QHY8L Dark Bands

[JSeaman]

QHy8 Dark Bands

I decided to generate a new dark library last night and found some strange effects on a few pictures. I took 28x10 minute pictures and most look like 'normal.png' attached

I do, however have some banding appearing on 3 images as shown in the other attached files, any thoughts or suggestions?

James

 

[JSeaman]

I also have issues with my 50xbias frames, most are like the first 'normal' picture and there are other banding effects:

 

[JSeaman]

I'm going to check out the comms cables but I think they're well seated, this is looking like a camera issue

[ollypenrice]

Cameras are very sensitive to voltage. Most are nominally 12 volt but prefer a little more. The other obvious candidate would be the USB lead. It's always worth a simple swap to test it.

Olly

[wimvb]

I've read several posts (not just this forum) about power issues with qhy cameras. Check your power supply and cables. Keep data and power cables well separated. Also, try changing to another usb port.

[JSeaman]

I changed over the USB cable, not sure I can do much on the supply voltage though. Busy with observatory today but will try again soon