private void ConfigureSA()
{
transceiver.RfsaHandle.Configuration.Vertical.ReferenceLevel = saReferenceLevel;
double maxBandwidth = bandwidths.Max();
transceiver.RfsaHandle.Configuration.IQ.IQRate = 1.25 * maxBandwidth;
double actualIqRate = transceiver.RfsaHandle.Configuration.IQ.IQRate; // need to pull the actual iq rate from the driver for accurate calculation
transceiver.RfsaHandle.Configuration.IQ.NumberOfSamples = (long)Math.Ceiling(actualIqRate * dwellTime);
transceiver.RfsaHandle.Configuration.IQ.NumberOfRecords = rxFrequencyRamp.Length * numberOfRuns;
{ // automatically offset the LO outside of the band
// the DownconverterCenterFrequency property will remain constant for each step in the configuration list
if (txStartFrequency > rxStopFrequency)
{
transceiver.RfsaHandle.Acquisition.Advanced.DownconverterCenterFrequency = rxStartFrequency - maxBandwidth; // inject to the left if the rx band is below the tx band
}
else if (rxStartFrequency > txStopFrequency)
{
transceiver.RfsaHandle.Acquisition.Advanced.DownconverterCenterFrequency = rxStopFrequency + maxBandwidth; // inject to the right if the rx band is above the tx band
}
else // if none of the above then there is some band overlap
{ // find the side that is easier to inject on
double upperMargin = Math.Abs(rxStopFrequency - txStopFrequency);
double lowerMargin = Math.Abs(rxStartFrequency - txStartFrequency);
if (upperMargin < lowerMargin)
{
transceiver.RfsaHandle.Acquisition.Advanced.DownconverterCenterFrequency = rxStopFrequency + upperMargin + maxBandwidth;
}
else // prefer low side injection if the upper and lower margins are equal
{
transceiver.RfsaHandle.Acquisition.Advanced.DownconverterCenterFrequency = rxStartFrequency - lowerMargin - maxBandwidth;
}
} // the driver will throw an error if it is unable to satify the calculated downconverter center frequency
}
#if ni5644R
{ // comment out if using 5646R
transceiver.RfsaHandle.Acquisition.Advanced.DownconverterCenterFrequency = (rxStartFrequency + rxStopFrequency) / 2;
}
#endif
{ // set configuration list to loop through the carrier frequencies
RfsaConfigurationListProperties[] configurationListProperties = new RfsaConfigurationListProperties[] { RfsaConfigurationListProperties.IQCarrierFrequency };
transceiver.RfsaHandle.Configuration.BasicConfigurationList.CreateConfigurationList(band, configurationListProperties, true);
foreach (double frequency in rxFrequencyRamp)
{ // a configuration list executes in the order in which it is configured
transceiver.RfsaHandle.Configuration.BasicConfigurationList.CreateStep(true);
transceiver.RfsaHandle.Configuration.IQ.CarrierFrequency = frequency;
}
}
transceiver.RfsaHandle.Configuration.Triggers.ReferenceTrigger.DigitalEdge.Configure(referenceTriggerLine, RfsaTriggerEdge.Rising, 0);
transceiver.RfsaHandle.Utility.Commit();
}
private void ConfigureSA()
{
transceiver.RfsaHandle.Configuration.Vertical.ReferenceLevel = saReferenceLevel;
transceiver.RfsaHandle.Configuration.IQ.IQRate = 1.25 * bandwidth;
transceiver.RfsaHandle.Configuration.IQ.NumberOfRecords = frequencyRamp.Length;
transceiver.RfsaHandle.Configuration.IQ.NumberOfSamples = (int)Math.Round(dwellTime * transceiver.RfsaHandle.Configuration.IQ.IQRate);
transceiver.RfsaHandle.Configuration.Events.EndOfRecordEvent.OutputTerminal = triggerLine;
transceiver.RfsaHandle.Configuration.Triggers.ReferenceTrigger.Advanced.TriggerDelay = deskew; // reference trigger delay works even if reference trigger is not configured
transceiver.RfsaHandle.Acquisition.Advanced.DownconverterCenterFrequency = startFrequency - bandwidth; // inject to the left of the sweep band
RfsaConfigurationListProperties[] configurationListProperties = new RfsaConfigurationListProperties[] { RfsaConfigurationListProperties.IQCarrierFrequency };
transceiver.RfsaHandle.Configuration.BasicConfigurationList.CreateConfigurationList("AnalyzerSweep", configurationListProperties, true);
for (int i = 0; i < frequencyRamp.Length; i++)
{
transceiver.RfsaHandle.Configuration.BasicConfigurationList.CreateStep(true);
transceiver.RfsaHandle.Configuration.IQ.CarrierFrequency = frequencyRamp[i];
}
transceiver.RfsaHandle.Utility.Commit();
}
