Resolved STT-8300M Dark/Bias frames

Discussion in 'STT Series' started by DanR, Jul 30, 2021.

  1. DanR

    DanR Cyanogen Customer

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    My camera recently makes only blank images for dark or bias frames.
    Light frames, and flats are fine.
    What do you think is the problem/solution.
    Thanks
     
  2. DanR

    DanR Cyanogen Customer

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    Forgot to mention that a FW8G-STT is attached to the Set-8300M
     
  3. Colin Haig

    Colin Haig Staff Member

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    Do you mean the ADU count values are ZERO 0 for all pixels? Or do you mean something else?
    Perhaps use [Upload a File] to attach a bias frame here - raw FITS image, binned 1x1, no processing.

    If the former, give @Bill an email: Bill (at) sbig (dot) com
     
  4. DanR

    DanR Cyanogen Customer

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    Sorry, I meant ADU = 65535, total black. Same for darks and bias. I have attached a dark, didn't save a bias
     

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  5. Colin Haig

    Colin Haig Staff Member

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    Dan, that's a 600 second dark frame, and is totally saturated (white) with ADU level 65535.
    Any chance your shutter isn't working?
    Have you had a look down the nose of the camera to see if the shutter is functional?

    Any chance you recently updated the SBIG Driver Checker?
    You should have:
    SBIG Driver Checker 4.05 with sbigudrv.dll version 4.99 build 7
    IF you have sbigudrv.dll version 5.0.2.0, then see the bottom posting from me in this thread:
    https://forum.diffractionlimited.co...ow-usb-option-sbig-universal.8496/#post-46070
     
  6. DanR

    DanR Cyanogen Customer

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    I assumed shutter is working as my 600 sec light frames are good. I will check shutter.
    I will check the driver checker and follow your instructions.
    Thanks very much.
     
  7. Colin Haig

    Colin Haig Staff Member

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    BTW it's easier to check the shutter if you select a Luminance (clear) filter in the filter wheel - they you can probably actually see the CCD chip when the shutter opens, and see it disappear when it closes.
    Good luck, and let us know what you find.
     
  8. DanR

    DanR Cyanogen Customer

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    the shutter is working. I see it open and close for light frames. I also did a dark frame, it did not open. the resulting image was the same as before. 65500. I am using SBIG Driver Checker 4.05 with sbigudrv.dll version 4.99 build 7. I don't see another copy of driver checker
     
  9. Colin Haig

    Colin Haig Staff Member

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    Ok, you'll need to talk to Bill.
     
  10. FrankC

    FrankC Cyanogen Customer

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    Have same problem here. Light frames are normal. Dark frames keep shutter closed, but the ADU value for the whole frame is 65500. Bias also gives 65500. Is this a camera malfunction?

    STT-8300 T12060018
    Thanks,
    Frank
     
  11. Colin Haig

    Colin Haig Staff Member

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    Frank - contact Bill via email bill (at) sbig (dot) com
     
  12. DanR

    DanR Cyanogen Customer

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    Frank, I feel your pain. I sent my camera into Bill and after a thorough testing he reported it worked perfectly for him. Light, dark, bias, flat frames all as they should be. Turned out I needed a firmware update. The camera worked for him because his firmware was up to date. Check out your firmware version.
     
  13. FrankC

    FrankC Cyanogen Customer

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    Dan,
    Thanks so much for taking the time to reply. I will search out how to do an upgrade.

    Frank
     
  14. FrankC

    FrankC Cyanogen Customer

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    Dan,
    It worked! Thanks so much, again!
    Frank
     
  15. Colin Haig

    Colin Haig Staff Member

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    Glad to hear this! Thanks @DanR for that tip.
     
  16. DanR

    DanR Cyanogen Customer

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    Actually thanks to good ole Bill!
     
    Colin Haig likes this.

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