The following C# example demonstrates how to set up a modulation distortion measurement.
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 Case01() { // 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[] { "PIn1", "POut2", "MDist2" }; 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"); string str; // Setup Sweep _fmtIO.Cmd("sens:DISTortion:SWEep:CARRier:FREQuency 1e9"); _fmtIO.Cmd("sens:freq:cent 1e9"); _fmtIO.Cmd("sens:freq:span 400e6"); _fmtIO.Cmd("sens:DISTortion:SWEep:POWer:CARRier:LEVel:PORT DOUT2"); _fmtIO.Cmd("sens:DISTortion:SWEep:POWer:CARRier:LEVel -15"); _fmtIO.Cmd("sens:DISTortion:SWEep:POWer:SPARam:LEVel -25"); str = _fmtIO.CmdQry("sens:freq:cent?"); str = _fmtIO.CmdQry("sens:freq:span?"); str = _fmtIO.CmdQry("sens:DISTortion:SWEep:CARRier:FREQuency?"); str = _fmtIO.CmdQry("sens:DISTortion:SWEep:POWer:CARRier:LEVel:PORT?"); str = _fmtIO.CmdQry("sens:DISTortion:SWEep:POWer:CARRier:LEVel?"); str = _fmtIO.CmdQry("sens:DISTortion:SWEep:POWer:SPARam:LEVel?"); // RF Path _fmtIO.Cmd("sens:dist:path:dut:inp 1"); _fmtIO.Cmd("sens:dist:path:dut:outp 4"); str = _fmtIO.CmdQry("sens:dist:path:dut:inp?"); str = _fmtIO.CmdQry("sens:dist:path:dut:outp?"); str = _fmtIO.CmdQry("sens:dist:path:dut:nom:gain?"); str = _fmtIO.CmdQry("sens:dist:path:dut:nom:nf?"); _fmtIO.Cmd("sens:dist:path:sour:nom:ampl 10"); _fmtIO.Cmd("sens:dist:path:dut:nom:gain 10"); _fmtIO.Cmd("sens:dist:path:dut:nom:nf 3"); str = _fmtIO.CmdQry("sens:dist:path:sour:nom:ampl?"); str = _fmtIO.CmdQry("sens:dist:path:dut:nom:gain?"); str = _fmtIO.CmdQry("sens:dist:path:dut:nom:nf?"); _fmtIO.Cmd("sens:dist:path:sour:nom:ampl 0"); _fmtIO.Cmd("sens:dist:path:dut:nom:gain 0"); _fmtIO.Cmd("sens:dist:path:dut:nom:nf 0"); // Modulate _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"); str = _fmtIO.CmdQry("sens:DISTortion:MODulate:SOURce?"); str = _fmtIO.CmdQry("SOURce:MODulation:FILE?"); str = _fmtIO.CmdQry("SOURce:MODulation:STATe?"); // Measure str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND1:NAME?"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND1:TYPE?"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND1:NAME 'TEST1'"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND1:TYPE NPR"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND1:NOTCh:OFFS?"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND1:NOTCh:IBW?"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND1:NOTCh:OFFS 20e6"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND1:NOTCh:IBW 10e6"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND:ADD"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND2:NAME 'TEST2'"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND2:TYPE ACP"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND2:ACP:LOW:OFFS?"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND2:ACP:LOW:IBW?"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND2:ACP:UPP:OFFS?"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND2:ACP:UPP:IBW?"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND2:ACP:LOW:OFFS -90e6"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND2:ACP:LOW:IBW 90e6"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND2:ACP:UPP:OFFS 90e6"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND2:ACP:UPP:IBW 90e6"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND1:DEL"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND:INIT"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND:CARR:OFFS?"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND:CARR:IBW?"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND:CARR:OFFS 0"); _fmtIO.Cmd("sens:DISTortion:MEASure:BAND:CARR:IBW 90e6"); str = _fmtIO.CmdQry("sens:DISTortion:MEASure:BAND:COUNt?"); // do a full sweep (noise, s21 and measurement) _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"); // change Test Receiver Attenuation _fmtIO.Cmd("sour:pow4:att:rec:test 10"); _fmtIO.Cmd("sens:swe:mode single"); _fmtIO.CmdQry("*OPC?", TimeOuts._2min); // change DUT Analysis BW str = _fmtIO.CmdQry("sens:dist:meas:corr:aper:auto?"); str = _fmtIO.CmdQry("sens:dist:meas:corr:aper?"); _fmtIO.Cmd("sens:dist:meas:corr:aper 20e6"); str = _fmtIO.CmdQry("sens:dist:meas:corr:aper:auto?"); str = _fmtIO.CmdQry("sens:dist:meas:corr:aper?"); _fmtIO.Cmd("sens:swe:mode single"); _fmtIO.CmdQry("*OPC?", TimeOuts._2min); _fmtIO.Cmd("sens:dist:meas:corr:aper:auto 1");
// change ADC Filter Type str = _fmtIO.CmdQry("sens:dist:adc:filt:type?"); _fmtIO.Cmd("sens:dist:adc:filt:type NARR"); _fmtIO.Cmd("sens:swe:mode single"); _fmtIO.CmdQry("*OPC?", TimeOuts._2min); _fmtIO.Cmd("sens:dist:adc:filt:type AUTO"); // re-use linear sweeps, change power and do measurement sweep str = _fmtIO.CmdQry("sens:dist:swe:lin:reus?"); _fmtIO.Cmd("sens:dist:swe:lin:reus 1"); int pwr = -30; // power start while (pwr <= -10) // power stop { _fmtIO.Cmd(string.Format("sens:DISTortion:SWEep:POWer:CARRier:LEVel {0}", pwr)); _fmtIO.Cmd("sens:swe:mode single"); _fmtIO.CmdQry("*OPC?", TimeOuts._2min); pwr += 5; // power step } _fmtIO.Cmd("sens:dist:swe:lin:reus 1"); } } } |