Equinox Systems GEMINI Manuel d'utilisateur Page 10
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Gemini Users Manual 5
startup or pre-determined Home position, and (4) initiate a meridian flip if possible. A
focusing feature is also available on the QuickMenu, but is only usable when an auxiliary
adapter board is connected.
1.3 What’s New in Level 4?
1.3.1 Gemini Supports Custom Mounts
In addition to support for Losmandy and Mountain Instruments mounts, Gemini L4 now
supports custom mounts. The user can setup the main parameters of his mount: the gear
ratios and direction of spur gear and worm gear and the servo motor encoder resolution.
The step resolution can reach from 0.1 arcsec per step (servo motor encoder tick) up to
2.5 arcsec/step. Resolutions can be set independently for RA and Dec. axes.
With this new feature, Gemini can be retrofitted to many German Equatorial Mounts, for
example mounts with 359:1 Byers gears, Vixen or Astrophysics mounts. Existing servo
motor/encoder combinations can often be used, eliminating the need for mechanical
adapting the Gemini motor assembly, although custom cables will be necessary.
1.3.2 Supporting the Horizontal Coordinate System
The new Level 4 software supports the usage of Azimuth and Elevation coordinates.
These coordinates can be used for queries and GoTo operations over the serial line (see
Serial Command Set below) as well as by means of the hand controller.
The HC main menu item "RA/DEC Coord." is now called "Coordinates" and contains the
additional submenu items "Az/El Display" and "Enter Az/El".
1.3.3 Selectable Serial Port Transmission Rates
Gemini L4 allows you to set several transmission rate values for the serial (RS232) and
the serial hand controller ports, from 4800 up to 38400 bit/s, under the
Setup→Communication menu item. The default value is 9600 bit/s.
1.3.4 Selectable GPS transmission rate
The GPS speed can be set to 4800 or 9600 bit/s using Setup→Communication→GPS Rx
speed menu item. The default value after a reset is the standard NMEA 0183 speed of
4800 bit/s. By setting the GPS receiver transmission rate, Gemini's startup process is
accelerated, because the other rate doesn't have to be probed. Also, the query result
message display can by interrupted by pushing the menu button.
1.3.5 Reduced Main Menu selection available
After having set up Gemini and aligning the telescope or building a pointing model, some
of the menu items are rarely used. The new "Reduced Menu" mode only displays the
main menu items normally used while observing: Object Database, Show Information,
GoTo, RA/DEC Coordinates and Identify while scrolling downwards (with the DEC-
button). Scrolling upwards with DEC+, Align Telescope is additionally included to allow
refinement of the pointing model. The other main menu items, Setup, Object Search,
Show Date/Time and GuideTo are suppressed. At any time it is possible to switch back to
Full Menu Mode using the Quickmenu feature.
