INSTRUCTION MANUAL CGE800 ● CGE925 ● CGE1100 ● CGE1400
INTRODUCTION..................................................................................................................................................................................4 Warning ..............................................................................................................................................................................................4 ASSEMBLY ...............................................................................................................
Goto Alt-Az ............................................................................................................................................................................28 Hibernate.................................................................................................................................................................................28 Turn On/Off RTC.........................................................................................................................
Congratulations on your purchase of the Celestron CGE telescope! The CGE ushers in the next generation of computer automated telescopes. The Celestron CGE series continues in this proud tradition combining large aperture optics with the sophistication and ease of use of our computerized GoTo mount. If you are new to astronomy, you may wish to start off by using the CGE's built-in Sky Tour feature, which commands the CGE to find the most interesting objects in the sky and automatically slews to each one.
Figure 2.1 - The CGE Telescope (CGE 1400 Shown) ASSE 1 2 3 4 5 6 7 Schmidt Corrector Lens Optical Tube Finderscope Eyepiece Star Diagonal Declination Clutch Lock Latitude Adjustment Scale A B C D CONTROL PANEL Dec Motor Port R.A. Motor Port PC Interface Port Auto Guider Port 8 9 10 11 12 13 14 15 E F G H 5 I Control Panel (see below) Hand Control Holder / Strap Hand Control Tripod Tripod Center Leg Brace Counterweights Counterweight Bar R.A.
This section covers the assembly instructions for your Celestron CGE telescope. The CGE telescope should be set up indoors the first time so that it is easy to identify the various parts and familiarize yourself with the correct assembly procedure before attempting it outdoors. Eyepiece Diagonal Finderscope Power Supply Counterweight CGE 800 (#11058) 25mm Plossl Eyepiece - 1.25" Star Diagonal - 1.25" 6x30 with Bracket Car Battery Adapter One - 11 lb. CGE 925 (#11059) 25mm Plossl Eyepiece - 1.
Electronincs Pier Tripod Leg Hand Control Holder Center Leg Brace Figure 2-2 Attaching the Center Leg Brace For maximum rigidity, the Super HD Tripod has a center leg brace that installs on to the threaded rod below the tripod head. This brace fits snugly against the tripod legs, increasing stability while reducing vibration and flexure. To attach the center leg brace: 1. Unscrew the tension knob from the threaded rod beneath the tripod head. 2.
5. Tighten the screws to hold the column securely in place. Attaching the Equatorial Mount After the tripod is set up, you are ready to attach the equatorial mount. The equatorial mount is the platform to which the telescope attaches and allows you to move the telescope in right ascension and declination. To attach the equatorial mount to the tripod: 1. Insert the base of the equatorial mount into the top of the electronics pier. 2.
5. Tighten the locking screw on the side of the weight to hold the counterweight in place. 6. Replace the counterweight safety thumbscrew and washer. Attaching the Optical Tube to the Mount Important! The telescope attaches to the mount via a dovetail slide bar which is mounted along the bottom of the telescope tube. Before you attach the optical tube, make sure that the declination and right ascension clutch knobs are tight.
Installing the Star Diagonal The star diagonal is a prism that diverts the light at a right angle to the light path of the telescope. This allows you to observe in positions that are physically more comfortable than if you looked straight through. To attach the star diagonal onto a CGE 800, 925 or 1100: 1. Turn the set screw on the visual back until its tip no longer extends into (i.e., obstructs) the inner diameter of the visual back. 2.
focal length (i.e., the smaller the number) the higher the magnification. Generally, you will use low-to-moderate power when viewing. For more information on how to determine power, see the section on “Calculating Magnification.” Installing the Finderscope The CGE telescopes come with a 6x30 or 9x50 finderscope used to help you locate and center objects in the main field of your telescope. To accomplish this, the finder has a built-in cross-hair reticle that shows the optical center of the finderscope.
Moving the Telescope Manually In order to properly balance your telescope, you will need to move your telescope manually at various portions of the sky to observe different objects. To make rough adjustments, loosen the R.A. and DEC clutch knobs slightly and move the telescope in the desired direction. Both the R.A. and DEC axis have two knobs to clutch down each axis of the telescope. To loosen the clutches on the telescope, rotate the clutch knobs counterclockwise.
Balancing The Mount in R.A. To eliminate undue stress on the mount, the telescope should be properly balanced around the polar axis. Proper balancing is crucial for accurate tracking. To balance the mount: 1. Verify that the telescope securing knobs on the telescope mounting platform are tight. 2. Loosen the R.A. clutch knobs and position the telescope off to one side of the mount. The counterweight bar will extend horizontally on the opposite side of the mount. 3.
