Tektronix WCA230A, Programmer'S Manual

Page: 629 / 678

Programming Examples
WCA230A & WCA280A Programmer Manual
4- 5
// Channel power measurement
void
measCHPOWER(void)
{
GpibWrite("*CLS"); // Clear the status register
GpibWrite("*ESE 1"); // Set the OPC bit of ESER
GpibWrite("*SRE 32"); // Set the ESB bit of SRER
// Set up the analyzer
GpibTimeOut(LONG_TIME);
GpibWrite("INSTrument 'SANORMAL'");
GpibWrite("*RST");
// Reset the analyzer
GpibTimeOut(NORMAL_TIME);
GpibWrite("CONFigure:SPECtrum:CHPower");
GpibWrite("FREQuency:CENTer 1GHz");
GpibWrite("FREQuency:SPAN 1MHz");
GpibTimeOut(LONG_TIME);
GpibWrite("*CAL?");
GpibRead(readBuf, MAX_BUF);
printf("*CAL? result = %s\n", readBuf);
GpibTimeOut(NORMAL_TIME);
GpibWrite("CHPower:BANDwidth:INTegration 300kHz");
GpibWrite("SPECtrum:AVERage ON");
GpibWrite("SPECtrum:AVERage:COUNt 100");
// Perform the measurement
GpibTimeOut(LONG_TIME);
GpibWrite("INITiate:CONTinuous OFF;*OPC");
WaitOPC();
// Wait for the OPC bit set
GpibWrite("INITiate;*OPC");
WaitOPC();
GpibTimeOut(NORMAL_TIME);
// Get measurement results and save them to the file chpower
GpibWrite("FETCh:SPECtrum:CHPower?");
GpibReadFile("chpower");
}