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Meade LX200GPS Manual

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Meade LX200GPSJMI Telescopes Motofocus for Meade LX200GPS MFLXGPS
Motofocus for Meade LX200GPS Telescope Focusers Focusing is made easy with the JMI Motofocus MFLXGPS for the Meade LX200GPS telescopes. This Motofocus requires no drilling or tapping for mounting. It is a user friendly hand control with an electric focus motor that attaches to the shaft of a focuser knob (or the knob itself). It is battery operated and comes with the 9-volt battery. The Motofocus offers precise vibration-free focusing without the need to touch the telescope. This unit features v... Read more

Brand: JMI Telescopes
Part Number: MFLXGPS
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Comments to date: 3. Page 1 of 1. Average Rating:
harlequin516 10:01am on Thursday, October 7th, 2010 
Nico from palo alto, California I got this for my 10th birthday, its awesome. Has great optics StreetPilot 7500 This is a great GPS navigator system. Especially when it come to navigate without the satellite, it is great. However.
Roland Cheppe 12:08am on Friday, September 10th, 2010 
good product - better price adorama camera had fantastic price on this product and more than a few others I noticed while browsing.
ami81 4:07pm on Sunday, June 13th, 2010 
I first got RollerCoaster tycoon 1 around seven years ago with my first computer. When I first played on it I loved it.

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F Want to learn how to

attach the microfocuser assembly to the rear cell port of your LX200GPS telescope? See HOW TO ASSEMBLE YOUR TELESCOPE, pages 13 and 14.

G Want to learn more

about focusing your telescope? See pages 17 and 31.

H I J 1)

Want to learn how to install the batteries? See page 13.
Want to learn more about the primary mirror lock? See MIRROR MIRROR, page 38.
Want to learn more about the Right Ascension and Declination setting circles? See page 50.
Right Ascension (R.A.) Setting Circle: See APPENDIX A, page 50, for detailed information. Right Ascension (R.A.) Lock: Controls the manual horizontal rotation of the telescope. Turning the R.A. lock counterclockwise unlocks the telescope, enabling it to be freely rotated by hand about the horizontal axis. Turning the R.A. lock clockwise locks the telescope, prevents the telescope from being rotated manually, and engages the horizontal motor drive for Autostar II operation. Computer Control Panel (see Fig. 1 inset): A. ON/OFF Switch: Turns the computer control panel and Autostar II ON or OFF. The red power indicator LED next to the switch illuminates when power is supplied to the Autostar II handbox, the microfocuser, and to the telescopes motor drives (the LED can be turned off in the Panel Light menu; see page 27).
Definitions Throughout this manual, you will notice the terms "Alt/Az," "Right Ascension," and "Declination." Alt/Az or more properly, altazimuth, is frequently used to refer to altitude or Declination (the up-and-down vertical movement of the telescope) and azimuth or Right Ascension (the side-to-side horizontal movement of the telescope). Right Ascension is abbreviated as "R.A." and Declination as "Dec."
Important Note: After the telescope is aligned (see page 18), the Dec. slow motion control 1^ may be used and the telescope will remain in alignment. However, if the R.A. slow motion control 1) is used after the telescope has been aligned, alignment will be lost and the telescope will need to be realigned.

1$ 1% 1^ 1&

B. 12vDC Power Connector: Provides a connection so that the telescope assembly may be powered from a standard 115v AC home outlet using the optional #547 Power Adapter with Cable or the optional 12v DC #607 Cigarette Lighter Adapter. See OPTIONAL ACCESSORIES, page 43. C. Focus Port: Plug the microfocuser into this port. Control the microfocuser through the Autostar II menus. See HOT BUTTON MENUS, page 31, and 2$ below. D. Reticle Port: Plug the optional reticle eyepiece into this port. Control the reticle through the Autostar II menus. See HOT BUTTON MENUS page 31. Also see OPTIONAL ACCESSORIES, page 42. Note: See the instruction sheets that are included with the focuser, the reticle, and the autoguider for more details. E. 12vDC Output: Use the 12vDC output to power telescope accessories and the Maksutov fan on the 7" LX200GPS model. F. Handbox (HBX) Port: Plug the Autostar II coil cord into this port. G. RS232 Ports (2): Provides connection with a PC and for current and future Meade accessories. Your PC can control your LX200GPS telescope using serial commands. Go to the Meade website ( to download the latest serial commands and device pinouts. H. Autoguider Port: Plug the optional autoguider into this port. See the instruction sheet that came with your autoguider for more information. Tiltable Autostar II Holder: Attach to fork handles (see 1% below). Holds your handbox in a convenient location. Fork Handles: Use to lift optical tube assembly or to rotate the telescope when attached to the tripod. Declination (Dec.) Slow-Motion Control: Make fine adjustments in Declination (altitude) by turning this control with the Dec. Lock (see 1& below) in the locked position. In order for this control to operate properly, power must be off. Dec. Lock: Controls the manual vertical movement of the telescope. Turning the Dec. lock counterclockwise unlocks the telescope enabling it to be freely rotated by hand about the vertical axis. Turning the Dec. lock clockwise (to a firm feel only) prevents the telescope from being moved manually, but engages the vertical motor drive for Autostar II operation. Dust Cover: Gently pry the dust cover from the front lens of the telescope. Note: The dust cover should be replaced after each observing session and the power turned off to the telescope. Verify that any dew that might have collected during the observing session has evaporated prior to replacing the dust cover.

Caution: When loosening the Dec. lock, be sure to support the optical tube (19, Fig. 1). The weight of the tube could cause the tube to swing through the fork arms suddenly.

1( 2) 2! 2@ 2# 2$

Optical Tube: The main optical component that gathers the light from distant objects and brings this light to a focus for examination through the eyepiece. Declination (Dec.) Setting Circle (on left fork arm): See APPENDIX A, page 50, for detailed information. Viewfinder Collimation Screws: Use these six screws to adjust the alignment of the viewfinder. 8 x 50mm Viewfinder: A low-power, wide-field sighting scope with crosshairs that enables easy centering of objects in the telescope eyepiece. GPS Receiver (see page 21 for photo): Receives information transmitted from Global Positioning System satellites. See pages 18, 19, and 21 for more information. 4-Speed Zero Image-Shift Microfocuser: Allows precise image focus during visual, CCD, and astrophotographic applications. Maintains precise image centering on even the smallest CCD chips. Operates at four speeds: Fine to fast using the Arrow keys of the Autostar II hand controller. Plug microfocuser into the Focus port (13C, Fig. 1). Tube Adapters: The optical and mechanical axes of the LX200GPS telescope have been carefully aligned at the factory to ensure accurate object pointing. Do not loosen or remove the optical tube assembly from the tube adapters. The resulting misalignment of the axes will result in inaccurate slewing of the telescope in the GO TO mode.
2! Want to learn more about
attaching and aligning the viewfinder? See page 15.

2$ Want to learn more

about the Zero Image Shift Microfocuser? See pages 13, 14, and 31.


