Assembling the lab system, Jan-Apr 2002


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  1. D/A board bringup station
  2. D/A board under evaluation
  3. A/D board bringup station
  4. A/D board operates at speed 1.5GHz
  5. 256M DDR modules
  6. Thad's FPGAs
  7. Thad working on the A/D board
  8. Dale's fiber optic lab
  9. 10Ghz modulator
  10. Quadrature modulator setup
  11. Photodetectors sitting on top of heat sinks (lasers at top)
  12. Dual laser unit
  13. Assembling the D/A rack
  14. D/A cabinet with power supplies and Steve's control box
  15. Starting assembly of A/D rack
  16. A/D rack power supplies
  17. The A/D cardcage backplane
  18. 11mm wrench next to back plane 3.3V and gnd power bars
  19. A/D rack power supplies
  20. Heavy duty cables
  21. Populated A/D card cage
  22. Wiring D/A cardcages to power supplies
  23. Sided of D/A card cage sealed to direct airflow
  24. Fiber loop control box (loop switch, 2x2 coupler, Newport tunable filter)
  25. Spools of fiber for lengths 20, 40, 60, 80, 100, 120km
  26. Ring bus card in a PC
  27. Photodetector
  28. D/A connections for AM transmission test
  29. Combiner RF
  30. Combiner filters with foam insolation
  31. Combiner RF assembly
  32. System with combiner mounted temporarily
  33. Close-up of combiner attatched to brass insulated filter stack
  34. Dale assembing the photodetectors
  35. Splitter assembly wired to the system for testing
  36. Close-up of splitter filter stack with outputs going to A/D rack
  37. Siva testing the d/a subsystem
  38. Close-up of splitter with 3 photodetectors on top aluminum plate (splitter in rack)
  39. Widgeon board used for achieving quatrature lock
  40. Lab system in 5 x 7' racks (May 4 2002)
  41. Rack 1, left rack, house the D/A cards, rack 2 houses the combiner
  42. Rack 3, center rack, house the fiber amps (one removed), fiber loop control box, laser, PC and 100Km SM fiber
  43. Rack four house the two splitters, and rack 5 houses the 17 A/D boards in two card cages
  44. Pre/post transmission compute farm