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Agilent E1441A Application Information 59
Chapter 2
/* Set the output amplitude to be set for 50 ohm load. */
err=viPrintf(funcgen, "OUTPut:LOAD 50\n");
if(err != VI_SUCCESS) err_handler(funcgen, err);
/* configure the E1441A to output a 5 Vp-p, 5 kHz sine wave */
/* with a 2.5V offset */
err=viPrintf(funcgen, "SOURce:APPLy:SIN 5000, 2, 2.5\n");
if(err != VI_SUCCESS) err_handler(funcgen, err);
/* set the burst modulation source, set 10,000 burst cycles, */
/* a 270 degree starting phase, a 1 Hz burst rate, enable */
/* the burst state, and output the burst when a negative */
/* going trigger is received on "EXT TRIG" BNC connector */
err=viPrintf(funcgen, "SOURce:BM:SOURce INTernal\n"); /* counted burst mode */
if(err != VI_SUCCESS) err_handler(funcgen, err);
err=viPrintf(funcgen, "SOURce:BM:NCYCles 10000\n"); /* 10000 cycle bursts */
if(err != VI_SUCCESS) err_handler(funcgen, err);
err=viPrintf(funcgen, "SOURce:BM:PHASe 270\n"); /* 270 degree phase */
if(err != VI_SUCCESS) err_handler(funcgen, err);
err=viPrintf(funcgen, "TRIGger:SOURce EXTernal\n"); /* "EXT" trig BNC */
if(err != VI_SUCCESS) err_handler(funcgen, err);
err=viPrintf(funcgen, "TRIGger:SLOPe NEG\n"); /* "trigger on negative edge */
if(err != VI_SUCCESS) err_handler(funcgen, err);
err=viPrintf(funcgen, "SOURce:BM:STATe ON\n"); /* enable burst mode */
if(err != VI_SUCCESS) err_handler(funcgen, err);
/* Now short "EXT TRIG" BNC connector to start 2 second burst */
/* 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);
/* close the device session */
viClose(funcgen);
} /* end of main */
/*** Error handling function ***/
void err_handler(ViSession funcgen, ViStatus err)
{
char buf[1024] = {0};
viStatusDesc(funcgen, err, buf);
printf("ERROR = %s\n", buf);
return;
}