I am aware that the value of "envelope crossing thresold" is a parameter for calculating absoluteTOF and is not directly related to the deltaTOF calculation (correlation method).
Is my understanding correct?
As you can see in the image below, high flow rate or reverse high flow rate is displayed even though there is no water flow at all. 1Mhz transducer is used and the difference between UPS and DNS of absoluteTOF is 1μs. Therefore, we believe that this is due to the fact that the "envelope crossing thresold" value is incorrect and the absoluteTOF UPS and DNS are supplementing a lobe that is off by one.
Am I right in my thinking?
However, we do not understand why the deltaTOF value is changing as well.
I thought that even if absoluteTOF was supplementing the misaligned lobe, it would not affect the calculation of deltaTOD (correlation method), is that wrong?
