{}

Our Brands

Impact-Company-Logo-English Black-01-177x54

Welcome to the Schneider Electric Website

Welcome to our website.
How can we help you today?
Do ION7550 and ION7650 meters use cosine (cos) or sine (sin) based Fast Fourier Transform (FFT)?

The FFT decomposition in the ION7550 and ION7650 meters use a cosine based function. The latest firmware for the 7550/7650 (v350 and above) also notes in its code comments that sine inputs are rotated 90 degrees to compensate for the cosine based FFT function. In other words, they are translated into cosine functions to keep unity.



  • Date Created: October 13, 2008
    Last Revised: February 23, 2009
    Public
    Original Author: KG
    All content © 1992-2009 Schneider Electric

Schneider Electric UK

Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.