Fig. 2: The Autostar II Handbox.
Tour the Cosmos with Just the Push of a Button
Control of the LX200GPS telescope models is through the operation of the standard Autostar II system. Nearly all functions of the telescope are accomplished with just a few pushes of Autostar IIs buttons.
Want to learn more about downloading the latest updates of Autostar II software from the Meade website? See page 31.
Because the Autostar II system uses flash (rewritable) memory, your system will be able to grow when new features and enhancements become available. Download the latest satellite data, star and object catalogs, tours, serial commands list, and software revisions, directly from the Meade website ( (Requires the optional LX200 Interface Cable. See OPTIONAL ACCESSORIES, page 43.) Some of the major features of the Autostar II system are: s Automatically move the telescope to any of the more than 145,000 objects stored in the object library, including: Library # of Objects New General Catalog (NGC): 7,840 Index Catalog (IC): 5,386 Messier Catalog (M): 110 Caldwell Catalog: 109 Named Objects: 227 Herschel Catalog: 400 Abell Catalog of Galaxy Clusters: 2,712 Arp Catalog of Irregular Galaxies: 645 Uppsala Galaxy Catalog: 12,940 Morphological Catalog of Galaxies: 12,939 General Catalog of Variable Stars: 28,484 SAO: 17,191 Hipparcos Star Catalog: 17,325

Note: 14" LX200GPS model users, see page 66 for information on battery installation.
Fig. 5: Battery installation.
Note: The microfocuser is shipped with the microfocuser adapter (B) threaded to the SC accessory adapter (L). Unthread the adapters from each other before attaching the microfocuser.
Tip: Although you can set up the telescope to face any direction to perform Automatic Alignment, you will achieve optimal performance when the computer control panel faces South.
Fig. 6: Microfocuser and eyepiece assembly. (A) Rear cell of telescope (shown separate from the telescope assembly for the sake of clarity, see 5, Fig. 1); (B) Microfocuser adapter; (C) Microfocuser; (D) 1.25" accessory adapter. SC accessory adapter (L) may be used in this position instead if Schmidt-Cassegrain accessories are being used. Do not use either adapter if using a 2" diagonal diagonal mirror; (E) Eyepiece holder thumbscrew; (F) Eyepiece; (G) 1.25 "Diagonal Prism. 2" diagonal mirror may also be used in this position (12" models); (H) Adapter Thumbscrew; (I) Microfocuser Thumbscrews; (J) Microfocuser bearings; (K) Hex screws; (L) Microfocuser SC Accessory Adapter (see margin note).
Attach microfocuser: Remove the dust cap from the rear cell port (5, Fig. 1) of the telescope. Thread the microfocuser adapter (B, Fig. 6) onto the rear cell port thread. Slide the microfocuser (C, Fig. 6) over the microfocuser adapter and tighten the three hex screws (K, Fig. 6) using the provided hex key.
Attach Diagonal (or accessories) 1.25" Diagonal Prism Users: If using the 1.25" diagonal prism (G, Fig. 6), slide the 1.25" adapter (D, Fig. 6) into the microfocuser. Line up the thumbscrew into the groove in the microfocuser (Fig. 7a and 7b). Tighten the microfocuser thumbscrews (I, Fig. 6) to a firm feel only. Slide the 1.25" diagonal prism into the adapter (D, Fig. 6). Tighten the accessory adapter thumbscrew (H, Fig. 6) to a firm feel only. SC Optional Accessory Users: If using any of the optional accessories (such as the Off-Axis Guider, T-Adapter, etc.; see page 42) with the LX200GPS SC models, slide the supplied SC accessory adapter (L, Fig. 6) into the microfocuser. Line up the groove on the side of the adapter with either of the microfocuser thumbscrews (Fig. 8a and 8b) and tighten that thumbscrew to a firm feel only. Slide the optional accessory into the accessory adapter. Tighten the other microfocuser thumbscrew to a firm feel only. 2.0" Diagonal Mirror Users: If using the 2.0" diagonal mirror, slide the mirror directly into the microfocuser. The adapters (H and L, Fig. 6) are not required. Tighten the thumbscrews (I, Fig. 6) to a firm feel only. Plug in the microfocuser: Plug the microfocuser into the Focus port (13C, Fig. 1). Note: If you wish to mount a camera directly to the microfocuser, you need to attach an optional T-Adapter to the microfocuser. See OPTIONAL ACCESSORIES, page 42. Important Note: The microfocuser is carefully adjusted at the factory. If it become necessary to adjust the microfocuser, it must be performed by factory trained technicians. If the microfocuser is improperly adjusted, performance will degrade and damage will result. Damage due to improper adjustments not authorized by the factory will not be covered under warranty.

Select Item: Event

Sunrise Sun Transit Sunset Moonrise Moon Transit Moonset Moon Phases Next Full Moon Next New Moon Next 1st Qtr Next 3rd Qtr Meteor Showers Quadrantids Lyrids Etc. Solar Eclipses Lunar Eclipses Min. of Algol Autumn Equinox Vernal Equinox Winter Solstice Summer Solstice

Select Item: Guided Tour

Tour Objects Tonight's Best How Far is Far Etc.
A. Accretion Disk Etc. B. C. Etc.

Select Item: Utilities

Timer Set Start & Stop Alarm Set On & Off Eyepiece Calc. Field of View Magnification Suggest Sun Warning Brightness Adj. Contrast Adj. Panel Light Aux Port Power Beep Temperature Battery Alarm Landmark Survey Sleep Scope Park Scope

Select Item: Setup

Align Automatic Easy One Star Two Star Align on Home Date Time Daylight Saving Smart Mount Configuration Off On Train Update Load Save As Delete Erase Telescope Mount Model Focal Length Max Slew Rate Mount Upper Limit Mount Lower Limit Park Position Calibrate Home Anti-Backlash Train Drive Calibrate Sensors Tracking Rate Guiding Rate Reverse L/R Reverse Up/Dn Home Sensors GPS Alignment R.A. PEC Dec. PEC High Precision Targets Astronomical Terrestrial Site Select Add Delete Edit Owner Info Clone Download Statistics Reset
Moon Overview Landing Sites Apollo 11 Etc. Craters Abbot Etc. Mountains Mons Bradley Etc. Mare, Lakes Lacus Aestatis Etc. Valley, Rills Rima Agatharchid Etc.
Figure 18: The Complete Autostar II Menu Tree Structure.

Object Menu

Almost all observing with Autostar II is performed using the Object menu category. (Note: Exceptions include Guided Tour and Landmark Survey.) See GO TO SATURN, page 20, for an example of observing using the Object menu. Also see USING THE GUIDED TOUR, page 20. Autostar II contains many libraries of viewable objects, such as stars, planets, comets, nebulae and so forth. When one of these objects is selected from a library, Autostar II moves your telescope (if properly aligned) and points it at the selected object. Six of the most popular libraries can be accessed directly using the hot buttons. The Object Menu options include: Solar System: A library of the eight planets (Earth is not included) in order out from the Sun, followed by the Moon, asteroids, and comets. Constellation: A library of all 88 Northern and Southern Hemisphere constellations. When this menu option is chosen and a constellation name appears on the first line of the screen, press GO TO once to change the second line to the name of the brightest star in the constellation. Press GO TO a second time to slew the telescope to that star. Use the Scroll keys to cycle through the list of stars in the constellation, from brightest to dimmest. Deep Sky: A library of objects outside our Solar System such as nebulae, star clusters, galaxies, and quasars. Star: A catalog of stars listed in different categories such as named, double, variable, or nearby. Also included are the Hipparcos, SAO, HD, and HR catalogs. The Star catalog may also be accessed directly by pressing the Number key "6."

