Ceyear 4051 Series, User Manual

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6 Remote control
6.3 Basic Programming Method of VISA Interface
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// initialize the controller: open the default resource manager and return the instrument handle to the analyzer.
/*************************************************************************/
void InitController()
{
ViStatus status;
status = viOpenDefaultRM(&defaultRM);
status = viOpen(defaultRM, analyzerString, VI_NULL, VI_NULL, &analyzer);
}
6.3.3 Instrument Initialization
/*************************************************************************/
The following example shows the initialization of the default instrument state and clearing of the status
register.
/*************************************************************************/
void InitDevice()
{
ViStatus status;
long retCnt;
status = viWrite(analyzer, ―*CLS‖, 4, &retCnt); //reset status register
status = viWrite(analyzer, "*RST", 4, &retCnt); //Reset instrument
status = viWrite(analyzer, ":INST:SEL SA", 12, &retCnt); //Set instrument operating mode (with commands
of the signal/spectrum analyzer as an example)
}
6.3.4 Sending of Setting Command
/*************************************************************************/
The following example shows how to set the center frequency of 4051 signal/spectrum analyzers.
/*************************************************************************/
void SimpleSettings()
{
ViStatus status;
long retCnt;
// set the center frequency as 128MHz.
status = viWrite(analyzer, ":FREQENCY:CENTER 128MHz", 22, &retCnt);
}
6.3.5 Reading of Measurement Instrument Status
/*************************************************************************/
The following example shows how to read the setting status of the instrument.
/*************************************************************************/