Meade LXD75 User Manual

Instruction Manual

LXD 75-Series Telescopes

™

WARNING!

Never use a Meade Telescope to look at the Sun! Looking at or

near the Sun will cause instant and irreversible damage to your eye. Eye damage is often painless, so there is no warning to the observer that damage has occurred until it is too late. Do not point the telescope or its viewfinder at or near the Sun. Do not look through the telescope or its viewfinder as it is moving.

Children should always have adult

supervision while observing.

CAUTION: Use care to install batteries in the orientation indicated by the illustration in the battery slots of the battery holder. Follow battery manufacturer's precautions. Do not install batteries backwards or mix new and used batteries. Do not mix battery types. If these precautions are not followed, batteries may explode, catch fire, or leak. Improperly installed batteries void your Meade warranty.

® The name "Meade," "Autostar" and the Meade logo are trademarks registered with the U.S. Patent Office and in principal countries throughout the world. "LXD75," "Autostar Suite," and “LPI” are trademarks of Meade Instruments Corporation.

Patents: US 6,304,376 US 6,392,799 US 6,563,636 D 422,610 Patent Pending

LXD75™-Series

CONTENTS

Telescope Features ...................................................... 4

Autostar Features .......................................................... 9

Getting Started ..............................................................11

Unpacking and Assembly..........................................11

How to Assemble Your Telescope ............................11

Balancing the Telescope ..........................................13

Aligning the Viewfinder..............................................14

Choosing an Eyepiece..............................................14

Observing By Moving the Telescope Manually ........15

Activate the Arrow Keys............................................16

Slew Speeds ............................................................16

Observe the Moon ....................................................17

Tracking Objects ......................................................17

Setting the Polar Home Position ........................17

Observe a Star Using Automatic Tracking ..........18

Using Autostar's GO TO Capabilities ..................18

Moving Through Autostar’s Menus......................19

Initializing Autostar ..............................................19

Training the Drive ................................................20

Easy Alignment ........................................................21

Go To Saturn ............................................................21

Using the Guided Tour ..............................................22

Basic Autostar Operation................................................23

Autostar Navigation Exercise....................................23

Entering Data into Autostar ......................................24

Navigating Autostar ..................................................24

Autostar's Menus............................................................25

Object Menu..............................................................26

Event Menu ..............................................................27

Glossary Menu..........................................................27

Utilities Menu ............................................................27

Setup Menu ..............................................................28

Useful Autostar Features ................................................32

Adding Observing Sites ............................................32

Using Autostar to Find Objects Not in the Libraries....33

Observing Satellites ..................................................34

Landmarks ................................................................34

To Check on Available Memory ................................35

Photography ..................................................................36

Optional Accessories......................................................37

Maintenance and Collimation ........................................40

Specifications ................................................................46

Appendix A: Celestial Coordinates ................................50

Locating the Celestial Pole..................................51

One- And Two-Star Polar Alignment....................51

Appendix B: Enhancing Pointing Precision ....................52

The Polar Alignment Viewfinder ..........................52

Three-Star Alignment Method #1 ........................52

Axis Alignment Method #2 ..................................53

Axis Alignment Method #3 ..................................55

Smart Drive Training (PEC) Method #4 ..............56

Appendix C: Latitude Chart ............................................57

Appendix D: EC Handbox ..............................................58

Appendix E: Mounting the Model SC-8 Optical Tube ....62

Appendix F: Basic Astronomy ........................................63

TELESCOPE FEATURES

1) 1!

Fig. 1a: The LXD75-Series Telescope Optical Assembly (Schmidt-Newtonian model with Autostar handbox shown; Electronic Controller model users, see Appendix D, page 58).

fIe

Fig. 1b: Close up of Focuser and Viewfinder Assembly, Schmidt-Newtonian shown. (See Fig. 1a for overview.) For a close up of the refractor focuser assembly, see Fig. 10b, page 13.

Fig. 1c: The LXD75-Series Tripod.

1* 1(

2$ 2!

2@ 2#

Fig. 1d: The LXD75-Series Mount; insert shows opposite side of Mount.

3) 2(

2* 2^

Fig. 1e: The LXD75-Series Computer Control Panel (see 2$ above).