Want to learn more about Observing Satellites? See page 34.
Satellite: A library of Earth-orbiting objects such as the International Space Station, the Hubble Space Telescope, Global Positioning System (GPS) satellites, and geosynchronous orbit satellites. Other Catalogs are accessed directly using the Autostar II "hot keys": Caldwell (key "2"), Messier catalog ("3"), Solar System ("5"), IC ("8"), and NGC ("9"). To slew the telescope to catalog objects: Enter the catalog number of the object using the Number keys and then press ENTER. For example: To slew to NGC 6720, press Number Key "9," then using the Number keys, enter the digits "6-7-2-0." Then press ENTER. Autostar II displays the common name and alternate names of the object, if available. Press one of the Scroll keys to display some or all of the following information about that object: Type of object (galaxy, nebula, etc.), Dec. and R.A. coordinates, constellation it is located within, magnitude, size, distance, and star-type classification, if the object is a star. If further information is available, it displays as scrolling text. Press GO TO. The telescope, if aligned (see AUTOMATIC ALIGNMENT, page 18), will slew to that chosen object. Press MODE repeatedly to return to previous menu levels. User Objects: Allows the user to define and store in memory deep-sky objects of specific interest that are not currently in the Autostar II libraries. See CREATING USER OBJECTS, page 33, for more information.
Want to learn more about Landmarks? See page 34.
Landmarks: Stores the location of terrestrial points of interest in the permanent Autostar II database. This function works with a telescope that remains in one fixed spot or can be setup in the exact same spot each time it is used.
Select: To select a Landmark already in the database (see ADD below), choose the "Select" option and scroll through the list. Press ENTER to select a Landmark, then press GO TO and the telescope slews to the object. Add: To add a Landmark, choose the "Add" option. Enter a name for the Landmark. Locate and center the Landmark in the eyepiece, then press ENTER. Important Note: To add objects to the Landmark database, the telescope must be located and aligned exactly as when the original objects were added to the database.

Reverse L/R: Reverses the functions of the Left and Right Arrow keys for controlling the telescope's motion (i.e., the Right key moves the telescope to the left). Reverse U/D: Reverses the functions of the Up and Down Arrow keys for controlling the telescope's motion (i.e., the Up key moves the telescope down). Home Sensors: Turns off or on the True North and True Level sensors, if preferred, for Easy, One-Star, and Two-Star alignment. User must then manually level the telescope and point the telescope to True North during alignment. Default setting is "On." GPS Alignment: Allows three options. Select "Off" if you wish to align the telescope manually (turns off GPS). Select "On" (default setting) if you wish to automatically align your telescope and want the telescope to get the GPS fix when it is needed during alignment. Select "At Start Up" if you want the telescope to get a GPS fix when the telescope is powered ip. Dec. PEC: Allows you to perform periodic error correction on the Dec. drive worm gear. Must be performed with a high-power reticle (eg., 9mm). R.A. PEC: Allows you to perform periodic error correction on the R.A. drive worm gear. Must be performed with a high-power reticle (eg., 9mm). High Precision: If High Precision is turned on, when looking for a faint celestial object (e.g., a nebula or galaxy), Autostar II first slews to a nearby bright star and displays "ENTER to Sync." Center the star in the eyepiece, then press ENTER. At that point the telescope has a high precision alignment to that part of the sky and it then slews to the object that was originally requested.
Do you want to learn how to perform the periodic error correction procedure? See PERIODIC ERROR CORRECTION, page 39.
Tip: If the "ENTER to Sync" feature is accessed by mistake (holding the ENTER key for more than 2 seconds), press MODE to return to the previous screen.
Targets: Switches between Astronomical targets and Terrestrial targets. If "Astronomical" is selected, the telescope tracking motor is activated and any object you observe will remain centered in the eyepiece. If "Terrestrial" is selected, the tracking motor is turned off. See TO TRACK AN OBJECT AUTOMATICALLY, page 18. Site provides access to several options including: s Select: Displays the currently selected observing site. Use the Scroll keys to cycle through all available sites (see ADD below). Press ENTER when the site you wish to select displays. Use this option when you move to a different geographic location.

Dec. Setting Circle

Level Base
Fig. 19: Alt/Az Home Position.
4. Star Alignment. Autostar II chooses two stars to align upon. The telescope slews to the first star for alignment. Should the alignment star not appear in the field of view in the eyepiece, it should be easily recognized: It will be the brightest star in the area of the sky where the telescope is pointing. Use the Arrow keys to move the telescope until the star is visible and centered in the eyepiece. Press ENTER. Repeat the procedure for the second alignment star. Note: See WHICH ONE'S THE ALIGNMENT STAR, page 19, for some important tips concerning alignments stars and using your viewfinder.
Fig. 20: Dec. Setting Circle at 0.
When the procedure is performed correctly, "Alignment Successful" displays. If Autostar II does not display this message, perform this procedure again. (Keep pressing MODE until "Align: Easy" displays and repeat the procedure.)
Two-Star Alt/Az Alignment
Two-Star Alignment requires some knowledge of the night sky. Autostar II provides a library of bright stars and two stars from this library are chosen by the observer for alignment. In this procedure, Autostar II does not automatically find home, level, or North. 1. Alignment Option Screen. "Align: Automatic" displays. 2. Select Alignment. Press the Scroll keys until "Align: Two Star" displays. Press ENTER.
Set Home Position. Place the telescope in the home position. To Set the Home Position Manually: a. See Figs. 19 and 20, page 37. Loosen the telescopes Dec. lock (17, Fig. 1). Set the optical tube to 0 on the Dec. setting circle (Fig. 20). b. Tighten the Dec. lock (17, Fig. 1) to a firm feel only. c. Level the tripod base. d. Move the base of the telescope so that the computer control panel (13, Fig. 1) approximately faces South. e. Unlock the R.A. lock (12, Fig. 1) and turn the telescope's optical tube horizontally until it points North. See Fig. 37, page 52, for more information. f. Re-lock the R.A. lock (12, Fig. 1). Press ENTER. g. Press ENTER.
Note: Autostar II locates alignment stars based on the date, time, and location entered. The alignment stars may change from night to night. All that is required is for the observer to center the selected stars in the eyepiece when prompted.
4. Star Alignment. "Select Star" displays. Autostar II then displays a library of stars for the observer to choose from. Use the Scroll keys to scroll to a star on the list that you wish to align upon. Select a star that you can easily locate in the night sky. Press ENTER. 5. Center Star. The telescope slews to the star. Use the Arrow keys to move the telescope until the star is centered in the eyepiece. Press ENTER. Center Star. Repeat procedure for the second alignment star. The telescope is aligned and you are now ready to use Autostar II's GO TO capabilities for a night of observing.

Do not, for any reason, remove the correcting plate from its machined housing for cleaning or other purposes. You will almost certainly not be able to replace the corrector in its proper rotational orientation and serious degradation of optical performance will result. Meade Instruments assumes no liability for damage incurred to the telescope in this way. If the LX200GPS is used outdoors on a humid night, water condensation on the telescope surfaces will probably result. While such condensation does not normally cause any damage to the telescope, it is recommended that the entire telescope be wiped down with a dry cloth before the telescope is packed away. Do not, however, wipe any of the optical surfaces. Rather, simply allow the telescope to sit for some time in the warm indoor air, so that the wet optical surfaces can dry unattended. If your LX200GPS is not to be used for an extended period, perhaps for one month or more, it is advisable to remove the batteries from the telescope. Batteries left in the telescope for prolonged periods may leak, causing damage to the telescopes electronic circuitry. Do not leave your LX200GPS inside a sealed car on a warm summer day; excessive ambient temperatures can damage the telescopes internal lubrication and electronic circuitry. The microfocuser is carefully adjusted at the factory. If it becomes necessary to adjust the microfocuser ball bearings (see Fig. 30), it must be performed by factory trained technicians. If the microfocuser is improperly adjusted, performance will degrade and damage will result. Damage due to improper adjustments not authorized by the factory will not be covered under warranty.
Fig. 30: Microfocuser ball bearings.


