Agilent Technologies Agilent 8166A Manual de instrucciones descargar pdf (Pagina 201)

How to Co-ordinate Two Modules VISA Programming Examples

Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition 201

errStatus = viPrintf(vi,"SENS1:CHAN1:POW:REF:STATE:RATIO

TOREF,0\n");

checkError(vi,errStatus);

/* set reference measuremant state to absolute units */

errStatus = viPrintf(vi,"SENS1:CHAN1:POW:REF:STAT 1\n");

checkError(vi,errStatus);

/* turn laser on */

errStatus = viPrintf(vi,"SOURCE2:CHAN1:POW:STATE 1\n");

checkError(vi,errStatus);

/*ask for command completion */

{

errStatus = viQueryf(vi,"*OPC?\n","%d",&cmdDone);

checkError(vi,errStatus);

} while (!cmdDone);

/* set the power meter reference to the displayed value (display to

reference) */

errStatus = viPrintf(vi,"SENS1:CHAN1:POW:REF:DISP\n");

checkError(vi,errStatus);

read 30 values and display the result; after ten measurements

the source output will be halved by making use of the

attenuation;

after an other ten measurements the source output will be

halved

a second time;

because of the display to reference command and using the

reference, the value printed should be more or less equal to the

adjusted source attenuation */

for (i = 1; i <= 30; i++)

{

errStatus = viQueryf(vi,"READ1:CHAN1:POW?\n","%s",replyBuf);

checkError(vi,errStatus);

if(errStatus ==VI_SUCCESS)printf("power

#%02d:%s\n",i,replyBuf);

if(i == 10)

{

/* reduce the output power for 3.0 dB */

errStatus = viPrintf(vi,"SOURCE2:CHAN1:POW:ATT 3.0\n");

checkError(vi,errStatus);

}

if(i == 20)

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Agilent Technologies Agilent 8166A Manual de instrucciones Pagina 201