SDSU (ARC) CCD controller documentation

5 November 2017


Following Dave Atkinson's visit to Thailand, we realised that the documentation for ULTRASPEC is in a dire state. To rectify this, Dave collated the following set of circuit diagrams and user manuals for the CCD controller boards in ULTRASPEC, as well as providing a change history document. Note that all of the drawing versions should now be correct with the exception of the power control board (ARC73). Bob Leach does not have any 6B documentation on file, but he suggests that 6C will be as good as "identical".

I've now also added the circuit diagram for the SDSU PSU (ARC80) that we use for both ULTRASPEC and ULTRACAM.


ULTRASPEC has the following boards in its 6-slot chassis:

The drawings and manuals for the various SDSU boards are below:

  1. ARC22r5D_Layout.pdf
  2. ARC22r5D_Sch.pdf
  3. ARC32r6A_Layout.pdf
  4. ARC32r6A_Sch.pdf
  5. ARC32_UsersManual.pdf
  6. ARC45r3B_Layout.pdf
  7. ARC45r3B_Sch.pdf
  8. ARC45_UsersManual.pdf
  9. ARC73r6C_Layout.pdf
  10. ARC73r6C_Sch.pdf
  11. ARCControllerHistory.pdf
  12. ARCControllerHistory.xls

  13. ARC-22: 250 Mhz Fiber Optic Timing Board, Gen III: User Manual

In November 2017, Dave configured our spare SDSU 6-slot chassis with the following spare set of boards:

We use an ARC80 (large) PSU for ULTRASPEC, the same as we do for ULTRACAM. We currently have 3 of these SDSU PSUs in Thailand. These are:

I have 3 SDSU PSU cables. Two are 10m long and one 5m long. One of the 10m long ones is currently being used on the instrument. It is showing some signs of wear in its outer sheath where it rubs against the NARIT cable twister, so I may have to replace this with the spare in the future.