The following C# example demonstrates how to read display data, tone-by-tone data, distortion table data, and how to add/remove display columns in the distortion table.
See the Modulation Distortion commands.
See Other SCPI Example Programs
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using System; using System.Collections.Generic; using System.IO; using System.Numerics; using Microsoft.VisualStudio.TestTools.UnitTesting; namespace mod_tests { partial class Vna { [TestMethod] public void Case02() { // Test Conditions: // - External source is named as "MXG"; // - On PNA, file "D:\Symphony\FR1_100M_64QAM.mdx" is used // - PNA Port 1 connects to DUT Input, PNA Port 2 connects to DUT Output; _fmtIO.Cmd("syst:fpr"); // add traces _fmtIO.Cmd("disp:wind1:stat on"); string[] trNames = new string[] { "POut2", "PIn1", "MSig2", "MDist2", "MGain21", "MComp21", "PGain21", "S11", "S21", "LPIn1", "LPOut1", "LPOut2" }; int idx = 1; foreach (var n in trNames) { _fmtIO.Cmd(string.Format("calc:cust:def 'ch1_{0}','Modulation Distortion','{0}'", n)); _fmtIO.Cmd(string.Format("disp:wind1:trac{0}:feed 'ch1_{1}'", idx, n)); ++idx; } // hold sweep _fmtIO.Cmd("sens:swe:mode hold"); // stimulus settings _fmtIO.Cmd("SYST:CONF:EDEV:STAT 'MXG',ON"); _fmtIO.Cmd("sens:DISTortion:MODulate:SOURce 'MXG'"); _fmtIO.Cmd(@"SOURce:MODulation:LOAD 'D:\Symphony\FR1_100M_64QAM.mdx'"); _fmtIO.Cmd("SOURce:MODulation:STATe 1"); // sweep _fmtIO.Cmd("sens:swe:mode single"); _fmtIO.CmdQry("*OPC?", TimeOuts._2min); // display scale _fmtIO.Cmd("disp:wind:trac:y:scal:coup:meth wind"); _fmtIO.Cmd("disp:wind1:trac:y:scal:coup on"); _fmtIO.Cmd("disp:wind1:y:auto"); _fmtIO.CmdQry("*OPC?", TimeOuts._1min); string desktopDir = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); // read display data { _fmtIO.Cmd("format:border swapped"); _fmtIO.Cmd("format:data real,32"); _fmtIO.Cmd("CALC:MEAS1:DATA:SDAT?"); Complex[] POut2S = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS1:DATA:FDAT?"); float[] POut2F = _fmtIO.ReadFloats(); _fmtIO.Cmd("CALC:MEAS1:MATH:MEM"); // POut2, Data to Memory _fmtIO.Cmd("CALC:MEAS1:DATA:SMEM?"); Complex[] POut2Smem = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS1:DATA:FMEM?"); float[] POut2Fmem = _fmtIO.ReadFloats(); SaveColumnsToCSV(Path.Combine(desktopDir, "mod_data_trace.csv"), new string[] { "POut2 FDAT", "POut2 SDAT", "POut2 FMEM", "POut2 SMEM" }, POut2F, POut2S, POut2Fmem, POut2Smem); } // read tone by tone data { _fmtIO.Cmd("format:border swapped"); _fmtIO.Cmd("format:data real,64"); _fmtIO.Cmd("CALC:MEAS:DATA:X:BUFFer? 'POut2'"); double[] freqTones = _fmtIO.ReadDoubles(); _fmtIO.Cmd("format:data real,32"); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'POut2'"); Complex[] POut2 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'PIn1'"); Complex[] PIn1 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'MSig2'"); Complex[] MSig2 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'MDist2'"); Complex[] MDist2 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'MGain21'"); Complex[] MGain21 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'MComp21'"); Complex[] MComp21 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'PGain21'"); Complex[] PGain21 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'S11'"); Complex[] S11 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'S21'"); Complex[] S21 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'LPIn1'"); Complex[] LPIn1 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'LPOut1'"); Complex[] LPOut1 = ToComplex(_fmtIO.ReadFloats()); _fmtIO.Cmd("CALC:MEAS:DATA:BUFFer? 