The optical collimation (alignment) of any astronomical telescope used for serious purposes is important, but in the case of the Schmidt-Cassegrain design of the 8", 10", and 12" LX200GPS models, such collimation is absolutely essential for good performance. (Note: The 7" model, a Maksutov-Cassegrain, does not need to be collimated.) Take special care to read and understand this section well so that your LX200GPS will give you the best optical performance. As part of final optical testing, every Meade Schmidt-Cassegrain is precisely collimated at the Meade factory before shipment. However, vibrations in shipping can cause the optical system to become misaligned. Re-aligning the optics is, however, a straightforward process. To check the collimation of your LX200GPS, center a bright star that is overhead, or use a hot spot of reflected Sunlight from a chrome car bumper, with the supplied 26mm eyepiece. Allow the telescope to adjust to the temperature of your observation site before proceeding; temperature differences between the optics and the outside air can cause distortion in the images.

Using setting circles requires a developed technique. When using the circles for the first time, try hopping from one bright star (the calibration star) to another bright star of known coordinates. Practice moving the telescope from one easy-to-find object to another. In this way, the precision required for accurate object location becomes evident. Note You may also enter an object's R.A. and Dec. coordinates using the "User: Objects" option of Autostar II's Object menu. Autostar II then automatically slews the telescope to the entered coordinates. Note that the R.A. circle is double-indexed (i.e., there are two series of numbers running in opposite directions around the circumference of the R.A. circle). The upper series of numbers (increasing counterclockwise) applies to observers located in the Earths Northern Hemisphere; the lower series of numbers (increasing clockwise) applies to observers located in the Earths Southern Hemisphere. To use the setting circles to locate an object not easily found by direct visual observation:
Fig. 35: Declination Setting Circle.
With the telescope aligned to the Celestial Pole, first look up the celestial coordinates (R.A. and Dec.) of the object in a star atlas. Then loosen the R.A. lock and move the telescope to read the correct R.A. of the desired object; lock the R.A. lock onto the coordinate. Next, move the telescope in Declination to read the correct Declination of the object. If the procedure has been followed carefully, and if the telescope was wellaligned with the pole, the desired object should now be in the telescopic field of a lowpower eyepiece. If you do not immediately see the object you are seeking, try searching the adjacent sky area. Keep in mind that, with the 26mm eyepiece, the field of view of the LX200GPS is about 0.5. Because of its much wider field, the viewfinder may be of significant assistance in locating and centering objects, after the setting circles have been used to locate the approximate position of the object.
Fig. 36: Section of Right Ascension Setting Circle.
Pinpoint application of the setting circles requires that the telescope be precisely aligned with the pole. See PRECISE POLAR ALIGNMENTS, page 53.

Equatorial Wedge

An optional equatorial wedge is required for equatorial (polar) alignment. Note: The Meade Superwedge is available for models using the giant tripod. Contact the factory for more information. Caution (14" model users only): An adapter plate is required to mount the Superwedge with 14" models. It is recommended that you only mount the Superwedge using the adapter plate; failure to use the adapter plate may result in damage to the telescope or injury to the user. Contact the factory for more information. The equatorial wedge permits use in an astronomical, or equatorial, mode. The wedge fits onto the field tripod. Equatorial alignment allows you to take longer exposure photographs with your LX200GPS. See the instruction sheet supplied with the wedge for installation and setup information. Note: For almost all astronomical observing requirements, approximate settings of the telescopes latitude and polar axis are acceptable. Do not allow undue attention to precise polar alignment of the telescope to interfere with your basic enjoyment of the instrument. Note: The Meade equatorial wedge is designed solely for use in conjunction with your Meade tripod. The wedge should never be used without the tripod (e.g., by placing the wedge alone on a table top and then mounting the telescope on the wedgethe wedge may become seriously unbalanced, to the point where the telescope may actually tip over. Included features: s Attachment of the wedge to the tripod by means of only one manual knob. s Quick azimuth adjustment by loosening the manual knob. s Bubble level for rapid tripod/wedge leveling. s Etched latitude scale for fast adjustment of the latitude angle.

Fig. 40: LX200GPS mounted on an equatorial wedge.
The above procedure results in very accurate polar alignment, and minimizes the need for tracking corrections during astrophotography.
Autostar II Polar Alignment
Autostar II provides three different (manual) methods for polar alignment: Easy, OneStar and Two-Star.
Important Note: In order to select any of Autostar II's three polar alignment options, you must first select "Polar" in the "Mount" option of the "Setup: Telescope" menu.

Easy Polar Alignment

Two alignment stars are chosen by Autostar II based on the date, time, and location. First, choose "Polar" from the "Setup: Telescope: Mount" menu. The rest of the procedure is identical to the (Alt/Az) EASY (TWO-STAR) ALIGN, page 37.

One-Star Polar Alignment

Polar One-Star Alignment requires some knowledge of the night sky. Autostar II provides a library of bright stars and one star from this library is chosen by the observer for alignment. Polaris is chosen by Autostar II. First, choose "Polar" from the "Setup: Telescope: Mount" menu. The rest of the procedure is almost identical to the (Alt/Az) ONE STAR ALT/AZ ALIGNMENT, page 38, except that Autostar II prompts you to point the telescope at Polaris and center it in the telescope eyepiece.

Two-Star Polar Alignment

Polar Two-Star Alignment requires some knowledge of the night sky. Autostar II provides a library of bright stars and two stars from this library are chosen by the observer for alignment. First, choose "Polar" from the "Setup: Telescope: Mount" menu. The rest of the procedure is almost identical to the (Alt/Az) TWO STAR ALT/AZ ALIGNMENT, page 37.
LX200GPS TIPS Surf the Web
One of the most exciting resources for astronomy is the internet. The internet is full of websites with new images, discoveries, and the latest astronomical information. For example: When comet Hale-Bopp made its approach to our Sun in 1998, astronomers around the world posted new photos daily. On the internet, you can find websites for almost any topic relating to astronomy. Try the following key word searches: NASA, Hubble, HST, astronomy, Messier, satellite, nebula, black hole, variable stars, etc. Check Meades website for the latest product and technical information. You can download the latest software revisions, links to other astronomical sites, coordinates of celestial objects and the latest satellite tracking information for your Autostar II handset. See page 31 for more information. Youll find our website at: Here are some other sites you might find interesting: Sky & Telescope: Astronomy: The Starfield: Astronomy Picture of the Day: http://antwrp.gsfc.nasa.goc/apod Heavens Above (satellite observing information): Photographic Atlas of the Moon: Hubble Space Telescope Public Pictures

Fig. 45: The Super Giant Field Tripod collapsed.
Fig. 46: Tighten the tripod spreader bar with the tension knob.
Fig. 47: Remove the pointed bolts from the drive base.
To collapse the tripod (after removing the telescope) for storage, follow these steps: a. Loosen the tension knob and rotate the spreader bar 60 from its assembled position, so that one spreader bar arm is located between each adjacent pair of tripod legs. b. Move the spreader bar to the top of the threaded rod. Tighten the tension knob, locking the bar. c. Working one leg at a time, gradually collapse the legs of the field tripod until the tension hub is positioned onto the threaded rod. Use the second tension knob to secure the tension hub in place. Attaching the 16 Drive Base a. Remove the three pointed bolts that hold the packing material in place. These bolts are used only for shipping purposes and not used in the telescope assembly procedure. See Fig. 47. b. Rotate the field tripod so that one leg is pointing approximately South (it need not point exactly South). c. Position the 16 drive base onto the field tripod, with the power panel facing South. Secure the drive base using the three 1/2-13x1-1/2 long bolts. Thread these bolts up through the underside of the tripod head into the drive base using the supplied hex key. Firmly tighten these bolts. See Fig. 48. c. Level the drive base by loosening the six lock-knobs (5, Fig. 44) and sliding out the inner tripod legs. d. Note the DB-15 connector at the center of the base. Attaching the Fork a. Place the single-piece fork onto the top of the drive base. One side of the base of the fork has a cutout to allow clearance for the R.A. lock (12, Fig. 1) and R.A. slowmotion control (10, Fig. 1), which are located on top of the drive base. b. Bolt the fork to the drive base using the four 3/8-16x3/4 long bolts (Fig. 49). Using the supplied hex key, tighten to a firm feel only. c. Unscrew and remove the four thumbscrews from the rectangular plate (Fig. 50) in the center of the fork base. Remove the plate. Note the DB-15 plug under the fork base. d. Connect the DB-15 plug to the DB-15 connector underneath the plate. Tighten the two thumbscrews onto the connector to a firm feel. See Fig. 51. e. A fifth 3/8-16x3/4 long bolt is supplied with the telescope. Just using your fingers, loosely tighten this bolt under the plate. See Fig. 51. This bolt acts as a safety feature to prevent the DB-15 connector and cable from being damaged when you disassemble the telescope. You will not be able to disassemble the telescope until the bolt is removed. The bolt is located near the DB-15 assembly in the base as a reminder to unplug the connector before removing the fork from the drive base. Mounting the Optical Tube Assembly (OTA) This step requires two people who can lift up to 70 pounds each (Note: See Caution on page 62). The optical tube assembly (OTA) weighs about 125 lbs. and it must be positioned accurately in order to mount to the fork.

