Do ION7550 and ION7650 meters use cosine (cos) or sine (sin) based Fast Fourier Transform (FFT)?
Issue
What do ION7550 and ION7650 meters use for Fast Fourier Transform (FFT).
Product Line
ION7550/ION7650
Environment
Configuration
Cause
The user want to know how the meter uses FFT
Resolution
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.
Released for: Schneider Electric Canada
Need help?
Product Selector
Quickly and easily find the right products and accessories for your applications.
Get a Quote
Start your sales inquiry online and en expert will connect with you.
Where to buy?
Easily find the nearest Schneider Electric distributor in your location.
Help Center
Find support resources for all your needs, in one place.