TSpectrogram Members

The following tables list the members exposed by TSpectrogram.

	Name	Description
	Add	Add amplitude and phase of the ASpectrum to the current spectrum.
	AmpltEst	This is the overview for the AmpltEst method overload.
	AmpltSpectrum	Compute amplitude spectrum from X.
	BandFlip	Flip the frequency spectrum on the frequency axis.
	ConvergeToMaximum	This is the overview for the ConvergeToMaximum method overload.
	Copy	Copy ASpectrum to the calling spectrum.
	CopyAmplt	Copies all amplitude spectrums as rows to the destination matrix.
	CopyAmpltTransposed	This is the overview for the CopyAmpltTransposed method overload.
	CopyPhase	Copies all phase spectrums as rows to the destination matrix.
	Delete	Delete the spectrum at index i.
	Differentiate	Differentiate the signal in the frequency domain.
	Divide	Divide the calling the spectrum with ASpectrum.
	FetchTraces	Copies marked values from spectrogram to the Trace property.
	FilterPeak	Filter the peak at Marks position Index from the signal and recalculate the spectrum.
	FreqToFreqIndex	Computes range checked array indexes in the spectrum from frequency values.
	InputsDirty	If all Inputs[i] are dirty the function returns true.
	Insert	Insert spectrum at index.
	Integrate	Integrate the signal in the frequency domain.
	InternalPull	When called, the method will pass Update requests recursively to all connected objects.
	Invalidate	Notifies all connected components that this component has fresh data.
	IsNumericalInterpolationSupported	This is IsNumericalInterpolationSupported, a member of class TSpectrum.
	LogAmplt	Compute the logarithm of the amplitude spectrum and convert to dB.
	MarksToStrings	Convert marks to strings.
	MinMax	Calls MinMaxAmplt and MinMaxPhase.
	MinMaxAmplt	Find minimum and maximum value of the Amplt spectrum.
	MinMaxPhase	Find minimum and maximum value of the Phase spectrum.
	Move	Move spectrum from SrcIdx to DstIdx index.
	Mul	Multiply the calling the spectrum with ASpectrum.
	NF	Calculates the average of the noise.
	ParamUpdate	The method can be assigned to some other component even handler, as a notification that a parameter has changed and that Self should consider a recalculation.
	PeakApproximate	Return the peak closest to the Freq frequency.
	PhaseEst	This is the overview for the PhaseEst method overload.
	PhaseSpectrum	Compute phase spectrum from X.
	PipeReset	Recursively processes all connected components backward and calls Reset method.
	PowerSpectrum	Compute power spectrum from X.
	Pull	Request recalculation of the entire chain of all connected components.
	PullUntilEnd	Calls Pull until pipeEnd is returned.
	Reset	Reset the spectrogram and delete the stored data.
	RMS	Returns the RMS of the spectrum.
	RMSSpectrum	Compute RMS spectrum from X.
	Rotate	Rotate spectrums down or up in the list.
	Scale	Scale the calling spectrum with Factor.
	SetZero	Initialize spectrum to zero.
	SFDR	Spurious-free-dynamic-range computes the ratio of the largest marked peak towards the second largest.
	SINAD	Signal-to-noise-and-distortion calculates the the ratio of the maximum mark towards the rest (noise).
	Size	Assign Length, Complex and SamplingFrequency properties.
	SNR	Calculates the signal-to-noise ratio.
	Sqr	Square the Amplt and Phase of the ASpectrum and copy it to self.
	Subtract	Subtract ASpectrum from the calling spectrum.
	THD	Returns the ratio of RMS of the marked peaks, excluding the first, towards the first marked peak and returns the result in [%].
	THDN	The total-harmonic-distortion-and-noise computes the sum of sqares of the rest towards the maximum marked peak.
	Update	Request recalculation of the data and place the result in Self.
	UpdateAllTraces	Updates marks for all spectrums then calls FetchTraces.
	UpdateNotify	Call this method only, if SuspendNotifyUpdate is True.
	UpdateTraceParameters	Propagates settings of Peaks and Bands properties to all spectrums.
	ValuesToStrings	Convert values to strings.

