HP ESA-E Series - Example; Reading Trace Data Using 32-Bit Real Format (HP-IB)

Chapter 3 3-27
Programming Examples
Reading Trace Data Using 32-bit Real Format (HP-IB)
Reading Trace Data Using 32-bit Real Format
(HP-IB)
This C programming example does the following:
• Open an HP-IB session at address 18.
• Clear the analyzer.
• Reset the analyzer.
• Set the input port to the 50 MHz amplitude reference
• Set analyzer to single sweep
• Set the analyzer to 50 MHz Center frequency and span
• Specify dB per division of each vertical division and units
• Set analyzer trace data format to 32-bit Real
• Set the binary byte order to SWAP
• Trigger a sweep
• Read the operation complete query
• Get trace and header data, in this case we know its 1701 bytes
• Extract the number of bytes from the trace header
• Extract the trace data
• Save trace data to an ASCII file
• Close the session
Example:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <conio.h>
#include <ctype.h>
#include <string.h>
#include "visa.h"
#define hpESA_IDN_E4401B "Hewlett-Packard, E4401B"
#define hpESA_IDN_E4411B "Hewlett-Packard, E4411B"
ViSession defaultRM, viESA;
ViChar cIdBuff[256]={0};
char cEnter =0;
int iResult =0;
/*Set the input port to the 50 MHz amplitude reference*/