5. Slightly loosen the knobs that holds the telescope to the mounting platform and slide the telescope either forward or backward until it remains stationary when the DEC clutch is loose. Do NOT let go of the telescope tube while the knob on the mounting platform is loose. 6. Tighten the knobs on the telescope mounting platform to hold the telescope in place.
6. Remove the center leg brace from the tripod. 7. Collapse the tripod legs inward, towards each other. The telescope is now broken down into enough pieces to be easily transported. Note: Before transporting the optical tube it is recommended that the two mirror locking screw located on the rear cell of the tube be locked down. Before tightening the screws, the primary mirror must be moved towards the rear cell of the tube. Rotate the focuser knob clockwise until you feel a slight resistance.
The CGE has a hand controller designed to give you instant access to all the functions the CGE has to offer. With automatic slewing to over 40,000 objects, and common sense menu descriptions, even a beginner can master its variety of features in just a few observing sessions. Below is a brief description of the individual components of the computerized hand controller: 1. 2. 3.
4. Catalog Keys: The CGE has keys on the hand control to allow direct access to each of the catalogs in its database. The CGE contains the following catalogs in its database: Messier – Complete list of all Messier objects. NGC – Complete list of all the deep-sky objects in the Revised New General Catalog. Caldwell – A combination of the best NGC and IC objects. Planets - All 8 planets in our Solar System plus the Moon. Stars – A compiled list of the brightest stars from the SAO catalog.
Alignment Procedures In order for the CGE to accurately point to objects in the sky, it must first be aligned to two known positions (stars) in the sky. With this information, the telescope can create a model of the sky, which it uses to locate any object with known coordinates.
• • (10) to scroll through the choices. Refer to Time Zone map in Appendix for more information. Date - Enter the month, day and year of your observing session. Finally, you must enter the longitude and latitude of the location of your observing site. Use the table in Appendix C to locate the closest longitude and latitude for your current observing location and enter those numbers when asked in the hand control, pressing ENTER after each entry.
Quick-Align Quick-Align uses all the date and time information entered at startup to align the telescope. However, instead of slewing to two alignment stars for centering and alignment, the CGE bypasses this step and simply models the sky based on the information given. This will allow you to roughly slew to the coordinates of bright objects like the moon and planets and gives the CGE the information needed to track objects in altazimuth in any part of the sky.
Object Catalog Selecting an Object Now that the telescope is properly aligned, you can choose an object from any of the catalogs in the CGE's extensive database. The hand control has a key (4) designated for each of the catalogs in its database. There are two ways to select objects from the database: scrolling through the named object lists and entering object numbers. Helpful Hint Pressing the LIST key on the hand control will access all objects in the database that have common names or types.
Tour Mode The CGE includes a tour feature which automatically allows the user to choose from a list of interesting objects based on the date and time in which you are observing. The automatic tour will display only those objects that are within your set filter limits (see Filter Limits in the Setup Procedures section of the manual). To activate the Tour mode, press the TOUR key (6) on the hand control. The CGE will display the best objects to observe that are currently in the sky.
up in the field of view of the eyepiece). However, if any of the slower slew rates (rate 6 and below) are used to center an object in the finderscope, you may need to press the opposite directional button to make the telescope move in the correct direction. 1 2 3 4 5 = = = = = .5x 1x (sidereal) 4x 8x 16x 6 7 8 9 = 64x = .
sidereal time. Local sidereal time (LST) is useful for knowing the right ascension of celestial objects that are located on the meridian at that time. View Time-Site will always display the last saved time and location entered while it is linking with the GPS. Once current information has been received, it will update the displayed information. If GPS is switched off, the hand control will only display the last saved time and location.
Named Object or Messier catalogs, the hand control will let you know that the Ring Nebula (M57) is approximately 6° from your current position. Searching the Double Star catalog will reveal that Epsilon Lyrae is only 1° away from Vega. To use the Identify feature: • • • Press the Menu button and select the Identify option. Use the Up/Down scroll keys to select the catalog that you would like to search. Press ENTER to begin the search.
button, go with the higher value for positive, but use a lower value for negative. CGE will remember these values and use them each time it is turned on until they are changed. Filter Limits – When an alignment is complete, the CGE automatically knows which celestial objects are above the horizon. As a result, when scrolling through the database lists (or selecting the Tour function), the CGE hand control will display only those objects that are known to be above the horizon when you are observing.
