Agilent Technologies 86100A, Programmer'S Manual, Page: 68 / 366

2-14
Sample Programs
C Programming Examples
init_IO ( ); /* initialize device and interface */
/* Note: routine found in sicl_IO.c or natl_IO.c */
initialize ( ); /* initialize the scope and interface, and set up SRQ */
store_learnstring ( ); /* request learnstring and store */
change_setup ( ); /* request user to change setup */
get_learnstring ( ); /* restore learnstring */
close_IO ( ); /* close device and interface sessions */
/* Note: routine found in sicl_IO.c or natl_IO.c */
} /* end main */
/*
* Function name: initialize
* Parameters: none
* Return value: none
* Description: This routine initializes the analyzer for proper acquisition of data.
* The instrument is reset to a known state and the interface is cleared.
* System headers are turned off to allow faster throughput and immediate access to the data values requested by queries.
* Autoscale is performed to acquire a waveform. The signal is then
* digitized, and the channel display is turned on following the acquisition.
*/
void initialize ( )
{
write_IO ("*RST"); /* reset scope - initialize to known state */
write_IO ("*CLS"); /* clear status registers and output queue */
write_IO (":SYSTem:HEADer ON");/* turn on system headers */
/* initialize Timebase parameters to center reference, 2 ms full-scale (200 us/div), and 20 us delay */
write_IO (":TIMebase:REFerence CENTer;RANGe 5e-3;POSition 20e-6");
/* initialize Channel1 1.6v full-scale (200 mv/div); offset -400mv */
write_IO (":CHANnel1:RANGe 1.6;OFFSet -400e-3");
/* initialize trigger info: channel1 signal on positive slope at 300mv */
write_IO (":TRIGger:SOURce FPANel;SLOPe POSitive");
write_IO (":TRIGger:LEVel-0.40");
/* initialize acquisition subsystem */
/* Real time acquisition - no averaging; record length 4096 */
write_IO (":ACQuire:AVERage OFF;POINts 4096");
} /* end initialize ( ) */
/*
* Function name: store_learnstring
* Parameters: none
* Return value: none
* Description: This routine requests the system setup known as a learnstring.
* The learnstring is read from the scope and stored in a file called Learn2.
*/
void store_learnstring ( )
{