Quote:
Originally Posted by Merlin66
Martin,
No not really......
I'm looking at actual performance as measured by FireCapture/ Sharpcap etc. using a 5mtr USB3 cable.
The ROI I use on the ASI 178 is 3000 x 200 pixel.
The ASI 120 equivalent would be 1200 x 200 pixel.
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Hi Ken,
What is the highest speed so far you have achieved with the 3000 x 200 ROI? What cable was that with? Will it do 200fps with the ZWO supplied standard 2m (black) cable at 3000 x 200?
The reason I ask is that at 200fps and at a 3000 x 200 ROI it seems like it very much would be at (maybe over) the limit of what seems possible based on ZWO's maximum reported frame rates at the various supported resolutions/ROIs especially if using it in 14 Bit mode (maybe OK at 10bit), based on ZWO's data for the 174mm in the table below. That is based on an assessment of the maximum bitrates associated with the various ROIs tabulated in comparison with what you are going for. In any event, high data transfer rates coupled with longish cable lengths are not going to make things easier.
Best
JA
Another suggestion, just in case, try it with a freshly installed driver and/or try running the camera via ZWO's capture software to see if that makes any difference.