FFT stands for FastFourier Transform and the FFT system performs the same on the signals coming from the ADC System. It performs the following tasks:
1.Applies a time-domain window on the data,
2.Compensates for the fringe phase,
3.Performs a DFT on the input data and,
4.Compensates for the fractional delay difference.
The FFT subsystem is made up of these sections viz:
1.The FFT Card
2.The FFT Control Card
3.The FFT Backpanel
4.FFT Power Supply
5.FFT Clock Distribution
6.FFT Testing Procedures
7.FFT Packaging