
RETICLE Connector
If you wish to use the illuminator cable for our polar alignment scope or plug-in-type guiding eyepiece with an illuminated
reticle (available from several manufacturers), insert the 3.5mm phono plug into this connector for power. Reticle brightness
can be adjusted with the hand control. Refer to the section pertaining to reticle illuminator adjustment in the GTO Keypad
manual for further information.
AUTOGUIDER Connector
This connector interfaces with the RJ-11-6 modular jack of an autoguider cable, purchased separately or as part of a CCD
Imaging Camera or Autoguider. The autoguider will be functional and ready to go as soon as you plug it in. Please refer to
the appropriate manual from the manufacturer for operation of the autoguider.
+6V Connector
This 6-volt output accepts 3.5mm phone plugs. It’s original purpose was to power the Pentax 6x7 camera directly from the
mount. Its most common usage today is to power the StarGPS. It has also been used to power BlueTooth units for wireless
connection to the mount’s COM ports. Center is positive. It will supply up to 200mA of current. Be sure of your device’s
power requirements and polarity before attaching!
N and S Switch
Select northern (N) or southern (S) hemisphere as needed. When you slide the switch to the opposite position, the tracking
direction of the drive will reverse. The power cord must be removed and re-attached to make this work.
Drainage Holes
Two holes are drilled into the lower portion of the bottom of the control box. These holes allow excess moisture to drain from
your control box, particularly useful on dewy nights. Please do not plug these holes.
Pre-loaded PEMPro Curve
Your mount was tested at our production facility with a special version of PEMPro Periodic Error Management Software.
After ensuring that the mount’s uncorrected periodic error is within our specifications of 7 arc-seconds peak-to-peak, we
generate a unique optimized PE curve for your specific mount, and then save the corresponding PE correction curve to the
GTOCP3 control box for you to use. By turning PE on from the keypad, you can take advantage of this PE curve the very
first time you use your mount. This PE curve should remain valid for several months as your gears “run in” and will probably
suffice for many mount owners. Instructions for turning the PEM on in the keypad’s “Tools” menu are found in the keypad
manual.
If you decide to purchase PEMPro in the future, it is suggested that you save the existing curve to your computer before
overwriting it in the control box with a new curve, just in case you do something wrong in your first attempt at a PEMPro run.
That way, you can re-load the old data back to your control box if needed.
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