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Keypad Options Menu
Auto-Connect
These are the options that control how your Keypad will connect to your mount when you start up at the beginning of each
session. Toggle these options by pressing “1”.
● If Auto-Connect is set to “NO”, the Location Selection screen will appear when
you start up your mount. Refer to the section entitled: ”Normal Startup Sequence
for Mounts that are in the eld” in this manual.
● If Auto-Connect is set to “YES”, the Main Menu will appear. Refer to the section
entitled: Auto-Connect Sequence – For Permanent, Polar-aligned Mounts”
● If Auto-Connect is set to “EXT”, the Keypad will wait until location and time data is sent to the mount through the
serial port. Refer to the section entitled: ”External Startup Sequence – For Mounts that are Controlled by an External
Computer” for instructions regarding this feature. If you are not using external software during that session, press
Menu. The Location Selection screen will appear so that you can initialize the mount with the Keypad. Follow the
procedures in the ”External Startup Sequence – For Computer Controlled Mounts” section of the manual.
Reticle Illuminator Adjustment
The brightness of an illuminated reticle can be adjusted with the Keypad. Plug the cord of the reticle into the connector on
the GTO Servo Control Box. Note: This function is not available on the CP4.
1. Go to the Keypad Options Menu. (Main Menu → “2=Setup” → “3=Keypad Options”).
2. Press the “2” and “3” buttons to desired brightness level from 0–9. Button “3” will increase, “2” will decrease.
Focus Adjustment
If you are using an electric focuser that has a 6–9V DC motor (like the JMI Motofocus), you can control the in and out focus
movement with the Keypad. This function will only work with DC motors. You cannot operate focusers that incorporate
stepper motors with the GTO Keypad and control box. Stepper motor focuser systems (RoboFocus, OPTEC, StarLight
Instruments, etc.) will each have their own unique stepper driver and must be used with their own control devices.
Note: This function is not available on the CP4.
1. Plug the power cord of the focus unit into the CP1/2/3 Servo Control Box.
2.
Hold the “FOC” button on the Keypad with one nger and press the <PREV or NEXT> buttons to change focus.
3. To change the speed, go to Keypad Options Menu. (“2=Setup” → “3=Keypad Options”).
4. Press “4=Focus”. The rate choice will alternate (toggle) between Low and High. Note that the Low speed may not
work with some focus motors.
5. Select rate.
Special note for the lead-free GTOCP3 control boxes
(shipped to the European Union between November, 2006 and June, 2007)
In order to comply with the lead-free requirements that became effective in the European Union on July 1, 2006, Astro-
Physics redesigned the GTOCP3 control box using lead-free components. Unfortunately, we were unable to obtain an
equivalent focus motor driver chip to replace the original chip until mid 2007. As a result, 6–9V DC focus motors will not
function at both slow and fast speeds when plugged into the control box. Fortunately, these focus motors have their own
control devices so you will still be able to use them. Please read the section below for more information regarding DC
focus motor function, if you use one.
Most of the new focus motors now on the market employ stepper motors that are operated with their own controllers and
our GTOCP3 control box is not used to power them. Current models from Optec (TCFS, TCFS3), StarLight Instruments
(Digital FeatherTouch System), Technical Innovations (RoboFocus) and Finger Lakes Instruments (DF-2, PDF and Atlas)
all have stepper motors with both proprietary controllers and ASCOM compatibility. If you are using these focus units, you
will continue to use them in the same way that you always have. The reduced focus function of the GTOCP3 control box
will not impact you at all.
1=Auto-Connect: NO
2/3=Reticle: 0
4=Focus: Low
5=Keypad Update
Keypad Options Menu
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