Legend

1. Eyepiece Thumbscrew

2. Eyepiece Holder

3. Eyepiece

4. Viewfinder (VF)

5. VF Collimation Screws

6. VF Front Cell

7. VF Bracket

8. Focus Knobs

9. Corrector/Dust Cover

10. Optical Tube

11. Cradle Assembly

12. Autostar Handbox

13. Cradle Ring Lock Knobs

14. Cradle Rings

15. VF Bracket Screws

16. Focus Lock Knob

17. Dec. Lock

18. Polar VF Cap

19. Dec. Setting Circle

20. Counterweight Shaft Base

21. Counterweight, Lock Knobs

22. Counterweight Shaft

23. Counterweight Safety Cap

24. Computer Control Panel

25. R.A. Motor Drive

26. Latitude Adjustment Handles

27. Azimuth Control Knobs

28. Latitude Dial

29. Polar Alignment VF

30. Polar Alignment Reticle, LED

31. R.A. Setting Circle

32. R.A. Setting Circle Lock Knob

33. R.A. Lock

34. Dec. Motor Drive

35. T-Handle Lock and Shaft

36. Spreader Bar

37. Tripod Mounting Base

38. Tripod Legs

39. Spreader Tension Knob

Caution:

other than standard Meade accessories may cause damage to the telescope’s internal electronics and may void the Meade warranty.

Using products

d Want to learn more

about the

available for your

LXD75-Series

telescope?

See OPTIONAL

ACCESSORIES

37.

eyepieces

, page

e Want to learn more

about

aligning the

viewfinder? See page

14.

h Want to learn more

about

attaching the

viewfinder

12.

? See page

1! Want to learn more

about assembling your telescope?

See

ASSEMBLING YOUR

TELESCOPE

, page 11.

1@ EC Handbox users,

see Appendix D, page 62, for more information.

LXD75-Series:Your Personal Window to the Universe

The Meade LXD75-Series models are versatile, high-resolution telescopes. Supplied with either an Electronic Controller or an Autostar handbox, the offer unmatched mechanical and electronic performance.

LXD75-Series telescopes reveal nature in an ever-expanding level of detail.

The Observe the feather structure of an eagle from 50 yards or study the rings of the planet Saturn from a distance of 800 million miles. Focus beyond the Solar System and observe majestic nebulae, ancient star clusters, and remote galaxies. Meade Series telescopes are instruments fully capable of growing with your interest and can meet the requirements of the most demanding advanced observer.

Refer to Figures 1a through 1e for the following features:

LXD75-Series models

LXD75-

B Eyepiece Thumbscrew: Tightens the eyepiece (see d) in place. Tighten to a

firm feel only.

C Eyepiece Holder: Holds eyepiece in place. Holders supplied for both 1.25" and

2" eyepieces.

Diagonal (not shown, achromatic refractor and Schmidt-Cassegrain models

Provides a more comfortable right-angle viewing position. Slide the diagonal

only):

directly into the eyepiece holder ( piece holder to a firm feel only. See page 13 for a photo and more information.

see c) and tighten the thumbscrew on the eye-

D Eyepiece: Place the supplied Super Plössl 26mm eyepiece into the eyepiece

holder or the diagonal and tighten in place with the eyepiece thumbscrew (

b). The eyepiece magnifies the image collected in the optical tube.

D 8 x 50mm (all models, except N-6EC Newtonian) or 6 x 30mm (N-6EC

Newtonian only) Viewfinder

crosshairs that enables easy centering of objects in the telescope eyepiece (

: A low-power, wide-field sighting scope with

d).

E Viewfinder Collimation Screws (6): Use these screws to adjust the alignment of

the viewfinder.

F Viewfinder Front Cell and Locking Ring: Adjust the front cell to focus the

viewfinder. See step 3, page 14 for more details. The viewfinder is supplied with a small dust cover placed over the front cell.

G Viewfinder Bracket: Holds the viewfinder in place. H Focus Knobs:

motion focused on objects from a distance of about 75 ft. to infinity. Rotate the focus knobs to focus on objects.

to achieve precise image focus. The LXD75-Series telescopes can be

Moves the telescope’s focuser drawtube in a finely-controlled

I Corrector/Dust Cover: Place the dust cover (not visible in photo) over the cor-

rector when storing the telescope.

Note: The dust cover should be replaced after each observing session and the power turned off to the telescope. Allow time for any dew that might have collected during the observing session to evaporate prior to replacing the dust cover.

see

1) 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.