• • DEC Switch - This is the declination switch error value set when Utilities / Calibrate Mount / DEC Switch - Cone is carried out. RA Switch - This is the R.A. switch error value set when Utilities / Calibrate Mount / R.A. Switch is carried out. Utility Features Scrolling through the MENU (9) options will also provide access to several advanced utility functions within the CGE such as; Mount Calibration, Periodic Error Correction, Hibernate as well as many others.
1. With the telescope set up and roughly positioned towards Polaris, align the mount using the AutoTwoStar Alignment method. 2. Select Polar Align from the Utilities menu and press Enter. Based on your current alignment, the CGE will slew to where it thinks Polaris should be. Use the equatorial head latitude and azimuth adjustments to place Polaris in the center of the eyepiece. Do not use the direction buttons to position Polaris.
Turn On/Off GPS - If using your CGE telescope with the optional CN-16 GPS accessory (see Optional Accessories section of the manual), you will need to turn the GPS on the first time you use the accessory. Additionally, just like with the real time clock you will need to turn the GPS module off in order to enter dates and location other than the current information downloaded by the GPS.
CGE Ready MENU TRACKING MODE EQ NORTH EQ SOUTH OFF RATE SIDEREAL SOLAR LUNAR VIEW TIME-SITE SCOPE SETUP SETUP TIME-SITE ANTI-BACKLASH FILTER LIMITS DIRECTION BUTTONS GOTO APPROACH AUTOGUIDE RATE MOUNT SETTINGS UTILITIES ALIGNMENT LIST START-UP PROCUDURE SET SWITCH POSITION ENTER TIME DLS/ST TIME ZONE ENTER DATE- MM/DD/YY ENTER LONG/LAT AUTO TWO-STAR ALIGNMENT SELECT STAR 1 CENTER STAR 1 SELECT STAR 2 NAMED STAR NAMED OBJECT ASTERISM TOUR VARIABLE STAR DOUBLE STAR CCD OBJECTS ABELL IC CATALOG CALDWELL ME
A telescope is an instrument that collects and focuses light. The nature of the optical design determines how the light is focused. Some telescopes, known as refractors, use lenses. Other telescopes, known as reflectors, use mirrors. The Schmidt-Cassegrain optical system (or Schmidt-Cass for short) uses a combination of mirrors and lenses and is referred to as a compound or catadioptric telescope.
Focusing The CGE's focusing mechanism controls the primary mirror which is mounted on a ring that slides back and forth on the primary baffle tube. The focusing knob, which moves the primary mirror, is on the rear cell of the telescope just below the star diagonal and eyepiece. Turn the focusing knob until the image is sharp. If the knob will not turn, it has reached the end of its travel on the focusing mechanism. Turn the knob in the opposite direction until the image is sharp.
To convert degrees to feet at 1,000 yards, which is more useful for terrestrial observing, simply multiply by 52.5. Continuing with our example, multiply the angular field .66° by 52.5. This produces a linear field width of 34.7 feet at a distance of one thousand yards. The apparent field of each eyepiece that Celestron manufactures is found in the Celestron Accessory Catalog (#93685).
Up to this point, this manual covered the assembly and basic operation of your CGE telescope. However, to understand your telescope more thoroughly, you need to know a little about the night sky. This section deals with observational astronomy in general and includes information on the night sky and polar alignment. The Celestial Coordinate System To help find objects in the sky, astronomers use a celestial coordinate system that is similar to our geographical coordinate system here on Earth.
Motion of the Stars The daily motion of the Sun across the sky is familiar to even the most casual observer. This daily trek is not the Sun moving as early astronomers thought, but the result of the Earth's rotation. The Earth's rotation also causes the stars to do the same, scribing out a large circle as the Earth completes one rotation. The size of the circular path a star follows depends on where it is in the sky.
Latitude Scales The easiest way to polar align a telescope is with a latitude scale. Unlike other methods that require you to find the celestial pole by identifying certain stars near it, this method works off of a known constant to determine how high the polar axis should be pointed. The Celestron CGE1100 mount can be adjusted from 13 to 65 degrees (see figure 5-3).
2. Loosen the DEC clutch knob and move the telescope so that the tube is parallel to the polar axis. When this is done, the declination setting circle will read +90°. If the declination setting circle is not aligned, move the telescope so that the tube is parallel to the polar axis. 3. Adjust the mount in altitude and/or azimuth until Polaris is in the field of view of the finder. 4. Center Polaris in the field of the telescope using the fine adjustment controls on the mount.