If you find that you cannot see a star because there is an obstruction blocking your view: Press MODE briefly to skip this star. Another star will be chosen.
To exit the training sequence before it is completed: Press and hold MODE for about two seconds and then release it.
When you have completed training: Save your model, using a good, descriptive name, using the Save As menu. Upon completion of the training, Smart Mount is enabled and remains on until you choose Off from the Smart Mount Configuration menu.
Permanently Mounted Scopes For permanently mounted telescopes, it is not necessary to have more than one model unless the weight and balance of auxiliary equipment introduces balance or flexure changes that significantly affect pointing. The best practice is to train the Smart Mount and then run a couple of sessions with Update enabled. Thereafter, simply leave Smart Mount On as the installation default. Other Menus Options Save As and Load The Smart Mount system allows you to save several models you have created (see TRAINING on the previous page) using the Save As command. Choose which model will be the "Current Model using the Load command. Update The Update mode allows you to update training for the current model you have enabled. You will sync on several stars as previously described, which will further refine the pointing of your telescope. Save your model after running in update mode, otherwise the update will be lost when the telescope is powered off. On Load a model from memory (see SAVE AS AND LOAD above) and then Select Smart On. When Smart Mount is "On," the telescope will use the currently loaded model to refine you telescope's pointing, but will not update the model (see SMART MOUNT UPDATE above). If Smart Mount was "On" when you last powered off your telescope, it will be "On" when you start the next session. Off When Smart Mount is "Off," the telescope will not use any model you have created to refine pointing accuracy. Erase The Erase command clears the Current Smart Mount table values to allow a new model to be created. Delete The Delete command allows you to delete any model from memory. To delete a model, just scroll through the names and select the model to you wish to delete and press ENTER. You will be asked to confirm your choice. Press ENTER again and it will be removed from memory.


In the early 17th century Italian Scientist Galileo, using a telescope smaller than your LX200GPS, turned it skyward instead of looking at the distant trees and mountains. What he saw, and what he realized about what he saw, has forever changed the way mankind thinks about the universe. Imagine what it must have been like being the first human to see moons revolve around the planet Jupiter or to see the changing phases of Venus! Because of his observations, Galileo correctly realized Earth's movement and position around the Sun, and in doing so, gave birth to modern astronomy. Yet Galileo's telescope was so crude, he could not clearly make out the rings of Saturn. Galileo's discoveries laid the foundation for understanding the motion and nature of the planets, stars, and galaxies. Building on his foundation, Henrietta Leavitt determined how to measure the distance to stars, Edwin Hubble gave us a glimpse into the possible origin of the universe, Albert Einstein unraveled the crucial relationship of time and light, and 21st-century astronomers are currently discovering planets around stars outside our solar system. Almost daily, using sophisticated successors to Galileo's telescope, such as the Hubble Space Telescope and the Chandra X-Ray Telescope, more and more mysteries of the universe are being probed and understood. We are living in the golden age of astronomy. Unlike other sciences, astronomy welcomes contributions from amateurs. Much of the knowledge we have on subjects such as comets, meteor showers, double and variable stars, the Moon, and our solar system comes from observations made by amateur astronomers. So as you look through your Meade LX200GPS telescope, keep in mind Galileo. To him, a telescope was not merely a machine made of glass and metal, but something far morea window of incredible discovery. Autostar II Glossary Be sure to make use of Autostar IIs Glossary feature. The Glossary menu provides an alphabetical listing of definitions and descriptions of common astronomical terms. Access directly through the Glossary menu or through hypertext words embedded in Autostar II. See GLOSSARY MENU, page 27, for more information. Objects in Space Listed below are some of the many astronomical objects that can be seen with your LX200GPS: The Moon The Moon is, on average, a distance of 239,000 miles (380,000km) from Earth and is best observed during its crescent or half phase when Sunlight strikes the Moons surface at an angle. It casts shadows and adds a sense of depth to the view (Fig. 61). No shadows are seen during a full Moon, causing the overly bright Moon to appear flat and rather uninteresting through the telescope. Be sure to use a neutral Moon filter when observing the Moon. Not only does it protect your eyes from the bright glare of the Moon, but it also helps enhance contrast, providing a more dramatic image. Using your LX200GPS, brilliant detail can be observed on the Moon, including hundreds of lunar craters and maria, described below. Craters are round meteor impact sites covering most of the Moons surface. With no atmosphere on the Moon, no weather conditions exist, so the only erosive force is meteor strikes. Under these conditions, lunar craters can last for millions of years. Maria (plural for mare) are smooth, dark areas scattered across the lunar surface. These dark areas are large ancient impact basins that were filled with lava from the interior of the Moon by the depth and force of a meteor or comet impact. Twelve Apollo astronauts left their bootprints on the Moon in the late 1960's and early 1970's. However, no telescope on Earth is able to see these footprints or any other artifacts. In fact, the smallest lunar features that may be seen with the largest telescope on Earth are about one-half mile across.

Fig. 61: The Moon. Note the deep shadows in the craters.
Fig. 62: The planet Jupiter. Jupiter's four largest moons can be observed in a different position every night.
Fig. 63: Saturn has the most extensive ring structure in our Solar System.
Tip: Enter a date in the Date menu and you can determine if a planet(s) will be visible during the night of the entered date by checking its rise and set times.
Planets Planets change positions in the sky as they orbit around the Sun. To locate the planets on a given day or month, consult a monthly astronomy magazine, such as Sky and Telescope or Astronomy. You can also consult Autostar II for information about planets. Scroll to the "Object: Solar System" menu and scroll through the lists of planets. When a planet you are interested in displays, press ENTER. Use the Scroll keys to display information about the planet, such as the planet's coordinates, and the rise and set times. Listed below are the best planets for viewing through the LX200GPS. Venus is about nine-tenths the diameter of Earth. As Venus orbits the Sun, observers can see it go through phases (crescent, half, and full) much like those of the Moon. The disk of Venus appears white as Sunlight is reflected off the thick cloud cover that completely obscures any surface detail. Mars is about half the diameter of Earth, and appears through the telescope as a tiny reddish-orange disk. It may be possible to see a hint of white at one of the planets polar ice caps. Approximately every two years, when Mars is closest to Earth in its orbit, additional detail and coloring on the planet's surface may be visible. Jupiter is the largest planet in our solar system and is 11 times the diameter of Earth. Jupiter (Fig. 62) appears as a disk with dark lines stretching across the surface. These lines are cloud bands in the atmosphere. Four of Jupiters moons (Io, Europa, Ganymede, and Callisto) can be seen as star-like points of light when using even the lowest magnification. These moons orbit Jupiter so that the number of moons visible on any given night changes as they circle around the giant planet. Saturn is nine times the diameter of Earth and appears as a small, round disk with rings extending out from either side (Fig. 63). In 1610, Galileo, the first person to observe Saturn through a telescope, did not understand that what he was seeing were rings. Instead, he believed that Saturn had ears. Saturns rings are composed of billions of ice particles ranging in size from a speck of dust to the size of a house. The major division in Saturn's rings, called the Cassini Division, is occasionally visible through the LX200GPS. Titan, the largest of Saturns moons can also be seen as a bright, star-like object near the planet. Deep-Sky Objects Star charts can be used to locate constellations, individual stars and deep-sky objects. Examples of just some of the deep-sky objects you'll be able to observe with your LX200GPS are given below:


