public static void DownloadWaveform(NIRfsg rfsgHandle, Waveform waveform)
{
IntPtr rfsgPtr = rfsgHandle.GetInstrumentHandle().DangerousGetHandle();
rfsgHandle.Abort();
rfsgHandle.RF.PowerLevelType = RfsgRFPowerLevelType.PeakPower;
try
{
rfsgHandle.Arb.ClearWaveform(waveform.WaveformName); //Clear existing waveform to avoid erros
}
catch (Ivi.Driver.OutOfRangeException)
{ //Intentionally ignore this exception; clearing the waveform failed because it doesn't exist
}
rfsgHandle.Arb.WriteWaveform(waveform.WaveformName, waveform.WaveformData);
//Store loaded parameters
NIRfsgPlayback.StoreWaveformSignalBandwidth(rfsgPtr, waveform.WaveformName, waveform.SignalBandwidth_Hz);
NIRfsgPlayback.StoreWaveformPapr(rfsgPtr, waveform.WaveformName, waveform.PAPR_dB);
NIRfsgPlayback.StoreWaveformBurstStartLocations(rfsgPtr, waveform.WaveformName, waveform.BurstStartLocations);
NIRfsgPlayback.StoreWaveformBurstStopLocations(rfsgPtr, waveform.WaveformName, waveform.BurstStopLocations);
NIRfsgPlayback.StoreWaveformSampleRate(rfsgPtr, waveform.WaveformName, waveform.SampleRate);
//Manually configure additional settings
NIRfsgPlayback.StoreWaveformLOOffsetMode(rfsgPtr, waveform.WaveformName, NIRfsgPlaybackLOOffsetMode.Disabled);
NIRfsgPlayback.StoreWaveformRuntimeScaling(rfsgPtr, waveform.WaveformName, -1.5);
NIRfsgPlayback.StoreWaveformRFBlankingEnabled(rfsgPtr, waveform.WaveformName, false);
}
private static void NormalizeWaveform(ref Waveform waveform)
{
//Normalize the waveform data
double[] magnitudeArray = waveform.WaveformData.GetMagnitudeDataArray(false);
ComplexSingle waveformMax = new ComplexSingle((float)magnitudeArray.Max(), 0);
WritableBuffer <ComplexSingle> waveformBuffer = waveform.WaveformData.GetWritableBuffer();
for (int i = 0; i < waveformBuffer.Count(); i++)
{
waveformBuffer[i] = waveformBuffer[i] / waveformMax; //Scale each point by the max value
}
//Calculate PAPR over only the burst length
int offset = waveform.BurstStartLocations[0];
int count = waveform.BurstStopLocations[0] - offset;
double[] waveformBurst = new double[count];
//Retrieve the subset of the magnitude waveform covering the waveform burst
Array.Copy(waveform.WaveformData.GetMagnitudeDataArray(false), offset, waveformBurst, 0, count);
for (int i = 0; i < count; i++)
{
waveformBurst[i] = Math.Pow(waveformBurst[i], 2);
}
double rms = Math.Sqrt(waveformBurst.Sum() / count); //RMS = sqrt(1/n*(|x_0|^2+|x_1|^2...|x_n|^2))
//PAPR (Peak to Average Power Ratio) = Peak Power/Avg Power
//PAPR (dB) = 20*log(max/avg)
//Since we already scaled the data, the max value is simply 1
waveform.PAPR_dB = 20 * Math.Log10(1 / rms);
}
/// <summary>Calls <see cref="NIRfsgPlayback.SetScriptToGenerateSingleRfsg(IntPtr, string)"/>, which will download the script contained in <paramref name="waveform"/> and apply
/// all associated parameters.</summary>
/// <param name="rfsgHandle">The open RFSG session to configure.</param>
/// <param name="waveform">Specifies the waveform and its associated script that is to be used for generation.</param>
public static void ApplyWaveformAttributes(NIRfsg rfsgHandle, Waveform waveform)
{
if (string.IsNullOrEmpty(waveform.Script)) // default to continuous if no script in waveform
{
ConfigureContinuousGeneration(rfsgHandle, waveform);
}
else
{
IntPtr rfsgPtr = rfsgHandle.GetInstrumentHandle().DangerousGetHandle();
