AIDA Front end electronics

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AIDA Front end electronics

• Report May 2008
• Progress
• Data compression
• Plan for prototype delivery

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Progress

• Investigating Buffer and FADC PCB layout
• Checking detector connection board routing.
• Specification for utility interface - Metronome
• Power supply (50W) options 12v distribution
• FADC interface DDR to parallel conversion

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Compression

• Max data rate for FEE Gbit link 60MB/sec.
• Waveforms are the major contributor to this
  demand.
• Compress the waveforms as they are transferred
  between memories in the FPGA

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Compression for AIDA
Compared lossless methods. 8 sample data sets, 3
types. Each file 128MBytes, compressed in 2000
word chunks.

• Low noise
• Noisy
• Periodic

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Compression for AIDA

• Several techniques looked at.
• Varying results, all data dependent.
• Home-grown method as good as others for this
  data.
• Knowledge of data format/structure.

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Compression for AIDA

• MinimumOffset (MO), Data Dictionary (DD), No
  Compression (NC).
• MO usually best, DD best for noisy data.
  Sometimes NC best.
• All improved when bit-packed.
• Recommend MinimumOffset with fallback to No
  Compression

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Milestones for Prototype FEE delivery

• Complete Specification
• 1st July 2008 gt low risk
• Complete Schematic and PCB layout
• 1st Aug 2008. gt medium risk
• Deliver 6 FEE cards ( 6 weeks )
• 15th Sept 2008 gt low risk
• Complete Prototype VHDL
• 1st November 2008 gt Medium risk
• Commission FEE cards
• 1st December 2008 gt High risk

• Design ASIC Mezzanine
• 1st Aug 2008. gt medium risk
• Deliver 6 ASIC Mezzanines
• 15th Sept 2008 gt low risk
• Complete Kapton board
• 1st Nov 2008 gt low risk

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