HP ESA-E Series Programmer's Manual page 108

Programming Examples
Creating a Limit Line
/*Set the analyzer to a center frequency of 50 MHz, span
to 20 MHz, and resolution bandwidth to 1 MHz.*/
viPrintf(viESA,"SENS:FREQ:CENT 50e6\n");
viPrintf(viESA,"SENS:FREQ:SPAN 20e6\n");
viPrintf(viESA,"SENS:BWID:RES 10e5\n");
/*Set the analyzer reference level to 0 dBm*/
viPrintf(viESA,"DISP:WIND:TRAC:Y:SCAL:RLEV 0 \n");
/* Check for the analyzer model number and route the 50
MHz signal accordingly*/
Route50MHzSignal();
viPrintf(viESA,"INIT:IMM; \n");
/*Check for operation complete */
viQueryf(viESA, "*OPC?\n", "%d", &lOpc);
if (!lOpc)
{
printf("Program Abort! error ocurred: last command was
not completed!\n");
exit(0);
}
/*Check to see if limit line passes or fails. It should
pass.*/
printf ("Limit Line status after activating the 50MHZ
signal \n");
printResult();
/*Pause for 5 seconds*/
YIELD;
/*Deactivate the 50 MHz alignment signal.*/
viPrintf(viESA,"CAL:SOUR:STAT OFF \n");
/*Trigger a sweep*/
viPrintf(viESA,"INIT:IMM; \n");
/*Check for operation complete*/
viQueryf(viESA, "*OPC?\n", "%d", &lOpc);
if (!lOpc)
{
printf("Program Abort! error ocurred: last command was
not completed!\n");
exit(0);
}
3-44 Chapter 3