Public Properties

	Name	Description
	Averages	Used to store the number of averages made.
	BandwidthH	Returns the upper bandwidth edge of the signal.
	BandwidthL	Returns the lower bandwidth edge of the signal.
	ConjExtend	If True, the conjugate symmetric part of the frequency spectrum is to be computed.
	ConjFlip	If True, the conjugate symmetric part of the frequency spectrum will be placed in 0.5..1.0 Fs (as returned by the FFT), and not between -0.5..0.0 Fs.
	Count	Specifies the number of the spectrums in the list.
	Descriptor	This is Descriptor, a member of class TStaticSpectrumAnalyzer.
	IsSpectrumAnalyzer	Returns true, if the descendant class is derived from TSpectrumAnalyzer.
	ItemNumber	Number to label the object when it is an item in the List.
	Marks	Stores the frequency, amplitude and phase of selected frequency bins.
	MaxAmplt	Stores the maximum value of the Amplt spectrum found by the MinMaxAmplt method.
	MaxFreqIndex	Holds the index at which the maximum amplitude was found by the MinMaxAmplt method.
	MaxPhase	Stores the maximum value of the Phase spectrum found by the MinMaxPhase method.
	MinAmplt	Stores the minimum value of the Amplt spectrum found by the MinMaxAmplt method.
	MinPhase	Stores the minimum value of the Phase spectrum found by the MinMaxPhase method.
	PipeState	Returns the state of the pipe after the last update.
	SpectralSamplingTime	Total length in seconds between the first and the last spectrum.
	SpectralTimeOffset	Time in seconds at which the spectrogram starts.
	Spectrum	Returns spectrum at index i.
	SuspendNotifyUpdate	Set this property to True, to prevent calling OnNotifyUpdate from the Update Method.
	Trace	Containes parameters and results for individual traces.
	UsesInputs	Set it to True to indicate, that valid signals will be connected to the Input or Inputs properties.

Published Properties

	Name	Description
	Active	Set active to false to suppress the propagation of the Pull request and the subsequent call to the Update method.
	Amplt	Stores the amplitude of the spectrum.
	Bands	Holds the parameters for the frequency bands.
	BandWidth	Returns the bandwidth of the spectrum in [Hz].
	Complex	Set this property to true, to request computation using complex numbers.
	Continuous	If True, the component will pass on the udpate request to the connected component.
	Dt	Returns the distance in seconds between two consecutive samples of the signal on which the frequency spectrum is based.
	FloatPrecision	may not have default to allow switching of default precision
	FloatPrecisionLock	Set this property to true to lock changes to FloatPrecision property.
	Harmonics	Defines number of harmonics to be used when calculating statistical parameters from the amplitude spectrum.
	HzRes	Returns the frequency resolution in Hz.
	Input	Specifies Input for the data to the component.
	IsDouble	may not have default to allow switching of default precision
	Length	Defines the length of the spectrum.
	Logarithmic	If true, the stored spectrums will be converted to Logarithmic scale.
	LogSpan	Defines the span of the logarithmic spectrum in dB.
	MainlobeWidth	Defines the width of the main lobe. Each frequency component in the frequency spectrum should theoretically be infinitely thin.
	MaxSpectrumCount	Maximum number of spectrums up to which the spectrogram will grow.
	NarrowBandH	Specify value other than 0 to indicate the final frequency of the reduce bandwidth.
	NarrowBandL	Specify value other than 0 to indicate the start of the reduced bandwidth.
	OnAfterUpdate	The event is triggered after the call to the Update method.
	OnBandsUpdate	If assigned, this event will be called instead of a call to Bands.Update method.
	OnBeforeUpdate	The event is triggered just before the call to the Update method.
	OnDisplayUpdate	The event is triggered after the OnAfterUpdate event. Use this event to update any associated charts or graphs or result tables.
	OnGetInput	If the Input property is not assigned, the component will call OnGetInput.
	OnNotifyUpdate	The event is called after a call to InternalUpdate, OnAfterUpdate and OnDisplayUpdate from within the Update method.
	OnParameterUpdate	The event is triggered when ParamUpdate method is called. The ParamUpdate method is usually called by component editors when a value was changed by the user and the editor was "Live".
	OnPeaksUpdate	If assigned, this event will be called instead of a call to Peaks.Update method.
	Peaks	Pointer to the component that manages peak analysis.
	Phase	Stores the phase of the spectrum.
	PhaseMode	This property determines how to handle the phase of the frequency spectrum.
	PhaseRange	Specify the range of the phase spectrum.
	PhaseUnits	Defines the units of phase. (radian, degrees).
	Report	Holds the parameters needed to generate a spectrum analysis report. Requires that the descriptor property is properly filled up.
	SamplingFrequency	Defines the sampling frequency of the signal on which the frequency spectrum is based.
	SamplingTime	Defines the length of the signal on which the frequency spectrum is based in seconds.
	SpectralDt	Time in seconds between consecutive spectrums.
	SpectralSamplingFrequency	Sampling frequency with which the spectrums are being sampled. When setting this property Dt is automatically updated.
	TraceOnly	Specifies to track only marked peaks without entire spectrums.
	ZeroPadding	Defines the level of zero padding of the source signal.

Links

TSpectrogram Class, Legend, Public Methods, Public Properties, Published Properties

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