Meade Telescope Serial Command Protocol
Revision L 9 October 2002 Introduction This paper documents the Meade Telescope Serial Control Protocol utilized to remotely command and control Meade Telescopes. This command language contains a core of common commands supported by all telescope. Due to different implementation and technological advances the command has extension that are not supported by all model. The differences are noted in the descriptive text for the commands. Finally, there are a series of new commands proposed for the LX200GPS. These commands are indicated in the Appendix A at the end of this document. As an extension to the Telescope Protocol beginning with the LX200GPS, a possible response to any command is ASCII NAK (0x15). Should the telescope control chain be busy and unable to accept an process the command, a NAK will be sent within 10 msec of the receipt of the # terminating the command. In this event, the controller should wait a reasonable interval and retry the command. Telescope Command Groupings: ------------------ Supported -----------Command Group Command Designator Symbol AutoStar LX200<16" LX 16" Alignment Query <ACK> x x x Alignment* A x x x Active Backlash $B Reticule Control* B x p p Sync Control C p p p Distance Bars D x x x Fan* f p Focus Control Commands F p p p GPS Commands g Get Information G x x x Home Position Commands* h x x Hour H x x x Initialize Telescope I Library L p p p Movement M x p x High Precision P x x x Smart Drive Control* $Q x x x Quit Command Q x x x Field De-rotator r p Rate Control R p p p Set Information S x x x Tracking Frequency T p p p User Format Control U p x x Way point (Site) W x x x Help Commands ? x x Notes: Commands accepted by the telescopes are shown in the table above indicated by an x entry. This means that the telescope will accept these commands and respond with a syntactically valid response where required. A "p" indicated only a subset of this command class is supported. Due to the differing implementations of the telescopes, some of the commands may provide static responses or may do nothing in response to the command. See the detailed description of the commands below to determine the exact behavior. ACK - Alignment Query ACK <0x06> Query of alignment mounting mode. Returns: A If scope in AltAz Mode L If scope in Land Mode P If scope in Polar Mode LX200GPS x x x x x x x x x x x x x x x x x x x x x x x x -
Meade Telescope Protocol A - Alignment Commands :Aa# Start Telescope Automatic Alignment Sequence [LX200GPS only] Returns: 1: When complete (can take several minutes). 0: If scope not AzEl Mounted or align fails :AL# :AP# :AA# Sets telescope to Land alignment mode Returns: nothing Sets telescope to Polar alignment mode Returns: nothing Sets telescope the AltAz alignment mode Returns: nothing
$B Active Backlash Compensation :$BAdd# Set Altitude/Dec Antibacklash Returns Nothing :$BZdd# Set Azimuth/RA Antibacklash Returns Nothing B - Reticule/Accessory Control :B+# Increase reticule Brightness Return: Nothing :B-# Decrease Reticule Brightness Return: Nothing
:B<n># Set Reticle flash rate to <n> (an ASCII expressed number) <n> Values of 0.3 for LX200 series <n> Values of 0.9 for Autostar and LX200GPS Return: Nothing :BDn# Set Reticule Duty flash duty cycle to <n> (an ASCII expressed digit) [LX200 GPS Only] <n> Values: 0 = On, 1.15 flash rate Return: Nothing
C - Sync Control :CL# Synchonize the telescope with the current Selenographic coordinates. :CM# Synchronizes the telescope's position with the currently selected database object's coordinates. Returns: LX200's - a "#" terminated string with the name of the object that was synced. Autostars & LX200GPS - At static string: " M31 EX GAL MAG 3.5 SZ178.0'#"
D - Distnace Bars :D# Requests a string of bars indicating the distance to the current library object. Returns: LX200's a string of bar characters indicating the distance. Autostars and LX200GPS a string containing one bar until a slew is complete, then a null string is returned.
Meade Telescope Protocol f - Fan Command :f+# LX 16 Turn on the tube exhaust fan LX200GPS Turn on power to accessor panel Autostar & LX200 < 16 Not Supported Returns: nothing :f-# LX 16 Turn off tube exhaust fan LX200GPS - Turn off power to accessory panel Autostar & LX200 < 16 Not Supported Returns: Nothing LX200GPS Return Optical Tube Assembly Temperature Returns <sdd.ddd># - a # terminated signed ASCII real number indicating the Celsius ambient temperature. All others Not supported

F Focuser Control :F+# Start Focuser moving inward (toward objective) Returns: None :F-# :FQ# :FF# :FS# Start Focuser moving outward (away from objective) Returns: None Halt Focuser Motion Returns: Notrhing Set Focus speed to fastest setting Returns: Nothing Set Focus speed to slowest setting Returns: Nothing
:F<n># Autostar & LX200GPS set focuser speed to <n> where <n> is an ASCII digit 1.4 Returns: Nothing LX200 Not Supported g GPS/Magnetometer commands :g+# LX200GPS Only - Turn on GPS Returns: Nothing :g-# :gps# :gT# LX200GPS Only - Turn off GPS LX200GPS Only Turns on NMEA GPS data stream. Returns: The next string from the GPS in standard NEMA format followed by a # key Powers up the GPS and updates the system time from the GPS stream. The process my take several minutes to complete. During GPS update, normal handbox operations are interrupted. [LX200gps only] Returns: 0 In the event that the user interrupts the process, or the GPS times out. Returns: 1 After successful updates
G Get Telescope Information :G0# Get Alignment Menu Entry 0 Returns: A # Terminated ASCII string. [LX200 legacy command] :G1# Get Alignment Menu Entry 0 Returns: A # Terminated ASCII string. [LX200 legacy command]
Meade Telescope Protocol :G2# :GA# Get Alignment Menu Entry 0 Returns: A # Terminated ASCII string. [LX200 legacy command] Get Telescope Altitude Returns: sDD*MM# or sDD*MMSS# The current scope altitude. The returned format depending on the current precision setting. Get Local Telescope Time In 12 Hour Format Returns: HH:MM:SS# The time in 12 format Get Browse Brighter Magnitude Limit Returns: sMM.M# The magnitude of the faintest object to be returned from the telescope FIND/BROWSE command. Command when searching for objects in the Deep Sky database. Get current date. Returns: MM/DD/YY# The current local calendar date for the telescope. Get Calendar Format Returns: 12# or 24# Depending on the current telescope format setting. Get Telescope Declination. Returns: sDD*MM# or sDD*MMSS# Depending upon the current precision setting for the telescope. Get Currently Selected Object/Target Declination Returns: sDD*MM# or sDD*MMSS# Depending upon the current precision setting for the telescope. Get Find Field Diameter Returns: NNN# An ASCIi interger expressing the diameter of the field search used in the IDENTIFY/FIND commands. Get Browse Faint Magnitude Limit Returns: sMM.M# The magnitude or the birghtest object to be returned from the telescope FIND/BROWSE command. Get UTC offset time Returns: sHH# or sHH.H# The number of decimal hours to add to local time to convert it to UTC. If the number is a whole number the sHH# form is returned, otherwise the longer form is return. On Autostar and LX200GPS, the daylight savings setting in effect is factored into returned value. Get Current Site Longitude Returns: sDDD*MM# The current site Longitude. East Longitudes are expressed as negative Get High Limit Returns: sDD* The minimum elevation of an object above the horizon to which the telescope will slew with reporting a Below Horizon error. Get Local Time in 24 hour format Returns: HH:MM:SS#

