Starlight Xpress SXV-AO unit - Manual (Page 6)

Handbook for the Starlight Xpress AO unit
Issue 1 21/8/2005
Connecting up the AO electronics for STAR2000 guiding:
STAR2000 guiding does not require the OAG unit and the camera may be attached
directly to the AO. As with off-axis guiding, there is more than one way to connect up the
AO for STAR2000 use. Figure 3 shows the most likely way for most users to connect for
serial control via the PC. Other alternatives include serial control via a port divider on an
SXV output and parallel control from the RJ11 guider output of an SXV camera.
Fig 3
General pointers:
When the AO unit is first attached to the telescope, it is necessary to arrange the off-axis
guide camera, or the STAR2000 camera, so that the East – West AO axis is parallel to the
long axis of the guide image. This is easily done by viewing the guider or camera chip
through the front of the AO window. Hold the AO unit so that the two RJ11 sockets are
at the bottom and ensure that the guider chip is visible as a horizontal rectangle as seen in
the off-axis prism. A STAR2000 camera chip should also appear as a horizontal rectangle
in this view.