Declination Drift Method of Polar Alignment This method of polar alignment allows you to get the most accurate alignment on the celestial pole and is required if you want to do long exposure deep-sky astrophotography through the telescope. The declination drift method requires that you monitor the drift of selected stars. The drift of each star tells you how far away the polar axis is pointing from the true celestial pole and in what direction.
With your telescope set up, you are ready to use it for observing. This section covers visual observing hints for both solar system and deep sky objects as well as general observing conditions which will affect your ability to observe. Observing the Moon Often, it is tempting to look at the Moon when it is full. At this time, the face we see is fully illuminated and its light can be overpowering. In addition, little or no contrast can be seen during this phase.
Observing the Sun Although overlooked by many amateur astronomers, solar observation is both rewarding and fun. However, because the Sun is so bright, special precautions must be taken when observing our star so as not to damage your eyes or your telescope. Never project an image of the Sun through the telescope. Because of the folded optical design, tremendous heat buildup will result inside the optical tube. This can damage the telescope and/or any accessories attached to the telescope.
Seeing Seeing conditions refers to the stability of the atmosphere and directly affects the amount of fine detail seen in extended objects. The air in our atmosphere acts as a lens which bends and distorts incoming light rays. The amount of bending depends on air density. Varying temperature layers have different densities and, therefore, bend light differently. Light rays from the same object arrive slightly displaced creating an imperfect or smeared image.
After looking at the night sky for a while you may want to try photographing it. Several forms of celestial photography are possible with your telescope, including short exposure prime focus, eyepiece projection, long exposure deep sky, terrestrial and even CCD imaging. Each of these is discussed in moderate detail with enough information to get you started. Topics include the accessories required and some simple techniques.
• • • • T-Max 400 Any 100 to 400 ISO color slide film Fuji Super HG 400 Ektar 25 or 100 2. Center the Moon in the field of your CGE telescope. 3. Focus the telescope by turning the focus knob until the image is sharp. 4. Set the shutter speed to the appropriate setting (see table below). 5. Trip the shutter using a cable release. 6. Advance the film and repeat the process.
act as a shutter. The card prevents light from entering the telescope while the shutter is released. Once the shutter has been released and the vibration has diminished (a few seconds), move the black card out of the way to expose the film. After the exposure is complete, place the card over the front of the telescope and close the shutter. Advance the film and you're ready for your next shot. Keep in mind that the card should be held a few inches in front of the telescope, and not touching it.
There are several techniques for this type of photography, and the one chosen will determine the standard accessories needed. The best method for long exposure deep sky astrophotography is with an off-axis guider. This device allows you to photograph and guide through the telescope simultaneously. Celestron offers a very special and advanced offaxis guider, called the Radial Guider (#94176). In addition, you will need a T-Ring to attach your camera to the Radial Guider.
Using Periodic Error Correction Once the telescope has been properly polar aligned, select PEC from the Utilities menu and press ENTER to begin recording your periodic error. Here’s how to use the PEC function. 1. Find a bright star relatively close to the object you want to photograph. 2. Insert a high power eyepiece with illuminated cross hairs into your telescope. Orient the guiding eyepiece cross hairs so that one is parallel to the declination while the other is parallel to the R.A. axis. 3.
• • • • • • Konica 3200 (color print) Fujichrome 1600D (color slide) 3M 1000 (color slide) Scotchchrome 400 T-Max 3200 (black and white print) T-Max 400 (black and white print) As you perfect your technique, try specialized films, that is films that are designed or specially treated for celestial photography.
Secondary Mirror Secondary Mirror Retaining Ring Corrector Plate Secondary Mirror Mount Handle Figure 7-2 - The Fastar Compatible Optical System compatible CGE telescope's versatility allows it to be used in many different f-number configurations for CCD imaging. It can be used at f/2 (with optional Fastar Lens Assembly), f/6.3 (with the optional Reducer/Corrector), f/10, and f/20 (with the optional 2x Barlow) making it the most versatile imaging system available today.