Meade Telescope Protocol The Local Time in 24-hour Format :Gl# Get Larger Size Limit Returns: NNN# The size of the smallest object to be returned by a search of the telescope using the BROWSE/FIND commands. Get Site 1 Name Returns: <string># A # terminated string with the name of the requested site. Get Site 2 Name Returns: <string># A # terminated string with the name of the requested site. Get Site 3 Name Returns: <string># A # terminated string with the name of the requested site. Get Site 4 Name Returns: <string># A # terminated string with the name of the requested site. Get Lower Limit Returns: DD*# The highest elevation above the horizon that the telescope will be allowed to slew to without a warning message. Get Minimum Quality For Find Operation Returns: SU# Super EX# Excellent VG# Very Good GD# Good FR# Fair PR# Poor VP# Very Poor The mimum quality of object returned by the FIND command. Get Telescope RA Returns: HH:MM.T# or HH:MM:SS# Depending which precision is set for the telescope Get current/target object RA Returns: HH:MM.T# or HH:MM:SS Depending upon which precision is set for the telescope Get the Sidereal Time Returns: HH:MM:SS# The Sidereal Time as an ASCII Sexidecimal value in 24 hour format Get Smaller Size Limit Returns: NNN'# The size of the largest object returned by the FIND command expressed in arcminutes. Get tracking rate Returns: TT.T# Current Track Frequency expressed in hertz assuming a synchonous motor design where a 60.0 Hz motor clock would produce 1 revolution of the telescope in 24 hours.
Meade Telescope Protocol :Gt# Get Current Site Latitdue Returns: sDD*MM# The latitude of the current site. Positive inplies North latitude.
:GVD# Get Telescope Firmware Date Returns: mmm dd yyyy# :GVN# Get Telescope Firmware Number Returns: dd.d# :GVP# Get Telescope Product Name Returns: <string># :GVT# Get Telescope Firmware Time returns: HH:MM:SS# :Gy# Get deepsky object search string Returns: GPDCO# A string indicaing the class of objects that should be returned by the FIND/BROWSE command. If the character is upper case, the object class is return. If the character is lowercase, objects of this class are ignored. The character meanings are as follws: G Galaxies P Planetary Nebulas D Diffuse Nebulas C Globular Clusters O Open Clusters Get telescope azimuth Returns: DDD*MM#T or DDD*MMSS# The current telescope Azimuth depending on the selected precision.
h Home Position Commands :hS# LX200GPS and LX 16 Seeks Home Position and stores the encoder values from the aligned telescope at the home position in the nonvolatile memory of the scope. Returns: Nothing Autostar,LX200 Ignored :hF# LX200GPS and LX 16 Seeks the Home Position of the scope and sets/aligns the scope based on the encoder values stored in non-volatile memory Returns: Nothing Autostar,LX200 - Igrnored LX200GPS only: Sleep Telescope. Power off motors, encoders, displays and lights. Scope remains in minimum power mode until a keystroke is received or a wake command is sent. Autostar, LX200GPS and LX 16Slew to Park Position Returns: Nothing LX200 GPS Only: Wake up sleeping telescope. Autostar, LX200GPS and LX 16 Query Home Status Returns: 0 Home Search Failed 1 Home Search Found 2 Home Search in Progress

:hN# :hP# :hW# :h?#

Meade Telescope Protocol LX200 Not Supported H Time Format Command :H# Toggle Between 24 and 12 hour time format Returns: Nothing I Initialize Telescope Command :I# LX200 GPS Only - Causes the telescope to cease current operations and restart at its power on initialization. L Object Library Commands :LB# Find previous object and set it as the current target object. Returns: Nothing LX200GPS & Autostar Performs no function :LCNNNN# Set current target object to deep sky catalog object number NNNN Returns : Nothing LX200GPS & Autostar Implemented in later firmware revisions :LF# Find Object using the current Size, Type, Upper limit, lower limt and Quality contraints and set it as current target object. Returns: Nothing LX200GPS & Autostar Performs no function Identify object in current field. Returns: <string># Where the string contains the number of objects in field & object in center field. LX200GPS & Autostar Performs no function. Returns static string 0 - Objects found. Get Object Information Returns: <string># Returns a string containing the current target objects name and object type. LX200GPS & Autostar performs no operation. Returns static description of Andromeda Galaxy.
:LMNNNN# Set current target object to Messier Object NNNN, an ASCII expressed decimal number. Returns: Nothing. LX200GPS and Autostar Implemented in later versions. :LN# :LoD# Find next deep sky target object subject to the current constraints. LX200GPS & AutoStar Performs no function Select deep sky Library where D specifices 0 - Objects CNGC / NGC in Autostar & LX200GPS 1 - Objects IC 2 UGC 3 Caldwell (Autostar & LX200GPS) 4 Arp (LX200 GPS) 5 Abell (LX200 GPS) Returns: 1 Catalog available 0 Catalog Not found LX200GPS & AutoStar Performs no function always returns 1 Select star catalog D, an ASCII integer where D specifies: 0 STAR library (Not supported on Autostar I & II) 1 SAO library 2 GCVS library
Meade Telescope Protocol 5 Returns: Catalog Available Catalog Not Found Hipparcos (Autostar I & 2) HR (Autostar I & 2) HD (Autostar I & 2)
:LSNNNN# Select star NNNN as the current target object from the currently selected catalog Returns: Nothing LX200GPS & AutoStar Available in later firmwares M Telescope Movement Commands :MA# Autostar, LX 16, LX200GPS Slew to target Alt and Az Returns: 0 - No fault 1 Fault LX200 Not supported :Me# :Mn# :Ms# :Mw# :MS# Move Telescope East at current slew rate Returns: Nothing Move Telescope North at current slew rate Returns: Nothing Move Telescope South at current slew rate Returns: Nothing Move Telescope West at current slew rate Returns: Nothing Slew to Target Object Returns: 0 1<string># 2<string>#