NIRfsgPlayback.SetScriptToGenerateSingleRfsg(rfsgPtr, waveform.Script);
}
}
public static Waveform LoadWaveformFromTDMS(string filePath, string waveformName = "", bool normalizeWaveform = true)
{
Waveform waveform = new Waveform();
if (string.IsNullOrEmpty(waveformName))
{
waveformName = Path.GetFileNameWithoutExtension(filePath);
Utilities.FormatWaveformName(ref waveformName);
}
waveform.WaveformName = waveformName;
NIRfsgPlayback.ReadWaveformFromFileComplex(filePath, ref waveform.WaveformData);
NIRfsgPlayback.ReadSignalBandwidthFromFile(filePath, 0, out waveform.SignalBandwidth_Hz);
NIRfsgPlayback.ReadWaveformFileVersionFromFile(filePath, out string waveformVersion);
if (waveformVersion == "1.0.0")
{
NIRfsgPlayback.ReadPeakPowerAdjustmentFromFile(filePath, 0, out waveform.PAPR_dB);
}
else
{
NIRfsgPlayback.ReadPaprFromFile(filePath, 0, out waveform.PAPR_dB); //Version 2.0.0 and later
}
NIRfsgPlayback.ReadBurstStartLocationsFromFile(filePath, 0, ref waveform.BurstStartLocations);
NIRfsgPlayback.ReadBurstStopLocationsFromFile(filePath, 0, ref waveform.BurstStopLocations);
//Statement reads: if NOT BurstStartLocations > 0 AND expression is not null (? operand)
//In other words, manually set BurstStartLocations when the length is 0 or less or array is null
if (!(waveform.BurstStartLocations?.Length > 0))
{
//Set burst start to the first sample(0)
waveform.BurstStartLocations = new int[1] {
0
};
}
if (!(waveform.BurstStopLocations?.Length > 0))
{
//Set burst stop to the last sample (number of samples minus one)
waveform.BurstStopLocations = new int[1] {
waveform.WaveformData.SampleCount - 1
};
}
NIRfsgPlayback.ReadSampleRateFromFile(filePath, 0, out waveform.SampleRate);
waveform.BurstLength_s = CalculateWaveformDuration(waveform.BurstStartLocations, waveform.BurstStopLocations, waveform.SampleRate);
if (normalizeWaveform)
{
NormalizeWaveform(waveform);
}
return(waveform);
}
public static Waveform GetWaveformParametersByName(NIRfsg rfsgHandle, string waveformName)
{
IntPtr rfsgPtr = rfsgHandle.GetInstrumentHandle().DangerousGetHandle();
Waveform waveform = new Waveform
{
WaveformName = waveformName
};
NIRfsgPlayback.RetrieveWaveformSignalBandwidth(rfsgPtr, waveformName, out waveform.SignalBandwidth_Hz);
NIRfsgPlayback.RetrieveWaveformPapr(rfsgPtr, waveformName, out waveform.PAPR_dB);
NIRfsgPlayback.RetrieveWaveformSampleRate(rfsgPtr, waveformName, out waveform.SampleRate);
NIRfsgPlayback.RetrieveWaveformBurstStartLocations(rfsgPtr, waveformName, ref waveform.BurstStartLocations);
NIRfsgPlayback.RetrieveWaveformBurstStopLocations(rfsgPtr, waveformName, ref waveform.BurstStopLocations);
waveform.BurstLength_s = CalculateWaveformDuration(waveform.BurstStartLocations, waveform.BurstStopLocations, waveform.SampleRate);
return(waveform);
}
/// <summary>Configures the generator to generate the waveform plus idle time continuously for Dynamic EVM test cases. Also configures triggering or pulsing settings to
/// control the DUT. Use <see cref="AbortGeneration(NIRfsg, int)"/> to abort generation to always ensure that the DUT state is returned to the initial state.</summary>
/// <param name="rfsgHandle">The open RFSG session to configure.</param>
/// <param name="waveform">Specifies the waveform to generate; its burst length will be used in conjuction with the duty cycle to calculate the idle time.
