CMU Program Examples
1100.4903.12 7.1 E-4
7 Remote Control – Program Examples
The program examples in this chapter are intended to give a short introduction to GPIB bus
programming of the CMU illustrating some of the concepts discussed in Chapter 5. For examples
involving optional function groups (network tests) refer to the relevant manuals, e.g. CMU-K21/-K22/-
K23.
Secondary Address Handling
The following example explains how to handle primary and secondary addressing and how to perform a
simple measurement with the CMU. In the example, remote control via the National Instruments GPIB
bus driver (NI-488.2) and the programming language C is used. Once the addresses are assigned, the
same commands can be used in different function groups.
// Include header files
#include <string.h>
/* NI488.2 header file */
#include <decl.h>
// GPIB board index
#define BdIndx 0
// Primary address
#define pad 20
// Secondary address for Base Definition (National Instruments specific)
#define sad_BASE 96
// Secondary Address for function groups definition
// (conforming to IEEE488.2)
#define _RF_NSig 1
#define _GSM900MS_Sig 2
#define _GSM900MS_NSig 3
#define _GSM1800MS_Sig 4
#define sad_RF_NSig sad_BASE + _RF_NSig
#define sad_GSM900MS_Sig sad_BASE + _GSM900MS_Sig
#define sad_GSM900MS_NSig sad_BASE + _GSM900MS_NSig
#define sad_GSM1800MS_Sig sad_BASE + _GSM1800MS_Sig
// Timeout
#define tmo (int) 10
// EOT
#define eot (int) 1
// EOS
#define eos (int) 0
// Command definition for secondary address mapping
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