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Nebulosity4 and USB hubs
Folks,
For some years I have used a Lenovo Thinkpad T420 for imaging, it has two powered USB 2 ports.
I always pluged my QHY8l into one port and my ZWO 120mm guide camera into the other using the cameras in the same ports each time
A couple of weeks ago PHD2 put up the message “no ZWO camera detected”
After some head scratching and tsting cables I swapped the cameras in the USB ports and all functioned normally,
The ZWO camera is powrered by the USB port but the QHY8l has its own power supply.
My conclusion, the power supply to one of the ports has failed.
With the thought to isolate myself from this sort of problem I bought a powered USB hub
(Mbeta).
PHD2 does not mind which port on the hub the ZWO is connected to.
Nebulosity 4, my capture program, fails to see the QHY8L in any of the hub ports.
I have tried it without the ZWO plugged in but Nebulosity still does not see the QHY8L.
I am sure that others use a hub with Neb 4 so what am I missing?
Oh dear, learning curves and their large first derivative.
Chris
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