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Chapter 3 157
Programming Examples
Determine if an Error has Occurred
}
printf("\n");
}
/*Set the input port to 50MHz amplitude reference*/
void Route50MHzSignal()
{
viQueryf(viESA, "*IDN?\n", "%t", &cIdBuff);
iResult = (strncmp( cIdBuff, hpESA_IDN_E4401B, strlen(hpESA_IDN_E4401B)) &&
strncmp( cIdBuff, hpESA_IDN_E4411B, strlen(hpESA_IDN_E4411B)) && strncmp( cIdBuff,
hpEMC_IDN_E7401A, strlen(hpEMC_IDN_E7401A)));
if( iResult == 0 )
{
/*Set the input port to the 50MHz amplitude reference for the models*/
/*E4401B, E4411B and E7401A*/
viPrintf(viESA,"CAL:SOUR:STAT ON \n");
}
else
{
/* For the analyzers having frequency limits >= 3GHz, prompt the user*/
/* to connect the amplitude reference output to the input*/
printf ("Connect AMPTD REF OUT to the INPUT \n");
printf ("......Press Return to continue \n");
scanf( "%c",&cEnter);
/*Externally route the 50MHz Signal*/
viPrintf(viESA,"CAL:SOUR:STAT ON \n");
}
}
/*Interrupt handler,trigger event handler */
ViStatus _VI_FUNCH sSrqHdlr(ViSession viESA, ViEventType eventType, ViEvent
ctx,ViAddr userHdlr)
{
ViUInt16 iStatusByte=0;
long lCond = 0L;
/* Make sure it is an SRQ event, ignore if stray event*/
if (eventType!=VI_EVENT_SERVICE_REQ)
{
printf ("\n Stray event type0x%1x\n",eventType);
/*Return successfully*/
return VI_SUCCESS;
}