1! Cradle Assembly: Attaches to mount base. See 1# and 1$. 1@ Autostar™: See pages 9 and 10 for a description of features. 1# Cradle Ring Lock Knobs (2) and Washers (2): Slide washers onto lock knobs

before inserting.

1$ Cradle Rings (2): Part of the cradle assembly (see 1!); h

ly in place.

Tighten to a firm feel to secure the optical tube in place.

old the optical tube firm-

Caution When loosening the Dec. lock, be sure to support the optical tube (18, Fig. 1a). The weight of the tube could cause the tube to swing suddenly.

2* Want to learn more

about

setting the lati-

tude dials?

See STEP 6, page 12.

1% Viewfinder Bracket Screws: Tighten to a firm feel to hold viewfinder securely in

see E and h). See page 12 for more information.

place (

1^ Focus Lock Knob: Designed to prevent the focuser drawtube from moving when

a heavy accessory, such as a camera, is attached to the focuser assembly. For normal observing with an eyepiece and diagonal, it is not necessary to use the lock knob.

1& Declination (Dec.): Controls the manual movement of the telescope. Turning the

Dec. lock counterclockwise unlocks the telescope enabling it to be freely rotated by hand about the Dec. axis. Turning the Dec. lock clockwise (to a firm feel only) tightens the lock and prevents the telescope from being moved manually, but engages the Dec. motor drive (see

3$) for Autostar operation.

1* Polar Viewfinder Cap: Remove this cap when using the polar viewfinder (see 2(). 1( Dec. Setting Circle: See APPENDIX A, page 50, for more information.

2) Counterweight Shaft Base: Thread, along with the shaft, to the mount. See

page 11 for more information.

2! Counterweight and Counterweight Lock Knob: Counterbalances the weight of

the optical tube, and adds stability to the mount. Tighten the lock knob on the side of the counterweight to a firm feel to prevent the weight from sliding on the shaft.

2@ Counterweight Shaft: Slide the counterweight onto this shaft (see 2!). 2# Counterweight Safety Cap: Prevents the counterweight from accidentally slip-

ping off the end of the counterweight shaft.

2$ Computer Control Panel (see Fig. 1e):

A. Handbox (HBX) Port

) into this port.

Fig. 2

B. 12v DC Power Connector: Plug the battery pack into this connector.

The telescope assembly also may be powered from either a 12v DC auto cigarette lighter plug using the optional #607 Cigarette Lighter Adapter or from a standard 115v AC home outlet using the optional #547 Power Adapter with Cable or #547F Power Adapter for 220v outlets. See

C. LED: Illuminates when power is supplied to the Autostar or EC hand-

box and the telescope’s motor drive.

D. ON/OFF Switch: Turns the Computer Control Panel and Autostar ON

or OFF.

E. AUX Port:

See

F. Dec Port:

for Autostar to control the motor drive.

OPTIONAL ACCESSORIES, page 38.

Provides connection for current and future Meade accessories.

OPTIONAL ACCESSORIES, page 38.

Plug the coil cord from the Dec. motor assembly into this port

: Plug the Autostar or EC handbox coil cord (10,

2% Right Ascension (R.A.) Motor Drive Assembly: Controlled by Autostar or EC

handbox. Moves the optical tube along the R.A. axis. The R.A. Lock (see must be tightened to a firm feel in order for the R.A. motor to operate.

3#)

2^ Latitude Adjustment T-Handles (2): Sets the latitude of your observing location.

The two T-handle screws work in a "push - pull" operation—as you tighten one, loosen the other.

2& Fine Azimuth Control Knobs: Fine tune the side-to-side movement of the tele-

scope when centering Polaris in the telescope eyepiece or when using the polar alignment viewfinder (see

2().

2* Latitude Dial: Set the latitude of the observing site on this dial using the latitude

T-handle screws. For more information see Step 6, page 12.

2( Polar Alignment Viewfinder: Allows you to precisely polar align the telescope.

Useful when performing astrophotography. See page 52.

3) Polar Alignment Viewfinder Reticle and LED Knob: Rotate the knob to switch

on or off the LED that illuminates the reticle within the polar alignment finder. Be

2( Want to learn more

about the ment viewfinder?

