4.2.1 
The Autoguider Port.............................................................................. 34 
4.2.2 
Manual Guiding..................................................................................... 35 
4.2.3 
Connecting an Autoguider to an Older Gemini .................................... 35 
4.2.4 
Connecting an Autoguider to a Newer Gemini..................................... 36 
4.2.5 
Software Guiding .................................................................................. 36 
4.3 
Periodic Error Control (PEC)........................................................................ 36 
4.3.1 
What is Periodic Error? ......................................................................... 36 
4.3.2 
The PEC Submenu ................................................................................ 37 
4.4 
Other Functions ............................................................................................. 41 
5
Gemini Command Menu Reference ...................................................................... 42
5.1 
The Main Menu............................................................................................. 42 
5.2 
Startup Mode Menu....................................................................................... 43 
5.2.1 
Cold Start............................................................................................... 43 
5.3 
Menu Reference ............................................................................................ 43 
5.3.1 
Align Telescope..................................................................................... 44 
5.3.2 
Object Database..................................................................................... 46 
5.3.3 
Show Information.................................................................................. 50 
5.3.4 
GoTo  ...................................................................................... 50 
5.3.5 
Guide 
AE
 ................................................................................. 50 
5.3.6 
RA/DEC Coordnt. ................................................................................. 51 
5.3.7 
Identify .................................................................................................. 52 
5.3.8 
Object Search ........................................................................................ 52 
5.3.9 
Show Date/Time.................................................................................... 53 
5.3.10 
Setup...................................................................................................... 54 
5.4 
QuickMenu.................................................................................................... 63 
5.4.1 
Focusing ................................................................................................ 63 
5.4.2 
Set Centering Speed .............................................................................. 64 
5.4.3 
Set Visual/Photo Modes........................................................................ 64 
5.4.4 
Park Mount............................................................................................ 64 
5.5 
Cold Start Scrolling Menu............................................................................. 64 
6
Serial Communication ............................................................................................ 65
6.1 
RS 232 Interface............................................................................................ 65 
6.1.1 
Pinout and Wiring ................................................................................. 65 
6.1.2 
Settings .................................................................................................. 67 
6.1.3 
Troubleshooting .................................................................................... 67 
6.2 
Serial Command Sets .................................................................................... 67 
6.2.1 
Meade
 LX200 Commands ................................................................. 67 
6.2.2 
Gemini Native Commands .................................................................... 68 
6.3 
Connecting a GPS Receiver .......................................................................... 68 
6.4 
Using Planetarium Programs......................................................................... 69 
6.4.1 
Telescope Driver ................................................................................... 69 
6.4.2 
Communication Port Access ................................................................. 69 
6.4.3 
Coordinate Epoch.................................................................................. 69 
6.4.4 
Coordinate Precision ............................................................................. 70 
6.5 
Using Control Programs................................................................................ 70 
6.5.1 
Gemini Control Center   GCC.............................................................. 70 
Gemini Users Manual 
ii 






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