Use this function to calculate a CBV trace from the 'average' Dopplershift. This is the same as the SPEED signal from Laser Doppler Flux monitors such as the Moor Instruments MBF3, DRT4 etc.SPEED = FLUX / CONC
where
FLUX is the frequency weighted sum of the Doppler shift spectrum.
CONC is the sum of the Doppler shift spectrum.
This function allows a comparison with Laser Doppler Flux monitors calibration standards, but should not be used normally, since it is not appropriate for measurements in single vessels.
Set the threshold to zero points where the average power level in a spectrum is too low.
The output is in calibrated kHz. The mm/s scale should not be used since this is only applicable to measurements in single vessels.