Orion XTG Appendix B RS-232 Connection, Additional RS-232 Commands Sending a Tracking Rate

Page 30

Appendix B: RS-232

Connection

The SkyQuest XTg Mount is designed to receive commands sent from a computer’s RS-232 COM port (via the computer interface cable). The hand controller will communicate with the computer at 9600 bits/sec, no parity, no stop bit. All angles are communicated with 16 bits and communicated using ASCII hexadecimal. The chart below shows the ASCII commands from the PC, and what the hand controller’s response will be.

Additional RS-232 Commands

Sending a Tracking Rate

1.Multiply the desired tracking rate (arcseconds /second) by 4. For example: if the desired track rate is 120 arcsec- onds/second (approximately 8 times sidereal rate), then the TRACKRATE = 480.

2.Separate TRACKRATE into two bytes, such that (TRACKRATE = TrackRateHighByte*256 + TrackRateLowByte). For example, if TRACKRATE = 480, then TrackRateHighByte = 1 and TrackRateLowByte = 224.

3.To send a tracking rate, send the following 8 bytes:

a.Positive Azm tracking: 80, 3, 16, 6, TrackRateHighByte, TrackRateLowByte, 0, 0

b.Negative Azm tracking: 80, 3, 16, 7, TrackRateHighByte, TrackRateLowByte, 0, 0

c.Positive Alt tracking: 80, 3, 17, 6, TrackRateHighByte, TrackRateLowByte, 0, 0

d.Negative Alt tracking: 80, 3, 17, 7, TrackRateHighByte, TrackRateLowByte, 0, 0

4.The number 35 is returned from the hand controller.

Sending a Slow-GoTo Command

1.Convert the angle position to a 24 bit number. Example: if the desired position is 220, then POSITION_24BIT = (220/360)*224 = 10,252,743

2.Separate POSITION_24BIT into three bytes such that (POSITION_24BIT = PosHighByte * 65536 + PosMedByte

*256 + PosLowByte). Example: PosHighByte = 156, PosMedByte = 113, PosLowByte = 199

3.Send the following 8 bytes:

a.Azm Slow Goto: 80, 4, 16, 23, PosHighByte, PosMedByte, PosLowByte, 0

b.Alt Slow Goto: 80, 4, 17, 23, PosHighByte, PosMedByte, PosLowByte, 0

4.The number 35 is returned from the hand controller.

Resetting the Position of Azimuth or Altitude

1.Convert the angle position to a 24bit number, same as Slow-Goto example.

2.Send the following 8 bytes:

a.Azm Set Position: 80, 4, 16, 4, PosHighByte, PosMedByte, PosLowByte, 0

b.Alt Set Position: 80, 4, 17, 4, PosHighByte, PosMedByte, PosLowByte, 0

3.The number 35 is returned from the hand controller.

30

Page 29 Page 31
Image 30
Page 29 Page 31
Contents Orion SkyQuest XTg GoTo Dobsonians Overview of SkyQuest XTg Dobsonian 12 shown Table of Contents Parts ListUnpacking Box #2 Dobsonian Base Refer to Figures 3 Base hardware for SkyQuest XTgAssembly Assembly of the Dobsonian BaseAssembly of the Optical Tube XT12g Only Shaft Spring EZ Finder Connecting the Optical Tube to Dobsonian BaseAccessory Installation Operating the EZ FinderReplacing the Battery Using EyepiecesAligning the EZ Finder GoTo Hand Controller Scroll Buttons Setup for AutoTracking or GoTo ModeSetup for AutoTracking or GoTo Mode Dual Purpose buttonsUsing the Telescope AutoTracking Mode Alignment for GoTo OperationBrightest Star Alignment SW 235SE Two-Star AlignmentSelecting an Object Using the Telescope in GoTo ModeObject Database in the Hand Controller Pointing Accuracy Enhancement PAEOther Functions Utility FunctionsSetup Functions TrackingPage Recalling a user-defined object Using the User Defined DatabaseSaving an object to the database Identifying an Unknown ObjectLinking with a Computer Disconnecting from the ComputerPreparing the Computer for the Update Updating the GoTo Hand Controller’s FirmwarePreparing the Telescope for Collimating Collimating the Optical SystemCollimation Cap and Mirror Center Mark Aligning the Secondary MirrorFocusing the Telescope Using Your TelescopeStar-Testing the Telescope Aligning the Primary MirrorMagnification Viewing with EyeglassesAiming/Pointing the Telescope 1200mm = 42x 28mmAstronomical Observing Astronomical Objects MoonCare and Maintenance Cleaning Eyepiece LensesCleaning Mirrors Specifications SkyQuest XT8gSkyQuest XT10g SkyQuest XT12g Menu Tree Appendix a Time Zones of the World Resetting the Position of Azimuth or Altitude Additional RS-232 Commands Sending a Tracking RateSending a Slow-GoTo Command Appendix B RS-232 ConnectionStar Charts Page Page Page Page Page One-Year Limited Warranty

XTG specifications

The Orion XTG is at the forefront of technological innovation, designed to meet the demands of modern users seeking both performance and versatility. This state-of-the-art device is particularly appealing to gamers, content creators, and professionals due to its impressive range of features and capabilities.

One of the main aspects of the Orion XTG is its powerful hardware configuration. Integrated with the latest high-performance processors, it ensures smooth and efficient operation, allowing users to tackle even the most demanding tasks without any lag. The device is equipped with advanced graphics capabilities, enabling crisp, high-resolution visuals that elevate the overall experience, whether for gaming or multimedia applications.

Performance is further enhanced by the Orion XTG's ample memory and storage options. With high-speed RAM and spacious SSD solutions, users can enjoy quick loading times and plenty of room for applications, games, and files. The SSD configuration also contributes to energy efficiency and reduced heat generation, making it a sustainable choice for long gaming or working sessions.

The Orion XTG stands out with its cutting-edge cooling technologies. Featuring an advanced cooling system, it utilizes both active and passive cooling mechanisms to maintain optimal temperatures during intense usage. This innovative design minimizes the risk of overheating, thereby prolonging the lifespan of the components and ensuring consistent performance.

Another significant highlight of the Orion XTG is its connectivity options. With multiple USB ports, HDMI, and advanced wireless capabilities, it enables seamless connections to various peripherals, including monitors, external storage devices, and other accessories. This adaptability makes it a perfect fit for a multitude of setups, whether for gaming, graphic design, or general productivity.

User experience is paramount in the Orion XTG's design, featuring a sleek and ergonomic build that enhances usability and comfort. The intuitive interface and customizable settings allow users to tailor their experience, making it easy to switch between tasks or enhance gaming performance based on individual preferences.

In summary, the Orion XTG combines high-performance hardware, advanced cooling solutions, extensive connectivity options, and an ergonomic design. Whether for gaming, content creation, or professional applications, the Orion XTG embodies a perfect blend of functionality and style, catering to a diverse range of users and their specific needs. With its focus on innovation and performance, the Orion XTG is poised to be a standout choice in its category.
Top Page Image Contents