Agilent Technologies Agilent 8166A Instrukcja Obsługi Pobierz pdf (Strona 191)

How to Use VISA Calls VISA Programming Examples

Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition 191

/* Initialize visa resource manger */

errStatus = viOpenDefaultRM (&defaultRM);

if(errStatus < VI_SUCCESS)

{ printf("Failed to open VISA Resource manager\n");

exit(errStatus);

}

/* Open session to GPIB device at address 20; the VI_NULL

parameters 3,4

are mandatory and not used for VISA 1.0*/

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

for zeroing or READ commands with averaging times greater than the

timeout */

errStatus = viSetAttribute(vi,VI_ATTR_TMO_VALUE,20000);

checkError(vi,errStatus);

/* get the identification string of the instrument mainframe*/

errStatus = viQueryf(vi,"%s\n","%t","*IDN?",replyBuf);

if(errStatus < VI_SUCCESS)

{ checkError(vi,errStatus); }

else printf("%s",replyBuf);

/* identify the installed modules */

errStatus = viQueryf(vi,"%s\n","%t","*OPT?",replyBuf);

if(errStatus < VI_SUCCESS)

{ checkError(vi,errStatus); }

else printf("%s",replyBuf);

/* get information about the available options of a slot */

errStatus = viQueryf(vi,"%s","%t","SLOT1:OPT?\n",replyBuf);

if(errStatus < VI_SUCCESS)

{ checkError(vi,errStatus); }

else printf("%s",replyBuf);

/*loop, until a key is pressed */

while(!scanf("%c",&c));

/*close the session */

viClose(vi);

}

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Agilent Technologies Agilent 8166A Instrukcja Obsługi Strona 191