
15 - GOTO - Once the mount
is aligned use this screen to go
to any library or stored object.
More accurate positioning can be enabled by using the ADDITIONAL ALIGNMENT fea-
ture and selecting at least three objects spread across the sky in the same meridian,
and one object in the opposite meridian. Repeat steps 9~13 then press Additional
Alignment for each calibration object.
Communication with your computer
Gemini 2 can connect to a computer in several di!erent ways
RS-232 Serial Port
The traditional serial port on your PC (or a USB to RS-232 serial converter) can connect
to Gemini’s serial port #1 to send and receive commands and data using the Gemini
serial protocol. The default port settings for serial port #1 are 9600 baud, no parity, 8
bit words, 1 stop bit (9600,N,8,1). A Cable wiring diagram is located in the Gemini 2
users group at: http://tech.groups.yahoo.com/group/Gemini-II/files/Documenta-
tion_and_Manuals/Cable_Wiring_Diagrams/RS-232_Cable_Wiring_Diagram.pdf
(whole link provided in case link above does not work.)
USB Port
Alternatively, you can connect a USB cable between the USB-B connector (next to Port
F) on the Gemini 2 to a USB port on your computer. When you first plug the USB cable
in, your computer will ask you to install the driver. Make sure you’ve downloaded the
current Gemini USB driver (Windows only) and save it somewhere on your computer.
When you are prompted to install the driver, select the location where you saved it on
your computer and follow your operating system prompts to install it. On some ver-
sions of Windows, you will be prompted that the driver is not signed and potentially
unsafe. Select the option to proceed with the installation. Once the driver is installed,
Gemini will appear as a COM port on your PC. You can use any popular telescope con-
trol program that supports the Gemini serial command set. If the link above does not
work here is the full link: http://tech.groups.yahoo.com/group/Gemini-II/files/Dri-
ver_and_System_files/USB_driver/Gemini-II.inf
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