Quote:
Originally Posted by Peter Ward
Gee...this was a while back...
I've since solve the USB3.0 Com issues with a StarTech Active USB 3.0 USB-A to USB-B Cable. (tried several other so-called "active" cables...a waste of time and money  )
The StarTech's were not too badly priced on Amazon (read about $120) and work very well.
As a result the most software that will run the camera is now stable and the maximum frame rates have increased significantly.
If the weather co-operates  I'll likely give the 183C a bit more of a workout next new moon...we shall see! |
Hi Peter,
at least you've solved it but still a test would be interesting between
low & high speed readout - if it's available in those 2 modes?
I attach a pic of my QHY9-M.
With 16 bit there are 65,536 levels and the test was done indoors as a dark frame.
You can see on the X axis that on low speed the peak noise was 1020
out of 65,536 levels.
On high speed it was 4215 peak noise out of 65,536 levels.
The background noise is normally about 4,000 to 5,000 units
so the induced noise was as great as the light pollution noise
when used on high speed!
cheers
Allan