Hello Yossi Zana =96 It appears you are looking for the specific mathematic equation used in one of the Bessel VIs. I recommend you open the sub-VIs of the particular Bessel function you are interested in by double clicking on the VI. One of the sub-VIs will call a dll which contains the theoretical equation used.
You can also review the LabVIEW Analysis Concepts pdf file found in Help >> Search the LabVIEW Bookshelf and selecting the link to this file under the Concepts and Techniques Header. If you would like me to further investigate a Bessel equation, please let me know which Bessel VI you are interested in. Have a great day! Becky B. Applications Engineer National Instruments