Fastar L ens Assem bl CCD Camera Figure 7-3 Figure 7-4 The key factors for good CCD imaging are; exposure time, field-of-view, image size, and pixel resolution. As the F/# goes down (or gets faster), the exposure times needed decreases, the field-of-view-increases, but the image scale of the object gets smaller. What is the difference between f/2 and f/10? F/2 has 1/5 the focal length of f/10.
with a 30 second exposure and can be improved upon dramatically if several 30-60 second exposures are added together . F/6.3 with Reducer/Corrector When imaging some objects like planetary nebula (for example M57, the Ring Nebula) and small galaxies (M104, the Sombrero Galaxy), larger image scale is needed to resolve finer detail. These objects are better shot at f/6.3 or even f/10. Medium size to small galaxies – f/6.
Auto Guiding The CGE telescope has a designated auto guiding port for use with a CCD autoguider. The diagram below may be useful when connecting the CCD camera cable to the CGE and calibrating the autoguider. Note that the four outputs are active-low, with internal pull-ups and are capable of sinking 25 mA DC.
While your CGE telescope requires little maintenance, there are a few things to remember that will ensure your telescope performs at its best. Care and Cleaning of the Optics Occasionally, dust and/or moisture may build up on the corrector plate of your telescope. Special care should be taken when cleaning any instrument so as not to damage the optics. If dust has built up on the corrector plate, remove it with a brush (made of camel’s hair) or a can of pressurized air.
Figure 8-2 -- Even though the star pattern appears the same on both sides of focus, they are asymmetric. The dark obstruction is skewed off to the left side of the diffraction pattern indicating poor collimation. To accomplish this, you need to tighten the secondary collimation screw(s) that move the star across the field toward the direction of the skewed light. These screws are located in the secondary mirror holder (see figure 8-1).
You will find that additional accessories enhance your viewing pleasure and expand the usefulness of your telescope. For ease of reference, all the accessories are listed in alphabetical order. Adapter AC (#18773) - Allow DC (battery powered) telescopes to be converted for use with 120 volt AC power. Barlow Lens - A Barlow lens is a negative lens that increases the focal length of a telescope. Used with any eyepiece, it doubles the magnification of that eyepiece.
Fastar Lens Assembly – (#94180 – 8", #94179 – 11", #94181 - 14 ) - For the ultimate in deep-sky imaging, a Fastar Lens Assembly can be combined with any of Celestron's Fastar compatible telescope to achieve amazing f/2 widefield images. Celestron offers the lens assembly complete with lens assembly, secondary holder and counterweight. Filters, Eyepiece - To enhance your visual observations of solar system objects, Celestron offers a wide range of colored filters that thread into the 1-1/4" oculars.
Radial Guider (#94176) - The Celestron Radial Guider® is specifically designed for use in prime focus, deep sky astrophotography and takes the place of the T-Adapter. This device allows you to photograph and guide simultaneously through the optical tube assembly of your telescope. This type of guiding produces the best results since what you see through the guiding eyepiece is exactly reproduced on the processed film.
CGE 925 CGE 800 Computerized Equatorial Mount No 25mm Plossl - 1.25" (94x) 1.25" Adjustable, Carbon Steel 6x30 Computerized Equatorial Mount Carbon Fiber Yes 25mm Ploss l- 1.25" (81x) 1.25" Adjustable, Carbon Steel Included Finderscope Mount Optical Tube Fastar Compatible Eyepiece Star Diagonal Tripod Car Battery Adapter 14 .68 arc seconds Limiting Stellar Magnitude Resolution: Rayleigh 28 ft. Starbright Coating 3.35" 13% .62º 32 ft. Starbright Coating 2.
600mA 850mA (with 1A spikes) Yes 600mA 850mA (with 1A spikes) Yes CN-16 GPS Accessory Slew one axis Slew both axes Internal clock GPS Compatible 58 CN-16 GPS Accessory 215mA 12 VDC 1.5A 40,000+ objects, 400 user defined programmable objects.Enhanced information on over 200 objects 40,000+ objects, 400 user defined programmable objects.Enhanced information on over 200 objects 12 VDC 1.5A 24bit, 0.08 arcsec calculation 24bit, 0.