/// Call <see cref="DownloadWaveform(NIRfsg, Waveform)"/> prior to calling this function.</param>
/// <param name="waveTiming">Specifies the timing parameters used to configure the bursted generation.</param>
/// <param name="paenConfig">Specifies parameters pertaining to how the DUT is controlled during generation.</param>
/// <param name="period">Returns the total generation period, consisting of the waveform burst length, idle time, and any additional pre/post burst time configured.</param>
/// <param name="idleTime">Returns the computed idle time based upon the requested duty cycle.</param>
/// <returns>The Waveform with the "Script" parameter set to the newly created generation script.</returns>
public static Waveform ConfigureBurstedGeneration(NIRfsg rfsgHandle, Waveform waveform, WaveformTimingConfiguration waveTiming,
PAENConfiguration paenConfig, out double period, out double idleTime)
{
// Validate input parameters
if (waveTiming.DutyCycle_Percent <= 0 || waveTiming.DutyCycle_Percent >= 100)
{
throw new ArgumentOutOfRangeException("DutyCycle_Percent", waveTiming.DutyCycle_Percent, "Duty cycle must be greater than 0% and less than 100%. " +
"For a duty cycle of 100%, use SG.ConfigureContinuous generation instead.");
}
if (waveTiming.PreBurstTime_s <= 0 || waveTiming.PostBurstTime_s <= 0)
{
throw new ArgumentOutOfRangeException("PreBurstTime | PostBurstTime", "PreBurstTime and PostBurstTime must be greater than 0 seconds");
}
//Download the generation script to the generator for later initiation
waveform.Script = GenerateBurstedScript(paenConfig, waveTiming, waveform, out period, out idleTime);
ApplyWaveformAttributes(rfsgHandle, waveform);
//Configure the triggering for PA enable if selected
if (paenConfig.PAEnableMode != PAENMode.Disabled)
{
rfsgHandle.DeviceEvents.MarkerEvents[1].ExportedOutputTerminal = RfsgMarkerEventExportedOutputTerminal.FromString(
paenConfig.PAEnableTriggerExportTerminal);
rfsgHandle.DeviceEvents.MarkerEvents[1].OutputBehaviour = paenConfig.PAEnableTriggerMode;
// Ensure that the initial state for the digital line is low when using toggle mode to ensure the DUT state is correct
rfsgHandle.DeviceEvents.MarkerEvents[1].ToggleInitialState = RfsgMarkerEventToggleInitialState.DigitalLow;
}
//Configure scriptTrigger0 for software triggering. This way, when it is time to abort we can stop
//the loop and trigger the appropriate off command if PAEN mode is Static
rfsgHandle.Triggers.ScriptTriggers[0].ConfigureSoftwareTrigger();
//Configure the trigger to be generated on the first sample of each waveform generation,
//denoted in the script below as "marker0"
rfsgHandle.DeviceEvents.MarkerEvents[0].ExportedOutputTerminal =
RfsgMarkerEventExportedOutputTerminal.FromString(waveTiming.BurstStartTriggerExport);
// Return updated waveform struct to caller
return(waveform);
}
private static void NormalizeWaveform(Waveform waveform)
{
// Normalize the waveform data
float[] magnitudeArray = ComplexSingle.GetMagnitudes(waveform.WaveformData.GetRawData());
float magnitudeMax = magnitudeArray.Max();
WritableBuffer <ComplexSingle> waveformBuffer = waveform.WaveformData.GetWritableBuffer();
for (int i = 0; i < waveformBuffer.Count(); i++)
{
waveformBuffer[i] = ComplexSingle.FromPolar(waveformBuffer[i].Magnitude / magnitudeMax, waveformBuffer[i].Phase);
}
// Calculate PAPR over only the burst length
double burstPowerSum = 0;
int burstSampleCount = 0;
for (int i = 0; i < waveform.BurstStartLocations.Length; i++)
{
int offset = waveform.BurstStartLocations[i];
int count = waveform.BurstStopLocations[i] - offset;
burstSampleCount += count;
foreach (ComplexSingle iqPoint in waveformBuffer.Skip(offset).Take(count))
{
burstPowerSum += iqPoint.Real * iqPoint.Real + iqPoint.Imaginary * iqPoint.Imaginary;
}
}
// RMS = sqrt(1/n*(|x_0|^2+|x_1|^2...|x_n|^2))
// |x_n| = sqrt(i_n^2 + q_n^2) therefore |x_n|^2 = i_n^2 + q_n^2
// RMS Power = v_rms^2 = 1/n*(|x_0|^2+|x_1|^2...|x_n|^2) hence p_rms = p_avg
// averagePower = burstPowerSum / burstSampleCount;
// PAPR (Peak to Average Power Ratio) = Peak Power/Avg Power
// PAPR (dB) = 10*log(Peak Power/Avg Power)
// Since we already scaled the data, the max value is simply 1
// instead of doing waveform.PAPR_dB = 10 * Math.Log10(1 / averagePower) we will save a divide and invert the averagePower calculation
waveform.PAPR_dB = 10 * Math.Log10(burstSampleCount / burstPowerSum);
}
public static void ConfigureContinuousGeneration(NIRfsg rfsgHandle, Waveform waveform, string waveformStartTriggerExport = "PXI_Trig0")
{
//Configure the trigger to be generated on the first sample of each waveform generation,
//denoted in the script below as "marker0"
rfsgHandle.DeviceEvents.MarkerEvents[0].ExportedOutputTerminal = RfsgMarkerEventExportedOutputTerminal.FromString(waveformStartTriggerExport);
//A software trigger is configured that is used in the script below to control generation of
//the script. This ensures that a complete packet is always generated before aborting, and
//allows all generation functions to share a single abort function.
