FFT BACKPANEL

The FFT Backpanel interfaces the FFT Cards with the FFT Control Cards. It has the following buses through all the cards:

• Twiddle Factors for stages 1,2 and 3 of the FFTs ( 30 bits, 32MHz continuous )
• Control Word Signal ( 4 bits, during initialisation )
• The FFT Inits ( 5 bits, one clock width pulse every FFT cycle )
• The NCO Signals ( NCO control word: 3 signals during initialisation; NCO update; 4 signals during NCO update every STA cycle )
  
  

  SCHEMATIC

  GOBACK TO FFT SUBSYSTEM
  GOTO DIGITAL BACKEND