'LPOut2'"); Complex[] LPOut2 = ToComplex(_fmtIO.ReadFloats()); SaveColumnsToCSV(Path.Combine(desktopDir, "mod_data_tone_by_tone.csv"), new string[] { "Freq", "POut2", "PIn1", "MSig2", "MDist2", "MGain21", "MComp21", "PGain21", "S11", "S21", "LPIn1", "LPOut1", "LPOut2" }, freqTones, ToLogMag(POut2), ToLogMag(PIn1), ToLogMag(MSig2), ToLogMag(MDist2), ToLogMag(MGain21), ToLogMag(MComp21), ToLogMag(PGain21), ToLogMag(S11), ToLogMag(S21), ToLogMag(LPIn1), ToLogMag(LPOut1), ToLogMag(LPOut2)); } // setup distortion table display _fmtIO.Cmd("disp:wind:tabl dist"); string strColVis = _fmtIO.CmdQry("sens:dist:tabl:disp:cat?"); string[] cols = strColVis.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries); _fmtIO.Cmd(string.Format("sens:dist:tabl:disp:del '{0}'", cols[0])); _fmtIO.Cmd(string.Format("sens:dist:tabl:disp:feed '{0}'", cols[0])); // get table data int bandCnt = int.Parse(_fmtIO.CmdQry("sens:DISTortion:MEASure:BAND:COUNt?")); string rowCat = _fmtIO.CmdQry("sens:dist:tabl:cat?"); { string colCat = _fmtIO.CmdQry("sens:dist:tabl:data:cat?"); string[] paramNames = new string[] { "EVM DistEq41 dBc", "EVM DistEq41 %" }; object[] col1 = new object[1 + bandCnt]; col1[0] = paramNames[0]; object[] col2 = new object[1 + bandCnt]; col2[0] = paramNames[0]; for (int bandId = 1; bandId <= bandCnt; ++bandId) { col1[bandId] = float.Parse(_fmtIO.CmdQry(string.Format("sens:dist:tabl:data:val? {0},'{1}'", bandId, paramNames[0]))); col2[bandId] = float.Parse(_fmtIO.CmdQry(string.Format("sens:dist:tabl:data:val? {0},'{1}'", bandId, paramNames[1]))); } SaveColumnsToCSV(Path.Combine(desktopDir, "mod_evm.csv"), null, col1, col2); } // all ACPEVM parameters _fmtIO.Cmd("sens:DISTortion:MEASure:BAND:INIT"); _fmtIO.Cmd("sens:swe:mode single"); _fmtIO.CmdQry("*OPC?", TimeOuts._2min); { string colCat = _fmtIO.CmdQry("sens:dist:tabl:data:cat?"); string[] paramNames = colCat.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries); float[] col1 = new float[paramNames.Length]; for (int i = 0; i < paramNames.Length; ++i) { col1[i] = float.Parse(_fmtIO.CmdQry(string.Format("sens:dist:tabl:data:val? {0},'{1}'", 1, paramNames[i]))); } SaveColumnsToCSV(Path.Combine(desktopDir, "mod_ACPEVM.csv"), null, paramNames, col1); } // all NPR parameters _fmtIO.Cmd("sens:DISTortion:MEASure:BAND:INIT"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND:TYPE NPR"); _fmtIO.Cmd("sens:swe:mode single"); _fmtIO.CmdQry("*OPC?", TimeOuts._2min); { string colCat = _fmtIO.CmdQry("sens:dist:tabl:data:cat?"); string[] paramNames = colCat.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries); float[] col1 = new float[paramNames.Length]; for (int i = 0; i < paramNames.Length; ++i) { col1[i] = float.Parse(_fmtIO.CmdQry(string.Format("sens:dist:tabl:data:val? {0},'{1}'", 1, paramNames[i]))); } SaveColumnsToCSV(Path.Combine(desktopDir, "mod_NPR.csv"), null, paramNames, col1); } } } } |