HP E4401B, Programmer'S Manual

Page: 89 / 398

Chapter 3 3-25
Programming Examples
Reading Trace Data using ASCII Format (HP-IB)
viStatus=viOpenDefaultRM(&defaultRM);
viStatus=viOpen(defaultRM,"GPIB0::18",VI_NULL,VI_NULL,&
viESA);
if(viStatus)
{
printf("Could not open a session to HP-IB device at
address 18!\n");
exit(0);
}
/*Clear the analyzer*/
viClear(viESA);
/*Reset the analyzer*/
viPrintf(viESA,"*RST\n");
/*Display the program heading*/
printf("\n\t\t : Read in Trace Data using ASCII format
(HPIB) Program \n\n" );
/*Check for the analyzer model number and route the
50 MHz signal accordingly*/
Route50MHzSignal();
/*Set the analyzer center frequency to 50 MHz*/
viPrintf(viESA,"SENS:FREQ:CENT 50 MHZ\n");
/*Set the analyzer to single sweep mode*/
viPrintf(viESA,"INIT:CONT 0 \n");
/*Trigger a sweep*/
viPrintf(viESA,"INIT:IMM; \n");
/*Read the operation complete query*/
viQueryf(viESA, "*OPC?\n", "%d", &lOpc);
if (!lOpc)
{
printf("Program Abort! error ocurred: last command
was not completed!\n");
exit(0);
}
/*Specify units in dBm*/
viPrintf(viESA,"UNIT:POW DBM; \n");
/*Set the analyzer trace data format to ASCII format*/
viPrintf(viESA,"FORM:DATA ASC; \n");