Fluke PM6681, PM6685 17 ‘C’ for National Instruments PC-IIA, Frequency Profiling, Capture Profile

Programming Examples

ibwrt(Counter, “:INP:LEV:AUTO ONCE”, 18); ibwrt(Counter, “:DISP:ENAB OFF; :ACQ:APER 1E-6", 30);

ArmDelay=200e-9;

/*CAPTURE PROFILE*/

Printf(”Profiling”);

for (i=0; i<1000; i++) { /*Set arming delay time*/ sprintf(ArmString, “:ARM:DEL %le”, ArmDelay); ibwrt(Counter, ArmString, strlen(ArmString));

/*Measure and read result*/ ibwrt(Counter, “READ?”, 5); ibrd(Counter, InString, 80); InString[ibcnt] = ‘\0’;

/*Write arming delay time and result to file*/ fprintf(ofp, “%le, %s”, ArmDelay, InString);

/*Increase arming delay*/ ArmDelay += 100e-9;

}

ibwrt(Counter, “:DISP:ENAB ON”, 13);

/*Close file*/ Fclose(ofp);

}else

printf(“CANT OPEN FILE”);

exit(0);

}

4-17 ‘C’ for National Instruments PC-IIA, Frequency Profiling