Resolved STXL-11002 darks are very bright

Discussion in 'STX and STXL' started by Kevin Ivarsen, Aug 14, 2017.

  1. Kevin Ivarsen

    Kevin Ivarsen Cyanogen Customer

    Joined:
    Oct 7, 2015
    Messages:
    8
    Hello,

    I'm working with a customer who has an STXL-11002. Open shutter images look reasonable... about 850 ADU counts of background in a 5 second exposure. However, darks produce images with very high ADU counts. For example, a 0.1 second dark gives an image with 5000 - 10000 counts across the image, and a 1 second dark saturates every pixel. Even a bias has higher ADU counts than an open-shutter image (950 - 1100 counts).

    This behavior appears to be roughly the same with the cooler turned off, or with the camera cooled to -30C. I also tried setting the preflash count to 0 but did not see any significant change. These tests were performed using Maxim DL 6.13.

    I've attached a few FITS images that show this behavior.

    Any ideas what might be happening?

    Thanks,
    Kevin
     

    Attached Files:

  2. Doug

    Doug Staff Member

    Joined:
    Sep 25, 2014
    Messages:
    6,963
    Make sure both the firmware and the driver software are up-to-date. Best to install a new driver checker because it's had upgrades related to firmware installation.

    Download location:

    ftp://ftp.sbig.com/pub/SetupDriverChecker64.exe
     
  3. Marshall Edgell

    Marshall Edgell Cyanogen Customer

    Joined:
    Jan 1, 2015
    Messages:
    53
    On checking the drivers were up to date.

    marshall
     
  4. Marshall Edgell

    Marshall Edgell Cyanogen Customer

    Joined:
    Jan 1, 2015
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    Does driver checker check the firmware?
     
  5. Colin Haig

    Colin Haig Staff Member

    Joined:
    Oct 27, 2014
    Messages:
    3,590
    Yes, there's a second tab in the SBIG Driver Checker that will connect to the camera and check firmware.
     
  6. Marshall Edgell

    Marshall Edgell Cyanogen Customer

    Joined:
    Jan 1, 2015
    Messages:
    53
    Thanks. I found it but the DriverChecker can't establish a link to the camera. The camera is open in Maxim DL. I can interrogate the camera driver from Deice manager/SBIIG USB Camera with Firmware.
     
  7. Marshall Edgell

    Marshall Edgell Cyanogen Customer

    Joined:
    Jan 1, 2015
    Messages:
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    It was the connection to Maxim that was blocking linking up.
     
  8. Marshall Edgell

    Marshall Edgell Cyanogen Customer

    Joined:
    Jan 1, 2015
    Messages:
    53
    It looks to me like the firmware update solved the problem.
    Thanks,
    marshall
     
  9. Doug

    Doug Staff Member

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    Sep 25, 2014
    Messages:
    6,963
    That's good to hear. Closed!
     

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