What is the Correct Syntax for Implementing the Atan Function on the DL850?

The correct syntax for implementing the Atan function on the DL850 is ATAN(C1).There is a typo in the DL850 IMDL85001EN 4thEd Features Guide, ATAN(C1,C2) is in-correct. However, the syntax for the DL750 IS ATAN(C1,C2).
The Atan function on the DL850 calculates the arc tangent of the waveforms from Source 1 and Source 2, and outputs an angle in radians within ±π. This differs from typical Atan functions, which calulates the inverse tangent of a number. The formula for Atan calculation on the DL850 is:

                    Angle = Atan(s1/s2)

where s1 and s2 is the equivalent sampled data from Source 1 and Source 2.

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