China Electronics Technology Instruments AV3672 Series, Руководство пользователя

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9 Remote control
9.3 Basic Programming Method of VISA Interface
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}
9.3.5 Reading of Frequency Marker
/*************************************************************************/
The following example shows how to read the frequency scale information.
/*************************************************************************/
voidReadMarker ()
{
ViState state;
longretCnt;
charrd_Buf_Marker[VI_READ_BUFLEN]; // #define VI_READ_BUFLEN 20
// open the frequency marker 1 and query the frequency marker peak (frequency and amplitude)
state = viWrite(analyzer, ":CALC:MARKER ON;MARKER: FUNCtion:EXECuteMAXimum\n", 25, &retCnt);
// read the X-axis information
state = viWrite(analyzer, ":CALC:MARK:X?; ", 15, &retCnt);
state = viRead(analyzer, rd_Buf_Marker, 30, &retCnt);
// read the Y-axis coordinate information
state = viWrite(analyzer, ":CALC:MARK:Y?; ", 15, &retCnt);
state = viRead(analyzer, rd_Buf_Marker, 30, &retCnt);
}
9.3.6 Reading of Trace data
/*************************************************************************/
The following example shows how to read the trace data of the vector network analyzer.
/*************************************************************************/
voidQueryData ()
{
ViState state;
longretCnt = 0;
int points= 0
// #define VI_READ_BUFLEN 1000000
charrd_Buf_BigData[VI_READ_DATABUFLEN];
charrd_Buf_Data[VI_READ_BUFLEN]; // #define VI_READ_BUFLEN 20
// selection of measurement
state = viWrite(analyzer, ":CALCulate:PARameter:SELect ' CH1_WIN1_LINE1'\n", 25, &retCnt);
// obtain the number of sweep point
state = viRead(analyzer, rd_Buf_Data, 30, &retCnt);