rfsgHandle.Triggers.ScriptTriggers[0].ConfigureSoftwareTrigger();
string script = $@"script REPEAT{waveform.WaveformName}
repeat until ScriptTrigger0
generate {waveform.WaveformName} marker0(0)
end repeat
end script";
//Get the instrument handle to utilize with the RFSGPlayback library
IntPtr rfsgPtr = rfsgHandle.GetInstrumentHandle().DangerousGetHandle();
//Download the newly created script for generation when "Initiate" is called
NIRfsgPlayback.SetScriptToGenerateSingleRfsg(rfsgPtr, script);
}
/// <summary>Downloads a previously loaded waveform to the instrument and sets associated properties.</summary>
/// <param name="rfsgHandle">The open RFSG session to configure.</param>
/// <param name="waveform">The waveform data and associated properties to download to the instrument. Use <see cref="LoadWaveformFromTDMS(string, string)"/> to load a waveform from a TDMS file.</param>
public static void DownloadWaveform(NIRfsg rfsgHandle, Waveform waveform)
{
IntPtr rfsgPtr = rfsgHandle.GetInstrumentHandle().DangerousGetHandle();
rfsgHandle.Abort();
try
{
rfsgHandle.Arb.ClearWaveform(waveform.Name); //Clear existing waveform to avoid erros
}
catch (Exception ex)
{
if (ex is Ivi.Driver.OutOfRangeException || ex is Ivi.Driver.IviCDriverException)
{
} //Intentionally ignore this exception; clearing the waveform failed because it doesn't exist
else
{
throw;
}
}
rfsgHandle.RF.PowerLevelType = RfsgRFPowerLevelType.PeakPower; // set power level to peak before writing so RFSG doesn't scale waveform
rfsgHandle.Arb.WriteWaveform(waveform.Name, waveform.Data);
//Store loaded parameters
NIRfsgPlayback.StoreWaveformSignalBandwidth(rfsgPtr, waveform.Name, waveform.SignalBandwidth_Hz);
NIRfsgPlayback.StoreWaveformPapr(rfsgPtr, waveform.Name, waveform.PAPR_dB);
NIRfsgPlayback.StoreWaveformBurstStartLocations(rfsgPtr, waveform.Name, waveform.BurstStartLocations);
NIRfsgPlayback.StoreWaveformBurstStopLocations(rfsgPtr, waveform.Name, waveform.BurstStopLocations);
NIRfsgPlayback.StoreWaveformSampleRate(rfsgPtr, waveform.Name, waveform.SampleRate);
NIRfsgPlayback.StoreWaveformRuntimeScaling(rfsgPtr, waveform.Name, waveform.RuntimeScaling);
NIRfsgPlayback.StoreWaveformSize(rfsgPtr, waveform.Name, waveform.Data.SampleCount);
//Manually configure additional settings
NIRfsgPlayback.StoreWaveformLOOffsetMode(rfsgPtr, waveform.Name, NIRfsgPlaybackLOOffsetMode.Auto);
NIRfsgPlayback.StoreWaveformRFBlankingEnabled(rfsgPtr, waveform.Name, false);
}
/// <summary>Configures the generator to generate the waveform continuously with a trigger on the first sample of the waveform. Use <see cref="AbortGeneration(NIRfsg, int)"/>
/// to abort generation to always ensure complete packet generation.</summary>
/// <param name="rfsgHandle">The open RFSG session to configure.</param>
/// <param name="waveform">Specifies the waveform to generate continuously. Call <see cref="DownloadWaveform(NIRfsg, Waveform)"/> prior to calling this function.</param>
/// <param name="markerEventExportTerminal">(Optional) Specifies the terminal name where the trigger at the start of the waveform should be exported to.
