Ceyear 4051 Series, User Manual

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6 Remote control
6.3 Basic Programming Method of VISA Interface
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/* Command INITiate[:IMMediate] start single sweep ( closed in Cont SweepINIT:CONT OFF)*/
/* Execute next command of command buffer zone after single scanning */
/*********************************************************************/
status = viWrite(analyzer, ":INIT:CONT OFF", 13, &retCnt);
// Method 1 of waiting for ending of scanning: use *WAI
status = viWrite(analyzer, ":INIT", 18, &retCnt);
status = viWrite(analyzer, "*WAI", 18, &retCnt);
// Method 2 of waiting for ending of scanning: use *OPC?
status = viWrite(analyzer, ":INIT", 20, &retCnt);
status = viWrite(analyzer, "*OPC?", 18, &retCnt);
status = viRead(analyzer, OpcOk, 2, &retCnt); //Wait for*OPC and return to ―1‖
// Method 3 of waiting for ending of scanning: use *OPC
//To use GPIB service request, set "Disable Auto Serial Poll"
为
"yes" status = viWrite(analyzer, "*SRE 32", 7,
&retCnt);
status = viWrite(analyzer, "*ESE 1", 6, &retCnt); // enable service request ESR
// set event enabling bit to complete operation
status = viEnableEvent(analyzer, VI_EVENT_SERVICE_REQ, VI_QUEUE, VI_NULL);
// enable SRQ event
status = viWrite(analyzer, ":INIT ", 18, &retCnt);
status = viWrite(analyzer, "*OPC?", 18, &retCnt);
// start scanning synchronously with OPC
status = viWaitOnEvent(analyzer, VI_EVENT_SERVICE_REQ, 10000, &etype,
&eevent)
// wait for service request
status = viReadSTB(analyzer, &stat);
status = viClose(eevent); // close event handle
// prohibit SRQ event
status = viDisableEvent(analyzer, VI_EVENT_SERVICE_REQ, VI_QUEUE);
// main program continues……
}