5  Gemini Command Menu Reference 

The Gemini Menu system consists of a tree of menus and submenus displayed on the 

Hand Controller's 16 character LED display.  There is a Main Menu (the first hierarchal 

level) and several levels of submenus.  As previously described, you can scroll through 

menu choices using the up (DEC+) and down (DEC ) directional buttons on the Hand 

Controller, and move from higher menu levels to submenus by pressing the right (RA+) 

directional button (unless the RA REV button on the Hand Controller has been pressed).   

Generally, pressing the RA+ button while at the lowest level of the menu tree causes 

Gemini to select or execute the command or menu choice that is visible on the display.  

When this occurs, the display either acknowledges the choice (e.g. "FINISHED"), returns 

to a higher menu item (e.g. "Object Database"), or merely goes blank, requiring that the 

MENU button be pressed again to return to the menu system.  An exception is where the 

menu item calls for multi digit numeric input; in that case, pressing the RA+ button 

moves the input cursor 1 digit to the right.  Finally, pressing RA+ when the cursor is at 

the digit on the far right enters the input data. 

5.1  The Main Menu 

Because the Hand Controller has only a single display line, it is easy to lose track of the 

menu level at which one is looking.  For this reason, it is recommended that you 

memorize the ten items of the main (highest level) menu, and become thoroughly familiar 

with those submenus that you regularly use.  The Main Menu consists of the following: 

Align Telescope 

Object Database 

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