/// The default value is to generate a trigger on the PXI_Trig0 line.</param>
/// <returns>The Waveform with the "Script" parameter set to the newly created generation script.</returns>
public static Waveform ConfigureContinuousGeneration(NIRfsg rfsgHandle, Waveform waveform, string markerEventExportTerminal = "PXI_Trig0")
{
//Configure the trigger to be generated on the first sample of each waveform generation,
//denoted in the script below as "marker0"
rfsgHandle.DeviceEvents.MarkerEvents[0].ExportedOutputTerminal = RfsgMarkerEventExportedOutputTerminal.FromString(markerEventExportTerminal);
//A software trigger is configured that is used in the script below to control generation of
//the script. This ensures that a complete packet is always generated before aborting, and
//allows all generation functions to share a single abort function.
rfsgHandle.Triggers.ScriptTriggers[0].ConfigureSoftwareTrigger();
// Create continuous generation script that is unique to the waveform
waveform.Script = $@"script REPEAT{waveform.Name}
repeat until ScriptTrigger0
generate {waveform.Name} marker0(0)
end repeat
end script";
// Configure the instrument to generate this waveform
ApplyWaveformAttributes(rfsgHandle, waveform);
// Return updated waveform struct to caller
return(waveform);
}
/// <summary>Creates the generation script used for bursted generation.</summary>
/// <param name="waveTiming">Specifies the timing parameters used to configure the bursted generation.</param>
/// <param name="paenConfig">Specifies parameters pertaining to how the DUT is controlled during generation.</param>
/// <param name="waveform">Specifies the waveform to generate; its burst length will be used in conjuction with the duty cycle to calculate the idle time.</param>
/// <param name="generationPeriod_s">Returns the total generation period, consisting of the waveform burst length, idle time, and any additional pre/post burst time configured.</param>
/// <param name="idleTime_s">Returns the computed idle time based upon the requested duty cycle.</param>
/// <returns>The script to implement the requested bursted generation timing.</returns>
private static string GenerateBurstedScript(PAENConfiguration paenConfig, WaveformTimingConfiguration waveTiming, Waveform waveform,
out double generationPeriod_s, out double idleTime_s)
{
string scriptName = string.Format("{0}{1}", waveform.Name, waveTiming.DutyCycle_Percent);
//Calculate various timining information
double dutyCycle = waveTiming.DutyCycle_Percent / 100;
double totalBurstTime = waveTiming.PreBurstTime_s + waveform.BurstLength_s + waveTiming.PostBurstTime_s;
idleTime_s = (totalBurstTime / dutyCycle) - totalBurstTime;
generationPeriod_s = totalBurstTime + idleTime_s;
//Convert all time based values to sample based values
long preBurstSamp, postBurstSamp, idleSamp, enableSamples, disableSamples;
preBurstSamp = TimeToSamples(waveTiming.PreBurstTime_s, waveform.SampleRate);
postBurstSamp = TimeToSamples(waveTiming.PostBurstTime_s, waveform.SampleRate);
idleSamp = TimeToSamples(idleTime_s, waveform.SampleRate);
enableSamples = TimeToSamples(paenConfig.CommandEnableTime_s, waveform.SampleRate);
disableSamples = TimeToSamples(paenConfig.CommandDisableTime_s, waveform.SampleRate);
//RFSG enforces a minimum wait time of 8 samples, so ensure that the minimum pre/post burst time
// and idle time are at least 8 samples long
if (preBurstSamp < 8)
{
preBurstSamp = 8;
}
if (postBurstSamp < 8)
{
postBurstSamp = 8;
}
if (idleSamp < 8)
{
idleSamp = 8;
}
//Initialize the script StringBuilder with the first line of the script (name)
StringBuilder sb = new StringBuilder($"script {scriptName}");
sb.AppendLine();
#region Script Building
//If we have a static PA Enable mode, ensure that we trigger at the beginning of the script prior to looping.
if (paenConfig.PAEnableMode == PAENMode.Static)
{
sb.AppendLine("wait 8 marker1(7)");
}
//Configure for endless repeating
sb.AppendLine("Repeat until scriptTrigger0");
//Configure the idle time prior to each packet generation
sb.Append($"wait {idleSamp}");
//If PAEN Mode is dynamic we need to trigger the PA to enable
if (paenConfig.PAEnableMode == PAENMode.Dynamic)
{
//PA Enable is triggered at or before the last sample of the wait period
long PAEnableTriggerLoc = idleSamp - enableSamples - 1;
sb.Append($" marker1({PAEnableTriggerLoc})");
}
sb.AppendLine();
//Configure waiting for the pre-burst time
sb.AppendLine($"wait {preBurstSamp}");
//Configure generation of the selected waveform but only for the burst length; send a trigger at the beginning of each burst
sb.Append($"generate {waveform.Name} subset({waveform.BurstStartLocations[0]},{waveform.BurstStopLocations[0]}) marker0(0)");
//Check to see if the command time is longer than the post-burst time, which determines when the PA disable command needs sent
bool LongCommand = waveTiming.PostBurstTime_s <= paenConfig.CommandDisableTime_s;
if (paenConfig.PAEnableMode == PAENMode.Dynamic && LongCommand)
{
//Trigger is placed a number of samples from the end of the burst corresponding with
//how much longer than the post burst time it is
long PADisableTriggerLoc = waveform.BurstStopLocations[0] - (disableSamples - postBurstSamp) - 1;
sb.Append($" marker1({PADisableTriggerLoc})");
}
sb.AppendLine();
//Configure waiting for the post-burst time
sb.Append($"wait {postBurstSamp}");
//If the ommand time is shorter than the post-burst time, the disable trigger must be sent
//during the post-burst time
if (paenConfig.PAEnableMode == PAENMode.Dynamic && !LongCommand)
{
long PADisableTriggerLoc = postBurstSamp - disableSamples - 1;
sb.Append($" marker1({PADisableTriggerLoc})");
}
sb.AppendLine();
//Close out the script
sb.AppendLine("end repeat");
//If we have a static PA Enable mode, ensure that we trigger at the end of the script prior to concluding.