- Users Manual 1
- Table of Contents 2
- 1 Introduction 6
- 1.2 Features 7
- 1.3 What’s New in Level 4? 10
- 2 Getting Started 13
- 2.2 Installation 14
- 2.2.3 Encoders 15
- 2.2.4 Power Requirements 16
- 2.3.1 Controls 16
- 2.3.3 QuickMenu 18
- 2.4 Basics of Operation 19
- 2.4.1.2 Startup Position 20
- 2.4.2 Power On and Setup 20
- 2.4.2.2 Completing Startup 23
- 2.4.2.3 Preferences 23
- 2.4.4 Normal Operation 27
- 2.5 Next Steps 28
- 3.1.2 Precession 30
- 3.2 How the Sky Moves 31
- 3.3 Tracking 31
- 3.3.1.1 Predefined Rates 32
- Training Comet Tracking 35
- Timer Values 35
- PC Controlled Tracking 36
- 3.3.2 Meridian Flip 37
- 3.3.3 RA Safety Limits 37
- 3.4 Polar Alignment 39
- 3.4.3 Accuracy Required 41
- 3.5 Mount Modeling 42
- 3.5.3 Modeling Parameters 44
- 4.2 Guiding 45
- 4.2.2 Manual Guiding 46
- 4.2.5 Software Guiding 47
- 4.3.2 The PEC Submenu 49
- 4.3.2.1 Train PEC 49
- 4.3.2.2 Clear Data 50
- 4.3.2.3 Turn PEC On/Off 50
- 4.3.2.4 Delay Correction 50
- 4.3.2.5 Drift Correction 51
- 4.3.2.6 Smooth Data 52
- 4.3.2.7 Average Data 52
- 4.4 Other Functions 53
- 5.1 Startup Mode Menu 54
- 5.2 The Main Menu 55
- 5.3 Subordinate Menu System 56
- 5.3.1.2 {Reset Alignment} 57
- 5.3.1.3 {Additional Align} 57
- 5.3.1.4 Synchronize 58
- 5.3.1.5 {Polar Al. Assist} 58
- 5.3.1.6 {Polar Axis Corr.} 58
- 5.3.2 Object Database 59
- 5.3.2.1 Database Use 59
- 5.3.2.2 Accuracy and Epochs 60
- 5.3.2.3 Credits 60
- 5.3.2.6 IC (Index Catalog) 61
- 5.3.6.1 RA/DEC Display 64
- 5.3.6.2 Enter RA/DEC 64
- 5.3.6.3 Az/El Display 64
- 5.3.6.4 Enter Az/El 65
- 5.3.6.5 Set Bookmark 65
- 5.3.6.6 {GoTo Bookmark #n} 65
- 5.3.7 Identify 65
- 5.3.8 Object Search 66
- 5.3.8.2 Wobble Object 67
- 5.3.9 Show Date/Time 67
- 5.3.9.2 Julian Date 67
- 5.3.10 Setup 68
- 5.3.10.1 Hand Controller 69
- 5.3.10.2 Mount Parameters 69
- 5.3.10.2.1 Tracking Speed 70
- 5.3.10.2.2 Moving Speeds 71
- 5.3.10.2.5 Mount Type 72
- 5.3.10.2.8 {Pointing Model} 75
- 5.3.10.3 Encoder 76
- 5.3.10.4 Alarm/Buzzer 76
- 5.3.10.5 UTC Date/Time 77
- 5.3.10.6 Credit Info 77
- 5.3.10.7 Restore Defaults 78
- 5.3.10.8 Dim Display 78
- 5.3.10.9 Geogr. Location 78
- 5.3.10.9.5 Store Site 79
- 5.3.10.9.6 Load Site 79
- 5.3.10.10 Communication 80
- 5.3.10.10.2 Sync or Align 80
- 5.4 QuickMenu 81
- 5.4.1 Focusing 82
- 5.4.4 Centering 82
- 5.4.5 Park Mount! 83
- 5.4.6 Meridian Flip 83
- 5.4.7 Exit w/o Change 83
- 6 Serial Communication 85
- 6.2 Hand Controller port 87
- 6.3 Serial Command Sets 88
- 6.5.1 Telescope Driver 90
- 6.5.3 Coordinate Epoch 90
- 6.6 Using Control Programs 91
- 7 Troubleshooting 92
- 7.2 Debug Mode 96
- 8 Appendices 97
- QuickMenu 101
- Cold Start Setup Menu 101
- *Reduced Menu 101
- 8.2 Catalogs 102
- 8.3 Alignment Star List 103
- 8.4 Serial Line Protocol 105
- • Right Ascension 112
- • Declination {+ 112
- • the object name (up to 10 112
- Gemini Native Commands 116
- 8.5 Serial Communications 129
- 8.6 Autoguider Port 130
- 8.7 Encoder Port 132
- Connecting End Switches 133
- 8.8 Feature Port 134
- 8.9 Motor Connector Pinouts 135
- RJ-45 Connector 135
- DIN Connector 135
- 8.10 Power Connector Pinout 136
- Power Connector 136
- 8.11 Upgrading the EPROM 137
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