two exposures required??

[Merlin66 (Ken)]

I hope someone can help.
I now find that my ATik16ICs seems to require at least two exposures to download a new image!
I take an exposure, and after the "normal" aquisition process it displays the last previous image (!!!). I need then to take a further exposure to get the screen to update...
What the devil is going on??
I use AA5 for aquisition.
I've checked the power supply (using the Turnigy power meter) and that seems to look OK, also checked the USB connectors.
Any ideas??

[troypiggo (Troy)]

Could it be that a setting somewhere is taking an auto dark first?

[Merlin66 (Ken)]

Troy,
I've doubled checked all the settings in AA5 - doesn't appear to be taking darks or auto darks.
The image on the screen is just not updating.....

[Terry B]

Ken
I have had this happen a few times as well. It isn't consistent.
I take a neon calibration image and then take a 10 min exposure of a spectra. The image on the screen (and saved version) is the original calibration image. This means I have just wasted the 10 min exposure.
It only sometimes happens. I assume it is a failure in the camera to wipe the original image.
Don't know why it happens though.

[Merlin66 (Ken)]

Thanks Terry!
It's driving me nuts!
All 5min exposures look the same - because half of them are -THE SAME!

I've just stripped AA5 from the observatory laptop and re-installed (AA5V5.2)
Hmmmm
It now appears that the ATiK 16 is behaving itself!!!!
Let's see what happens tonight!

(Still don't know "Why?")

[Merlin66 (Ken)]

Last night Update:
Spoke to soon....
Had the same problems of double exposure before displaying updated image...
Gave up in shear disgust!!!

Today Update:
OK...another day...another challenge!
Disconnected every wire in the observatory - the USB cables to the powered hub and the hub to the laptop. Pulled all the power connectors...
Re booted the laptop...
Reconnected the hub and the USB/ power cables....
NOW it seems OK!!!!!!!!!!
I've connected and disconnected the ATik 16ICs a few times...and everytime it now works properly!
No idea what the "real" problem was, but it looks OK for the next clear night.....