if (paenConfig.PAEnableMode == PAENMode.Static)
{
sb.AppendLine("wait 10 marker1(0)");
}
sb.AppendLine("end script");
#endregion
return(sb.ToString());
}
/// <summary>Loads a waveform and relevant properties from a TDMS file.</summary>
/// <param name="filePath">Specifies the absolute path to the .TDMS waveform file on disk.</param>
/// <param name="waveformName">(Optional) Specifies the name to use to represent the waveform. The file name will be used by default.</param>
/// <returns>The waveform data and associated properties represented in the Waveform type.</returns>
public static Waveform LoadWaveformFromTDMS(string filePath, string waveformName = "")
{
Waveform waveform = new Waveform();
if (string.IsNullOrEmpty(waveformName))
{
waveformName = Path.GetFileNameWithoutExtension(filePath);
waveformName = FormatWaveformName(waveformName);
}
waveform.Name = waveformName;
NIRfsgPlayback.ReadWaveformFromFileComplex(filePath, ref waveform.Data);
NIRfsgPlayback.ReadWaveformFileVersionFromFile(filePath, out string waveformVersion);
if (waveformVersion == "1.0.0")
{
// 1.0.0 waveforms use peak power adjustment = papr + runtime scaling
// we will scale the waveform and calculate papr and runtime scaling manually
float peak = ComplexSingle.GetMagnitudes(waveform.Data.GetRawData()).Max();
waveform.RuntimeScaling = 20.0 * Math.Log10(peak);
NIRfsgPlayback.ReadPeakPowerAdjustmentFromFile(filePath, 0, out double peakPowerAdjustment);
waveform.PAPR_dB = peakPowerAdjustment + waveform.RuntimeScaling;
// scale the waveform to full scale
WritableBuffer <ComplexSingle> waveformBuffer = waveform.Data.GetWritableBuffer();
ComplexSingle scale = ComplexSingle.FromPolar(1.0f / peak, 0.0f);
for (int i = 0; i < waveform.Data.SampleCount; i++)
{
waveformBuffer[i] = waveformBuffer[i] * scale; // multiplication is faster than division
}
}
else
{
NIRfsgPlayback.ReadPaprFromFile(filePath, 0, out waveform.PAPR_dB); //Version 2.0.0 and later
NIRfsgPlayback.ReadRuntimeScalingFromFile(filePath, 0, out waveform.RuntimeScaling);
}
NIRfsgPlayback.ReadSampleRateFromFile(filePath, 0, out waveform.SampleRate);
NIRfsgPlayback.ReadSignalBandwidthFromFile(filePath, 0, out waveform.SignalBandwidth_Hz);
if (waveform.SignalBandwidth_Hz == 0.0)
{
waveform.SignalBandwidth_Hz = 0.8 * waveform.SampleRate;
}
NIRfsgPlayback.ReadBurstStartLocationsFromFile(filePath, 0, ref waveform.BurstStartLocations);
NIRfsgPlayback.ReadBurstStopLocationsFromFile(filePath, 0, ref waveform.BurstStopLocations);
//Statement reads: if NOT BurstStartLocations > 0 AND expression is not null (? operand)
//In other words, manually set BurstStartLocations when the length is 0 or less or array is null
if (!(waveform.BurstStartLocations?.Length > 0))
{
waveform.BurstStartLocations = new int[1] {
0
}
}
; //Set burst start to the first sample(0)
if (!(waveform.BurstStopLocations?.Length > 0))
{
waveform.BurstStopLocations = new int[1] {
waveform.Data.SampleCount - 1
}
}
; //Set burst stop to the last sample (number of samples minus one)
// calculating IdleDurationPresent like this also accounts for tools like wlan sfp that put in burst start and stop locations even if there is no idle time in the waveform
waveform.IdleDurationPresent = waveform.BurstStopLocations.First() - waveform.BurstStartLocations.First() < waveform.Data.SampleCount - 1;
waveform.BurstLength_s = CalculateWaveformDuration(waveform.BurstStartLocations, waveform.BurstStopLocations, waveform.SampleRate);
return(waveform);
}
public static void ConfigureBurstedGeneration(NIRfsg rfsgHandle, Waveform waveform, WaveformTimingConfiguration waveTiming,
PAENConfiguration paenConfig, out double period, out double idleTime)
{
IntPtr rfsgPtr = rfsgHandle.GetInstrumentHandle().DangerousGetHandle();