APPENDIX A LONGITUDES AND LATITUDES LONGITUDE degrees min ALABAMA Anniston Auburn Birmingham Centreville Dothan Fort Rucker Gadsden Huntsville Maxwell AFB Mobile Mobile Aeros Montgomery Muscle Shoal Selma Troy Tuscaloosa ALASKA Anchorage Barrow Fairbanks Haines Hrbor Homer Juneau Ketchikan Kodiak Nome Sitka Sitkinak Skagway Valdez ARIZONA Davis-M AFB Deer Valley Douglas Falcon Fld Flagstaff Fort Huachuc Gila Bend Goodyear GrandCanyon Kingman Luke Page Payson Phoenix Prescott Safford Awrs Scottsdale Show Low
Melbourne Miami Naples Nasa Shuttle Orlando Panama City Patrick AFB Pensacola Ruskin Saint Peters Sanford Sarasota Tallahassee Tampa Intl Titusville Tyndall AFB Vero Beach West Palm Beach Whiting Fld GEORGIA Albany Alma Athens Atlanta Augusta/Bush Brunswick Columbus Dobbins AFB Fort Benning Ft Stewart Hunter Aaf La Grange Macon/Lewis Moody AFB Robins AFB Rome/Russell Valdosta Waycross HAWAII Barbers Pt Barking San Fr Frigate Hilo Honolulu Int Kahului Maui Kaneohe Mca Kilauea Pt Lanai-Lanai Lihue-Kauai Maui
Wurtsmith Ypsilanti MINNESOTA Albert Lea Alexandria Bemidji Muni Brainerd-Crw Detroit Laks Duluth Ely Fairmont Fergus Falls Grand Rapids Hibbing Intl Falls Litchfield Mankato Marshall Arpt Minneapolis Park Rapids Pequot Lake Rochester Saint Paul St Cloud Thief River Tofte Warroad Worthington MISSISSIPPI Columbus AFB Golden Trian Greenville Greenwood Gulfport Hattiesburg Jackson Keesler AFB Laurel Mccomb Meridian NAS Meridian/Key Natchez Oxford Tupelo MISSOURI Columbia Cape Girardeau Ft Leonard Jefferson Cit
LONGITUDE degrees OKLAHOMA Altus AFB 99 Ardmore 97 Bartlesville 96 Clinton 99 Enid 97 Fort Sill 98 Gage 99 Hobart 99 Lawton 98 Mcalester 95 Norman 97 Oklahoma 97 Page 94 Ponca City 97 Stillwater 97 Tinker AFB 97 Tulsa 95 Vance AFB 97 OREGON Astoria 123 Aurora 122 Baker 117 Brookings 124 Burns Arpt 118 Cape Blanco 124 Cascade 121 Corvallis 123 Eugene 123 Hillsboro 122 Klamath Fall 121 La Grande 118 Lake View 120 Meacham 118 Medford 122 Newport 124 North Bend 124 Ontario 117 Pendleton 118 Portland 122 Redmond
LONGITUDE LATITUDE degrees min degrees Walla Walla 118 16.8 46 Wenatchee 120 1.2 47 Whidbey Is 122 39 48 Yakima 120 31.8 46 WEST VIRGINIA Beckley 81 7.2 37 Bluefield 81 13.2 37 Charleston 81 3.6 38 Clarksburg 80 13.8 39 Elkins 79 51 38 Huntington 82 33 38 Lewisburg 80 2.4 37 Martinsburg 77 58.8 39 Morgantown 79 55.2 39 Parkersburg 81 25.8 39 Wheeling 80 39 40 Wh Sulphur 80 1.2 37 LONGITUDE degrees min min 6 24 21 34.
Appendix B - RS-232 Connection You can control your CGE 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 CGE can be controlled using popular astronomy software programs. Communication Protocol: CGE-i communicates at 9600 bits/sec, No parity and a stop bit. All angles are communicated with 16 bit angle and communicated using ASCII hexadecimal.
Additional RS232 Commands Send Any Track Rate Through RS232 To The Hand Control 1. 2. 3. 4. Multiply the desired tracking rate (arcseconds/second) by 4. Example: if the desired trackrate is 150 arcseconds/second, then TRACKRATE = 600 Separate TRACKRATE into two bytes, such that (TRACKRATE = TrackRateHigh*256 + rackRateLow). Example: TrackRateHigh = 2 TrackRateLow = 88 To send a tracking rate, send the following 8 bytes: a. Positive Azm tracking: 80, 3, 16, 6, TrackRateHigh, TrackRateLow, 0, 0 b.
APPENDIX C – MAPS OF TIME ZONES 66
CELESTRON TWO YEAR WARRANTY A. Celestron warrants this telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase satisfactory to Celestron. B.
Celestron 2835 Columbia Street Torrance, CA 90503 Tel. (310) 328-9560 Fax. (310) 212-5835 Web site at http//www.celestron.com Copyright 2003 Celestron All rights reserved. (Products or instructions may change without notice or obligation.) Item # 11063-INST $10.