Gemini Users Manual iii
5.4.3 Reduced Menu / Full Menu .................................................................. 77
5.4.4 Centering............................................................................................... 77
5.4.5 Park Mount! .......................................................................................... 78
5.4.6 Meridian Flip ........................................................................................ 78
5.4.7 Exit w/o Change.................................................................................... 78
5.5 Cold Start Scrolling Menu ............................................................................ 78
6 Serial Communication ............................................................................................ 80
6.1 RS 232 Interface ........................................................................................... 80
6.1.1 Pinout and Wiring................................................................................. 80
6.1.2 Settings.................................................................................................. 82
6.1.3 Troubleshooting Serial Communications ............................................. 82
6.2 Hand Controller port..................................................................................... 82
6.3 Serial Command Sets.................................................................................... 83
6.3.1 Meade LX200 Commands................................................................. 83
6.3.2 Gemini Native Commands.................................................................... 84
6.4 Connecting a GPS Receiver.......................................................................... 84
6.5 Using Planetarium Programs ........................................................................ 85
6.5.1 Telescope Driver................................................................................... 85
6.5.2 Communication Port Access................................................................. 85
6.5.3 Coordinate Epoch.................................................................................. 85
6.5.4 Coordinate Precision............................................................................. 86
6.6 Using Control Programs ............................................................................... 86
6.6.1 Gemini Control Center – GCC ............................................................. 86
7 Troubleshooting ...................................................................................................... 87
7.1 Common Error Cases.................................................................................... 87
7.1.1 Gemini Does Not Start.......................................................................... 87
7.1.2 Motor(s) Slew Uncontrollably on Startup............................................. 87
7.1.3 Mount Tracks in the Wrong Direction.................................................. 87
7.1.4 Stalls While Slewing or Tracking......................................................... 87
7.1.5 UTC Date or Time Setting Wrong........................................................ 88
7.1.6 GoTo or Park Commands Are Rejected ............................................... 88
7.1.7 GoTo Position is Completely Wrong.................................................... 89
7.1.8 Poor Pointing Accuracy ........................................................................ 89
7.1.9 Strange or Garbled Characters in Deluxe Hand Controller Display..... 89
7.1.10 Mount Takes Too Long to Center Object ............................................. 89
7.1.11 Mount Continuously Beeps................................................................... 89
7.1.12 Autoguider Calibration Problems ......................................................... 90
7.1.13 Gemini Displays “Autoguider Error” ................................................... 90
7.1.14 Serial Communications Problems......................................................... 90
7.1.15 "CMOS reset" Message upon Startup or Incorrect Date/Time............. 90
7.1.16 Gemini Displays “DEC/RA motor lags” .............................................. 91
7.2 Debug Mode.................................................................................................. 91
8 Appendices............................................................................................................... 92
8.1 Gemini Menus............................................................................................... 92
8.2 Catalogs......................................................................................................... 97
8.3 Alignment Star List....................................................................................... 98
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