rfsgHandle.Arb.GenerationMode = RfsgWaveformGenerationMode.Script;
string scriptName = String.Format("{0}{1}", waveform.WaveformName, waveTiming.DutyCycle_Percent);
if (waveTiming.DutyCycle_Percent <= 0)
{
throw new System.ArgumentOutOfRangeException("DutyCycle_Percent", waveTiming.DutyCycle_Percent, "Duty cycle must be greater than 0 %");
}
//Calculate various timining information
double dutyCycle = waveTiming.DutyCycle_Percent / 100;
double totalBurstTime = waveTiming.PreBurstTime_s + waveform.BurstLength_s + waveTiming.PostBurstTime_s;
idleTime = (totalBurstTime / dutyCycle) - totalBurstTime;
period = totalBurstTime + idleTime;
//Convert all time based values to sample based values
long preBurstSamp, postBurstSamp, idleSamp, enableSamples, disableSamples;
preBurstSamp = TimeToSamples(waveTiming.PreBurstTime_s, waveform.SampleRate);
postBurstSamp = TimeToSamples(waveTiming.PostBurstTime_s, waveform.SampleRate);
idleSamp = TimeToSamples(idleTime, waveform.SampleRate);
enableSamples = TimeToSamples(paenConfig.CommandEnableTime_s, waveform.SampleRate);
disableSamples = TimeToSamples(paenConfig.CommandDisableTime_s, waveform.SampleRate);
//RFSG enforces a minimum wait time of 8 samples, so ensure that the minimum pre/post burst time
// and idle time are at least 8 samples long
if (preBurstSamp < 8)
{
preBurstSamp = 8;
}
if (postBurstSamp < 8)
{
postBurstSamp = 8;
}
if (idleSamp < 8)
{
idleSamp = 8;
}
//Initialize the script StringBuilder with the first line of the script (name)
StringBuilder sb = new StringBuilder($"script {scriptName}");
sb.AppendLine();
#region Script Building
//If we have a static PA Enable mode, ensure that we trigger at the beginning of the script prior to looping.
if (paenConfig.PAEnableMode == PAENMode.Static)
{
sb.AppendLine("wait 8 marker1(7)");
}
//Configure for endless repeating
sb.AppendLine("Repeat until scriptTrigger0");
//Configure the idle time prior to each packet generation
sb.Append($"wait {idleSamp}");
//If PAEN Mode is dynamic we need to trigger the PA to enable
if (paenConfig.PAEnableMode == PAENMode.Dynamic)
{
//PA Enable is triggered at or before the last sample of the wait period
long PAEnableTriggerLoc = idleSamp - enableSamples - 1;
sb.Append($" marker1({PAEnableTriggerLoc})");
}
sb.AppendLine();
//Configure waiting for the pre-burst time
sb.AppendLine($"wait {preBurstSamp}");
//Configure generation of the selected waveform but only for the burst length; send a trigger at the beginning of each burst
sb.Append($"generate {waveform.WaveformName} subset({waveform.BurstStartLocations[0]},{waveform.BurstStopLocations[0]}) marker0(0)");
//Check to see if the command time is longer than the post-burst time, which determines when the PA disable command needs sent
bool LongCommand = waveTiming.PostBurstTime_s <= paenConfig.CommandDisableTime_s;
if (paenConfig.PAEnableMode == PAENMode.Dynamic && LongCommand)
{
//Trigger is placed a number of samples from the end of the burst corresponding with
//how much longer than the post burst time it is
long PADisableTriggerLoc = waveform.BurstStopLocations[0] - (disableSamples - postBurstSamp) - 1;
sb.Append($" marker1({PADisableTriggerLoc})");
}
sb.AppendLine();
//Configure waiting for the post-burst time
sb.Append($"wait {postBurstSamp}");
//If the ommand time is shorter than the post-burst time, the disable trigger must be sent
//during the post-burst time
if (paenConfig.PAEnableMode == PAENMode.Dynamic && !LongCommand)
{
long PADisableTriggerLoc = postBurstSamp - disableSamples - 1;
sb.Append($" marker1({PADisableTriggerLoc})");
}
sb.AppendLine();
//Close out the script
sb.AppendLine("end repeat");
//If we have a static PA Enable mode, ensure that we trigger at the end of the script prior to concluding.
