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.

Related Products & Solutions

Data Acquisition (DAQ)

Yokogawa data acquisition systems give you the most flexibility and power to measure, display, store, and even actuate any number of physical or electrical phenomena.

High Speed Data Acquisition

Yokogawa high speed data acquisition systems deliver industry leading isolation, bit resolution, sampling rate, and memory depth, with independent channel hardware and easy to use software.


World-class digital oscilloscopes from Yokogawa: The digital oscilloscopes have high-speed sampling and a wide range of bandwidths that can be utilized for design and development of electronic devices. The ScopeCorders have the advantages of both a digital oscilloscope and a multi-channel data recorder.


A ScopeCorder is an instrument combining a mixed signal oscilloscope and portable data acquisition recorder into a modular platform designed to capture both high-speed transients and low-speed trends. Yokogawa’s ScopeCorder product family provides flexible and high-performance multi-channel test instruments by combining a variety of signal conditioning input modules, onboard calculations, and deep data acquisition storage into an off-the-shelf data acquisition solution.