To Next Page

To Previous Page

VISA Programming Examples How Power Varies with Wavelength

204 Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition

errStatus = viOpen (defaultRM, "GPIB::20::INSTR",

VI_NULL,VI_NULL,&vi);

if(errStatus < VI_SUCCESS)

{

printf("Failed to open instrument\n");

exit(errStatus);

}

/*set timeout to 20 sec; this should work for all commands

except zeroing */

errStatus = viSetAttribute(vi,VI_ATTR_TMO_VALUE,20000);

checkError(vi,errStatus);

errStatus = viPrintf(vi,"*CLS\n");

checkError(vi,errStatus);

/* read the minimum wavelength from the tunable laser source*/

errStatus = viQueryf(vi,"SOURCE2:WAV? MIN\n","%s",replyBuf);

checkError(vi,errStatus);

/* save this wavelength */

wavelength = atof(replyBuf);

/* set the minimum wavelength as initial wavelength in the tunable

laser source */

errStatus = viPrintf(vi,"SOURCE2:WAV %s\n",replyBuf);

checkError(vi,errStatus);

/* set the power meter to same wavelength like the tunable laser

source */

errStatus = viPrintf(vi,"SENS1:CHAN1:POW:WAV %s\n",replyBuf);

checkError(vi,errStatus);

/* read the maximum wavelength from the tunable laser source */

errStatus = viQueryf(vi,"SOURCE2:WAV? MAX\n","%s",replyBuf);

checkError(vi,errStatus);

/*save this wavelength */

wavelength_max = atof(replyBuf);

/* change the power unit of the power meter to dbm */

errStatus = viPrintf(vi,"SENS1:CHAN1:POW:UNIT DBM\n");

checkError(vi,errStatus);

Agilent Technologies 8166B Programming Guide

Other manuals for Agilent Technologies 8166B