Appendix A - Connector And Cables; Telescope Jack - Santa Barbara Instrument Group ST-i Operating Manual

Appendix A – Connector and Cables

Telescope Jack

The Telescope Jack is used to provide tracking signals to the tele-
scope drive. Viewed from outside the camera, looking in, it has the
If what you are plugging into is
voltage based you'll need an external pull-up resistor. The Common
signal is connected to the common on the four photo- transistors.
SBIG ST-i Manual
following pin-out:
The Left, Down, Up and Right
signals are driven from optically isolated
photo transistors that
conduct when telescope movement
is desired. They can sink up to
25ma and can hold off up to 25V.
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