Agilent Technologies user service Agilent E1441A Application Information, Chapter

/* define pi for sin(x)/x calculation, initalize other variables */ pi = 3.141592654;

max_v = 0; idx = 0;

/* do this for Borland EasyWin programs */

#if defined(__BORLANDC__) && !defined (__WIN32__) _InitEasyWin();

#endif

/* Open resource manager and Function Generator sessions*/ err=viOpenDefaultRM(&defaultRM);

if(err != VI_SUCCESS) err_handler(funcgen, err);

err=viOpen(defaultRM, DEVICE_ADDRESS, VI_NULL, VI_NULL, &funcgen); if(err != VI_SUCCESS) err_handler(funcgen, err);

/* Set the timeout value to 10 seconds. */ viSetAttribute(funcgen, VI_ATTR_TMO_VALUE, 10000);

/* compute sin(x)/x waveform */ for (i=-2047; i<2048; i++)

{

j = (ViReal64)i; if(i==0) j=1.E-38;

sinxwave[i+2048] = ((sin(2*pi*0.53125*j/256))/(0.53125*j/256)*0.159154943092);

}

/* download the computed waveform into E1441A volatile memory */ err = viPrintf(funcgen,"DATA VOLATILE");

for ( i=0; i < 4096; i++ )

{

err = viPrintf( funcgen, ",%f", sinxwave[i] );

}

err = viPrintf(funcgen,"\n");

if(err != VI_SUCCESS) err_handler(funcgen, err);

/* copy the arbitrary waveform data from volatile memory to a */

/* named non-volatile memory location*/ err=viPrintf(funcgen, "DATA:COPY MYSINE\n");

if(err != VI_SUCCESS) err_handler(funcgen, err);

/* select the user defined arbitrary waveform by name */ err=viPrintf(funcgen, "SOURce:FUNCtion:USER MYSINE\n"); if(err != VI_SUCCESS) err_handler(funcgen, err);

/* configure the E1441A to output a 5 Vp-p, 5 kHz arb wave */ /* APPly command is first since it sets some functions that */

/* follow*/ err=viPrintf(funcgen, "SOURce:APPLy:USER 5000, 5, 0\n"); if(err != VI_SUCCESS) err_handler(funcgen, err);

/* Check for system errors. */ err=viQueryf(funcgen, "syst:err?\n", "%t", buf); if(err != VI_SUCCESS) err_handler(funcgen, err); printf("System error response = %s\n\n", buf);

62 Agilent E1441A Application Information Chapter 2