Copper Mountain Technologies S2 Series - Page 424

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}
status = viOpenDefaultRM(&defaultRM);
if (status < VI_SUCCESS)
{
printf("Can't initialize VISA\n");
return –1;
}
status = viOpen(defaultRM, argv[1], VI_NULL, VI_NULL, &instr);
if (status < VI_SUCCESS)
{
printf("Can't open VISA address: %s\n", argv[1]);
return –1;
}
//
// Set the answer timeout
//
viSetAttribute(instr, VI_ATTR_TMO_VALUE, 5000);
//
// Enable the terminal character
//
viSetAttribute(instr, VI_ATTR_TERMCHAR_EN, VI_TRUE);
viSetAttribute(instr, VI_ATTR_TERMCHAR, '\n');
//
// Read ID string from Analyzer
//
viPrintf(instr, "*IDN?\n");
viRead(instr, buffer, sizeof(buffer), &retCount);
printf("*IDN? Returned %d bytes: %.*s\n\n", retCount, retCount, buffer);
//
// Set up the Analyzer
//
viPrintf(instr, "SYST:PRES\n");
viPrintf(instr, "SENS:SWE:POIN %d\n", NOP);
viPrintf(instr, "CALC:PAR1:DEF S21\n");
viPrintf(instr, "CALC:PAR1:SEL\n");
viPrintf(instr, "CALC:FORM MLOG\n");
viPrintf(instr, "SENS:BAND 10\n");
//
// Trigger measurement and wait for completion
//
viPrintf(instr, ":TRIG:SOUR BUS\n");
viPrintf(instr, ":TRIG:SING\n");
viQueryf(instr, "*OPC?\n", "%d", &temp);
//
// Read out measurement data
//
retCount = maxCnt * 2;
viQueryf(instr, "CALC:DATA:FDAT?\n", "%,#lf", &retCount, Data);
retCount = maxCnt;
viQueryf(instr, "SENS:FREQ:DATA?\n", "%,#lf", &retCount, Freq);
//
// Display measurement data
//