.
// The Sleep function, defined in the header
// file windows.h, will pause the program
// operation for .5 seconds
while (sweep==1){
printf("*");
Sleep(500);}
printf("\n");
// The following lines of code will stop the
// events and close down the session
viStatus = viDisableEvent(vi, VI_ALL_ENABLED_EVENTS,VI_ALL_MECH);
viStatus = viUninstallHandler(vi, VI_EVENT_SERVICE_REQ, interupt,
rdBuffer);
viStatus = viClose(vi);
viStatus = viClose(defaultRM);
return 0;
}
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