BIMA Antenna Reconstruction

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BIMA Antenna Reconstruction
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AntennaFarm.V3
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antenna assembly

• lift pedestal onto base (CRANE)
• lift dish onto pedestal (CRANE)
• reinstall ladder (FORKLIFT)
• caulk seams, reinstall cabin insulation
  (MANLIFT)
• install door, window in base
• insulate base
• power and fiber connections through base
• install new feet on azimuth cable chain
• test az, el drives and limit switches
• reinstall TV camera
• reinstall sun shades on dish and yoke (MANLIFT)

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receiver and electronics

• install, align WVR mirrors on front truss
• install cal wheel plate, A-frame, tie rods align
  axis with subreflector
• install IF plate
• replumb lines to water chiller, test
• install VME, cPCI, pwr supply, etc in rack
• install a/d mux board on cabin wall
• test cabin temperature control
• rewire Elco connectors to subreflector
• install new fiber cable, splice patch cords on
  base end
• reinstall all cables in rcvr cabin

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dewar and cryogenics

• install new adsorber in helium compressor, purge
  run compressor on test dewar
• install compressor on platform (FORKLIFT)
• check and purge helium lines
• pump out dewar, lift up to rcvr cabin (FORKLIFT),
  install on A-frame, cool down
• install LO plates
• test computer control of telescope and rcvr
• TV pointing with frame grabber
• holography reset panels as needed