if (paenConfig.PAEnableMode == PAENMode.Static)
{
sb.AppendLine("wait 10 marker1(0)");
}
sb.AppendLine("end script");
#endregion
//Download the generation script to the generator for later initiation
NIRfsgPlayback.SetScriptToGenerateSingleRfsg(rfsgPtr, sb.ToString());
//Configure the triggering for PA enable if selected
if (paenConfig.PAEnableMode != PAENMode.Disabled)
{
rfsgHandle.DeviceEvents.MarkerEvents[1].ExportedOutputTerminal = RfsgMarkerEventExportedOutputTerminal.FromString(
paenConfig.PAEnableTriggerExportTerminal);
rfsgHandle.DeviceEvents.MarkerEvents[1].OutputBehaviour = paenConfig.PAEnableTriggerMode;
//Configure scriptTrigger0 for software triggering. This way, when it is time to abort we can stop
//the loop and trigger the appropriate off command if PAEN mode is Static
rfsgHandle.Triggers.ScriptTriggers[0].ConfigureSoftwareTrigger();
}
//Configure the trigger to be generated on the first sample of each waveform generation,
//denoted in the script below as "marker0"
rfsgHandle.DeviceEvents.MarkerEvents[0].ExportedOutputTerminal =
RfsgMarkerEventExportedOutputTerminal.FromString(waveTiming.BurstStartTriggerExport);
}
public static Waveform LoadWaveformFromTDMS(ref NIRfsg rfsgHandle, string filePath, string waveformName = "", bool normalizeWaveform = true)
{
Waveform waveform = new Waveform
{
WaveformData = new ComplexWaveform <ComplexSingle>(0)
};
if (string.IsNullOrEmpty(waveformName))
{
waveformName = Path.GetFileNameWithoutExtension(filePath);
Utilities.FormatWaveformName(ref waveformName);
}
waveform.WaveformName = waveformName;
NIRfsgPlayback.ReadWaveformFromFileComplex(filePath, ref waveform.WaveformData);
NIRfsgPlayback.ReadSignalBandwidthFromFile(filePath, 0, out waveform.SignalBandwidth_Hz);
NIRfsgPlayback.ReadWaveformFileVersionFromFile(filePath, out string waveformVersion);
if (waveformVersion == "1.0.0")
{
NIRfsgPlayback.ReadPeakPowerAdjustmentFromFile(filePath, 0, out waveform.PAPR_dB);
}
else
{
NIRfsgPlayback.ReadPaprFromFile(filePath, 0, out waveform.PAPR_dB); //Version 2.0.0 and later
}
NIRfsgPlayback.ReadBurstStartLocationsFromFile(filePath, 0, ref waveform.BurstStartLocations);
NIRfsgPlayback.ReadBurstStopLocationsFromFile(filePath, 0, ref waveform.BurstStopLocations);
// If the waveform does not have burst start or stop locations stored, then we will set the burst start to
// the first sample (0) and the stop to the last sample (number of samples minus one
if (waveform.BurstStartLocations == null)
{
waveform.BurstStartLocations = new int[1] {
0
}
}
;
//Separate checks because null array throws exception when checking length
else if (waveform.BurstStopLocations.Length <= 0)
{
waveform.BurstStartLocations = new int[1] {
0
}
}
;
if (waveform.BurstStopLocations == null)
{
waveform.BurstStopLocations = new int[1] {
waveform.WaveformData.SampleCount - 1
}
}
;
//Separate checks because null array throws exception when checking length
else if (waveform.BurstStopLocations.Length <= 0)
{
waveform.BurstStopLocations = new int[1] {
waveform.WaveformData.SampleCount - 1
}
}
;
waveform.SampleRate = 1 / waveform.WaveformData.PrecisionTiming.SampleInterval.FractionalSeconds; //Seconds per sample
waveform.BurstLength_s = (waveform.BurstStopLocations[0] - waveform.BurstStartLocations[0]) / waveform.SampleRate; // no. samples / (samples/s) = len_s
if (normalizeWaveform)
{
NormalizeWaveform(ref waveform);
}
return(waveform);
}