Specifications

SBIG STF-8300 Manual

Appendix A – Connector and Cables

Power Jack

The Power Jack is used to supply 10.0 – 14.5 Volts DC at 3 amps to

the camera. The jack is locking and center-positive. The mating plug

is the locking model Switchcraft S760K with 0.218 inch outer diameter

and 0.080 inch inner diameter (5.5/2.0 mm).

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

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.

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. The

Special signal is discussed below.

Jumper Options

By removing the back of the camera you’ll find two jumpers adjacent

to the Telescope Jack that have the following affect:

J9 Pin 1 to 2 – When in place

connects the Common signal to the

minus side of the power source,

effectively grounding the Common.

J9 Pin 3 to 4 – When in place makes

the raw positive power source (~12V)

available on the Special signal. You

can use this for powering an external

relay box. Do not connect to your telescope with this jumper in place

as you will damage the telescope or camera.

Telescope

Jack

LED