Celestron C8-NGT, C10-N manual Appendix D RS-232 Connection

Page 60

Appendix D - RS-232 Connection

You can control your telescope with a computer via the RS-232 port on the computerized hand control and using an optional RS-232 cable (#93920). Once connected, the telescope can be controlled using popular astronomy software programs.

Communication Protocol:

The Advanced GT communicates at 9600 bits/sec, No parity and a stop bit. All angles are communicated with 16 bit angle and communicated using ASCII hexadecimal.

Description

PC Command ASCII

Hand Control Response

Notes

Echo

Kx

X#

Useful to check communication

Goto Azm-Alt

B12AB, 4000

#

10 characters sent. B=Command,

 

 

 

12AB=Azm, comma, 4000=Alt. If

 

 

 

command conflicts with slew limits,

 

 

 

there will be no action.

Goto Ra-Dec

R34AB, 12CE

#

Scope must be aligned. If

 

 

 

command conflicts with slew limits,

 

 

 

there will be no action.

Get Azm-Alt

Z

12AB, 4000#

10 characters returned,

 

 

 

12AB=Azm, comma, 4000=Alt, #

Get RA-Dec

E

34AB, 12CE#

Scope must be aligned

Cancel Goto

M

#

 

Is Goto in Progress

L

0# or 1#

0=No, 1=Yes; "0" is ASCII

 

 

 

character zero

Is Alignment Complete

J

0# or 1#

0=No, 1=Yes

Commands below

 

 

 

available on version 1.6

 

 

 

or later

 

 

 

HC version

V

22

Two bytes representing V2.2

Stop/Start Tracking

Tx

#

Alt-Az tracking requires alignment

 

x = 0 (Tracking off)

 

 

 

x = 1 (Alt-Az on)

 

 

 

x = 2 (EQ-N)

 

 

 

x = 3 (EQ-S)

 

 

32-bit goto RA-Dec

r34AB0500,12CE0500

#

 

32-bit get RA-Dec

e

34AB0500,12CE0500#

The last two characters will always

 

 

 

be zero.

Commands below

 

 

 

available on version 2.2

 

 

 

or later

 

 

 

32-bit goto Azm-Alt

b34AB0500,12CE0500

#

 

32-bit get Azm-Alt

z

34AB0500,12CE0500#

The last two characters will always

 

 

 

be zero.

The cable required to interface to the telescope has an RS-232 male plug at one end and a 4-4 telephone jack at the other end. The wiring is as follows:

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Contents Advanced Series Advanced Series GT Precise GoTo Scope Setup Features Telescope Maintenance Page Advanced Series Newtonian Advanced Series GT Newtonian Setting up the Tripod Attaching the Equatorial MountInstalling the Counterweight Bar Attaching the Center Leg BraceInstalling the Counterweight Attaching the Hand Control Holder Advanced GT Models OnlyAttaching the Telescope Tube to the Mount Installing the Finderscope Installing the EyepiecesTelescope Balancing the Tube in R.A Telescope Tube CompletelyAdjusting the Mount Adjusting the Mount in AltitudePowering the Telescope Attaching the Declination Cable For GT Models OnlyAdvanced GT Hand Control Hand Control Operation Alignment Procedures Startup ProcedureAuto Align Auto Three-Star AlignQuick-Align Last AlignmentRe-Alignment Object Catalog Selecting an ObjectTour Mode Setup Procedures Nine available slew speedsIdentify Scope Setup Features Observing Tip Helpful Hint Utility Features Helpful Hint Advanced GT Image Orientation Focusing Aligning the FinderscopeCalculating Magnification Determining Field of View General Observing HintsCelestial Coordinate System Motion of the Stars Latitude Scales Pointing at PolarisFinding the North Celestial Pole Declination Drift Method of Polar Alignment Observing the Moon Lunar Observing HintsObserving the Planets Observing the SunSolar Observing Hints Observing Deep Sky ObjectsSeeing Conditions TransparencyPage Piggyback Short Exposure Prime Focus Photography Terrestrial Photography MeteringReducing Vibration Auto Guiding Care and Cleaning of the Optics CollimationAligning the Secondary Mirror Aligning the Primary Mirror Night Time Star Collimating Page Page Page Page Appendix a Technical Specifications Appendix B Glossary of Terms Page Eclipsing or obscuring the brightness of the star Appendix C Longitudes Latitudes Georgia Minnesota Rhode Island Canada Appendix D RS-232 Connection Additional RS232 Commands Reset The Position Of Azm Or AltAppendix E Maps of Time Zones Page Page Page Page Page Page Page Celestron TWO Year Warranty
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C10-N, C8-NGT, C8-N specifications

The Celestron C8-NGT, C8-N, and C10-N telescopes represent a range of superior astronomical instruments that cater to both novice and experienced astronomers alike. Among these, the C8-NGT combines the advanced features of a computerized telescope with the simplicity of a Newtonian design. Its 8-inch aperture allows for impressive light-gathering capability, making it ideal for observing distant galaxies, star clusters, and nebulae. The GoTo mount enhances usability, enabling users to locate celestial objects effortlessly with the push of a button.

The C8-N, also featuring an 8-inch aperture, stands out with its open tube design that provides maximum airflow and minimizes thermal issues, ensuring optimal performance. The scope is designed with user-friendly adjustments and a sturdy equatorial mount, allowing for smooth tracking of celestial objects. Its high-quality optics provide sharp images and incredible clarity, making it suitable for both planetary and deep-sky observations.

On the other hand, the C10-N is the largest in this lineup, boasting a 10-inch aperture that dramatically enhances its light-gathering ability. This larger size makes the C10-N a powerhouse for serious astronomers looking to explore fainter objects and intricate details within astronomical features. Like the C8-N, it employs a Newtonian reflector design, allowing for a compact and manageable profile, while still providing stunning visuals across a range of celestial bodies.

All three telescopes incorporate Celestron's commitment to creating durable, robust, and user-friendly systems. They utilize premium quality glass and optics, which are coated to improve light transmission and provide high-contrast images. Additionally, they are designed with ease of assembly and portability in mind, catering to astronomers who enjoy observing in various locations.

The Celestron C8-NGT, C8-N, and C10-N serve as excellent options for anyone looking to deepen their astronomical pursuits, offering a blend of advanced technology, high-quality optical performance, and user-friendly features. Whether you're a beginner eager to peer into the wonders of the universe or an experienced observer at the peak of your skills, these telescopes offer a remarkable means to expand your cosmic horizons. With precision engineering and thoughtful design, Celestron continues to be a trusted name in the world of astronomy.
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