Slew is Possible Object Below Horizon w/string message Object Below Higher w/string message
P - High Precision Toggle :P# Toggles High Precsion Pointing. When High precision pointing is enabled scope will first allow the operator to center a nearby bright star before moving to the actual taget. Returns: <string> HIGH PRECISION Current setting after this command. LOW PRECISION Current setting after this command. $Q Smart Drive Control $Q# Toggles Smart Drive PEC on and off for both axis Returns: Nothing Not supported on Autostar :$QA+ Enable Dec/Alt PEC [LX200gps only] Returns: Nothing :$QA:$QZ+ Enable Dec/Alt PEC [LX200gps only] Returns: Nothing Enable RA/AZ PEC compensation [LX200gps only]
Meade Telescope Protocol Returns: Nothing :$QZDisable RA/AZ PEC Compensation [LX200gpgs only] Return: Nothing
Q Movement Commands :Q# Halt all current slewing Returns:Nothing :Qe# :Qn# :Qs# :Qw# Halt eastward Slews Returns: Nothing Halt northward Slews Returns: Nothing Halt southward Slews Returns: Nothing Halt westward Slews Returns: Nothing
r Field Derotator Commands :r+# Turn on Field Derotator [LX 16 and LX200GPS] Returns: Nothing :r-# Turn off Field Derotator, halt slew in progress. [Lx 16 and LX200GPS] Returns Nothing
R Slew Rate Commands :RC# Set Slew rate to Centering rate (2nd slowest) Returns: Nothing :RG# :RM# :RS# Set Slew rate to Guiding Rate (slowest) Returns: Nothing Set Slew rate to Find Rate (2nd Fastest) Returns: Nothing Set Slew rate to max (fastest) Returns: Nothing
:RADD.D# Set RA/Azimuth Slew rate to DD.D degrees per second [LX200GPS Only] Returns: Nothing :REDD.D# Set Dec/Elevation Slew rate to DD.D degrees per second [ LX200GPS only] Returns: Nothing :RgSS.S# Set guide rate to +/- SS.S to arc seconds per second. This rate is added to or subtracted from the current tracking Rates when the CCD guider or handbox guider buttons are pressed when the guide rate is selected. Rate shall not exceed sidereal speed (approx 15.0417/sec)[ LX200GPS only] Returns: Nothing
Meade Telescope Protocol S Telescope Set Commands :SasDD*MM# Set target object altitude to sDD*MM# or sDD*MMSS# [LX 16, Autostar, LX200GPS] Returns: 0 Object within slew range 1 Object out of slew range :SbsMM.M# Set Brighter limit to the ASCII decimal magnitude string. SMM.M Returns: 0 - Valid 1 invalid number :SBn# Set Baud Rate n, where n is an ASCII digit (1.9) with the following interpertation 1 56.7K 2 38.4K 3 28.8K 4 19.2K 5 14.4K Returns: 1 At the current baud rate and then changes to the new rate for further communication

:SCMM/DD/YY# Change Handbox Date to MM/DD/YY Returns: <D><string> D = 0 if the date is invalid. The string is the null string. D = 1 for valid dates and the string is Updating Planetary Data# Note: For LX200GPS this is the UTC data! :SdsDD*MM# Set target object declination to sDD*MM or sDD*MM:SS depending on the current precision setting Returns: 1 - Dec Accepted 0 Dec invalid :SEsDD*MM# Sets target object to the specificed selenographic latitude on the Moon. Returns 1- If moon is up and coordinates are accepted. 0 If the coordinates are invalid :SesDDD*MM# Sets the target object to the specified selenogrphic longitude on the Moon Returns 1 If the Moon is up and coordinates are accepted. 0 If the coordinates are invalid for any reason. :SfsMM.M# Set faint magnitude limit to sMM.M Returns: 0 Invalid 1 - Valid :SFNNN# Set FIELD/IDENTIFY field diamter to NNNN arc minutes.

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Meade Telescope Protocol Returns: 0 Invalid 1 - Valid :SgDDD*MM# Set current sites longitude to DDD*MM an ASCII position string Returns: 0 Invalid 1 - Valid :SGsHH.H# Set the number of hours added to local time to yield UTC Returns: 0 Invalid 1 - Valid :ShDD# Set the minimum object elevation limit to DD# Returns: 0 Invalid 1 - Valid :SlNNN# Set the size of the smallest object returned by FIND/BROWSE to NNNN arc minutes Returns: 0 Invalid 1 - Valid :SLHH:MM:SS# Set the local Time Returns: 0 Invalid 1 - Valid :SM<string># Set site 1s name to be <string>. LX200s only accept 3 character strings. Other scopes accept up to 15 characters. Returns: 0 Invalid 1 - Valid :SN<string># Set site 2s name to be <string>. LX200s only accept 3 character strings. Other scopes accept up to 15 characters. Returns: 0 Invalid 1 - Valid :SO<string># Set site 3s name to be <string>. LX200s only accept 3 character strings. Other scopes accept up to 15 characters. Returns: 0 Invalid 1 - Valid :SP<string># Set site 4s name to be <string>. LX200s only accept 3 character strings. Other scopes accept up to 15 characters. Returns: 0 Invalid 1 - Valid

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Meade Telescope Protocol :SoDD*# Set highest elevation to which the telescope will slew Returns: 0 Invalid 1 - Valid :Sq# Step the quality of limit used in FIND/BROWSE through its cycle of VP SU. Current setting can be queried with :Gq# Returns: Nothing :SrHH:MM.T# :SrHH:MM:SS# Set target object RA to HH:MM.T or HH:MM:SS depending on the current precision setting. Returns: 0 Invalid 1 - Valid :SsNNN# Set the size of the largest object the FIND/BROWSE command will return to NNNN arc minutes Returns: 0 Invalid 1 - Valid :SSHH:MM:SS# Sets the local sideral time to HH:MM:SS Returns: 0 Invalid 1 - Valid :StsDD*MM# Sets the current site latitdue to sDD*MM# Returns: 0 Invalid 1 - Valid :STTT.T# Sets the current tracking rate to TTT.T hertz, assuming a model where a 60.0 Hertz synchronous motor will cause the RA axis to make exactly one revolution in 24 hours. Returns: 0 Invalid 1 - Valid :SwN# Set maximum slew rate to N degrees per second. N is the range (2.8) Returns: 0 Invalid 1 - Valid :SyGPDCO# Sets the object selection string used by the FIND/BROWSE command. Returns: 0 Invalid 1 - Valid :SzDDD*MM# Sets the target Object Azimuth [LX 16 and LX200GPS only] Returns:

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Meade Telescope Protocol 0 Invalid 1 - Valid T Tracking Commands :T+# Increment Manual rate by 0.1 Hz Returns: Nothing :T-# :TL# :TM# :TQ# Decrement Manual rate by 0.1 Hz Returns: Nothing Set Lunar Tracking Rage Returns: Nothing Select custom tracking rate Returns: Nothing Select default tracking rate Returns: Nothing
:TDDD.DDD# Set Manual rate do the ASCII expressed decimal DDD.DD Returns: 1 U - Precision Toggle :U# Toggle between low/hi precision positions Low - RA displays and messages HH:MM.T sDD*MM High - Dec/Az/El displays and messages HH:MM:SS sDD*MM:SS Returns Nothing W Site Select :W<n># Set current site to <n>, an ASCII digit in the range 0.3 Returns: Nothing ? Help Text Retrieval :??# Set help text cursor to the start of the first line. Returns: <string># The <string> contains first string of the general handbox help file. :?+# Retrieve the next line of help text Returns: <string># The <string> contains the next string of general handbox help file Retreive previos line of the handbox help text file. Returns: <string># The <string> contains the next string of general handbox help file

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Meade Telescope Protocol Appendix A: LX200GPS Command Extensions :Aa# Automatically align scope :$BAdd# Set Altitude/Dec Antibacklash :$BZdd# Set Azimuth/RA Antibacklash :BD<n># Programmable Reticule Duty Cycle :F<n># Set Focuer Speed :g+# Turn on GPS power :g-# Turn off GPS power :gps# Stream GPS data :gT# Updates Time of Day from GPS :I# Initialize Telescope :$QZ+# RA PEC Enable :$QZ-# RA PEC Disable :$QA+# Dec PEC Enable :$QA-# Dec PEC Disable :RADD.D# Programmable Slew Rates :REDD.D# Programmable Slew Rates :RgSS.S# Programmable Guiding Rates :SBn# Set Baud Rate

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Technical specifications

Full description

Motofocus for Meade LX200GPS Telescope Focusers Focusing is made easy with the JMI Motofocus MFLXGPS for the Meade LX200GPS telescopes. This Motofocus requires no drilling or tapping for mounting. It is a user friendly hand control with an electric focus motor that attaches to the shaft of a focuser knob (or the knob itself). It is battery operated and comes with the 9-volt battery. The Motofocus offers precise vibration-free focusing without the need to touch the telescope. This unit features variable speed for course and fine adjustments. Optional Digital Read Out (DRO) or Digital Focus Counter (DFC) can be added to improve focusing accuracy and repeatability.



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