I have an eq3 synscan. When setting the handcontrol in pc-direct mode, one can move the mount with the pc via eqmod.
One also can set the mount to tracking via eqmod..
If one then presses the direction buttons of the synscan hand control (or sets the slewing rates), the mount will move, even if the handcontrol was in pc-direct mode. But after slewing with the handcontrol, eqmod will stop to track.
That the scope can be moved with the handcontrol in pc direct mode is a good thing. There are some people (e.g. me) who have the mount in the garden connected to a computer in my home. I use eqmod with phd guiding, which can be done by my pc automatically. But for aligmnent, I must still look through my scope. As the pc is in my home and the scope is in the garden, I do the slewing for aligment with the handcontrol.
But after one has pressed the direction buttons or set a slewing rate with the handcontrol in pc-directmode, eqmod stops tracking and one must re-activate the tracking function via pc. That way, one can not align the mount properly, since the star has moved away, when I' able to add it on the eqmod pointlist
eqmod should be modified, so that the synscan handcontrol still moves the scope, but does not stop the tracking process of eqmod?