NTSpectrumPowerDoubleChannel

Spectrum power channel class. It inherits from the base class of channels NTBaseChannel. The spectrum power is calculated based on the arrays of the NTSpectrumChannel spectrum channels specified in the initializer

Description

NTSpectrumPowerDoubleChannel	Constructor. Creating a signal spectrum data channel. Creates a power spectrum data channel. Parameters: *channels* Description: spectrum channel array Data type: [NTBaseChannel] *lowFreq* Description: lower limit of the frequency of spectrum power calculation in Hz Data type: float *highFreq* *Description: upper limit of the spectrum power calculation frequency in Hz* Data type: float *duration* Description: spectrum calculation window size in seconds. Data type: double Return value: Description: Signal spectrum data channel Data type: NTSpectrumPowerDoubleChannel.
readData	Function. Channel data request. A method that returns the requested amount of data.Parameters: *offset* Description: Offset from the start of the data Data type: UInt *length* Description: The required number of signal samples. Data type: UInt Return value: Description: array of requested reports Data type: [NSNumber].
setFrequencyBand	Function. Setting the frequency limits for calculating the spectrum power. Method of setting the upper and lower limits of the frequency for calculating the spectrum power in Hz. Parameters: *low* Description: lower limit of the frequency of spectrum power calculation in Hz Data type: Float *high* Description: upper limit of the frequency of spectrum power calculation in Hz Data type: Float
setWindowDuration	Function. Setting the window size. Method for setting the size of the spectrum calculation window in seconds. Parameters: *duration* Description: spectrum calculation window in seconds Data type: Double
setOverlappingCoefficient	Function. Setting the window overlap ratio. Method of setting the coefficient of overlap of the calculation window. Values range from 0 to 1, where 0 is no overlap and 1 is maximum overlap Parameters: *overlap* Description: overlap ratio Data type: Double