HP 8163A Programming Manual page 163

Programming Examples
How to Log Results
ViChar replyBuf[256]; /* buffer holding answers of the instrument */
ViChar c;
ViInt32 slot; /* slot number where the power meter is plugged */
ViInt32 chan; /* channel to be logged */
ViInt32 i; /* loop counter */
ViInt32 noOfValues;
ViReal64 averagingTime; /* aveaging time used in a logging cycle */
ViPChar replySubStr; /* pointer to a substring of the instruments reply */
ViInt32 noOfDigits;
to be read */
ViUInt32 retCnt;
errStatus = InitVisa(&vi);
if(errStatus < VI_SUCCESS)
{
exit(errStatus);
}
/* clear instrument error queue */
errStatus = viPrintf(vi,"*CLS\n");
checkError(vi,errStatus);
/* turn auto range on */
errStatus = viPrintf(vi,"SENS1:CHAN1:POW:RANGE:AUTO 1\n");
checkError(vi,errStatus);
/* send the command sequence for continuous logging */
slot = 1;
chan = 1;
noOfValues = 100; /* log 100 values */
averagingTime = 0.02; /* set averaging time to 20ms */
viPrintf(vi,"SENS%1d:CHAN%1d:FUNC:PAR:LOGG %d,%f\n",
slot,
chan,
noOfValues,
163
/* used in the keyboard wait loop */
/* number of values to be logged*/
/*number of digits, specifing the amount data
/* returns the number of bytes read calling viRead */