See the The Polar

Alignment Viewfinder

page 52.

polar align-

Fig. 1f: The tripod leg lock knob.

Fig. 1g: The LXD75-Series Battery Pack and holder.

sure to turn off the LED when finished with the polar viewfinder. Powered by (factory-supplied) batteries contained within.

3! R.A. Setting Circle: See APPENDIX A, page 50, for more information. 3@ R.A. Setting Circle Lock Knob: Rotate the knob to lock the R.A. Setting Circle

3!) in place.

(see

3# R.A. Lock: Controls the manual movement of the telescope. Turning the R.A.

lock counterclockwise unlocks the telescope enabling it to be freely rotated by hand about the R.A. axis. Turning the R.A. lock clockwise (to a firm feel only) tightens the lock and prevents the telescope from being moved manually, but engages the R.A. motor drive (see

2%) for Autostar or EC handbox operation.

3$ Dec. Motor Drive Assembly: Controlled by Autostar or the EC handbox. Moves

the optical tube along the Dec. axis. The Dec. Lock (see a firm feel in order for the Dec. motor to operate.

1&) must be tightened to

3% T-Handle Lock and Shaft: Place the spreader bar (see 3^) over the shaft and

thread the shaft into the tripod mounting base/mounting base (see tighten to a firm feel to secure the tray to the tripod and keep the tripod stable.

HOW TO ASSEMBLE YOUR TELESCOPE, page 11 for more information.

See

3&) and

3^ Spreader Bar: Holds the tripod legs securely in place and also acts as a holder

for extra eyepieces.

3& Tripod Mounting Base: Set the telescope mount into the tripod mounting base

and secure into place using the T-handle lock and shaft. See

YOUR TELESCOPE, page 11 for more information.

HOW TO ASSEMBLE

3* Variable Height Tripod Legs (3): Supports the telescope mount. The mount

attaches to the top of the tripod.

3( Spreader Bar Tension Knob: Tighten to secure the spreader bar (see 3^)

against the tripod legs.

4) Tripod Leg Lock Knobs (one on each leg): Loosen these knobs to slide the

inner leg extension. Tighten the knobs to a firm feel to lock in the height of the tripod.

4! Battery Pack and holder (see Fig. 1f): Plug into the 12v DC power connector

B, Fig. 1e) of the computer control panel. Insert 8 (user-supplied) D-cell

( batteries to power motor drives and Autostar handbox.

4! Want to learn how to

install the batteries? See step 12, page 13.

Caution: Use care to install batteries as indicated by the battery compartment. Follow battery manufacturer's precautions. Do not install batteries backwards or mix new and used batteries. Do not mix battery types. If these precautions are not followed, batteries may explode, catch fire, or leak. Improperly installed batteries void your Meade warranty. Always remove the batteries if they are not to be used for a long period of time.

LXD75 TIPS

Join an Astronomy Club, Attend a Star Party

One of the best ways to increase your knowledge of astronomy is to join an astronomy club. Check your local newspaper, school, library, or telescope dealer/store to find out if there’s a club in your area.

At club meetings, you will meet other astronomy and Meade enthusiasts with whom you will be able to share your discoveries. Clubs are an excellent way to learn more about observing the sky, to find out where the best observing sites are, and to compare notes about telescopes, eyepieces, filters, tripods, and so forth.

Often, club members are excellent astrophotographers. Not only will you be able to see examples of their art, but you may even be able to pick up some “tricks of the trade” to try out on your tography with the LXD75-Series.

Many groups also hold regularly scheduled Star Parties at which you can check out and observe with many different telescopes and other pieces of astronomical equipment. Magazines such as Star Parties around the United States and Canada.

LXD75-Series telescope. See page 36 for more information about pho-

Sky & Telescope and Astronomy print schedules for many popular

Important Note: The model SN-6EC, model SN-8EC, and model AR5EC are equipped with an Electronic Controller handbox, rather than the Autostar Handbox. Several of the following procedures, such as Tracking Objects and Initializing Autostar (to name but a few), are relevant only to models equipped with the Autostar handbox and do not apply to the EC models. For more information about the EC handbox,

APPENDIX D: EC

see

HANDBOX

, page 58.

AUTOSTAR FEATURES

Fig. 2: The Autostar Handbox.

Note: Autostar does not require batteries; the telescope’s batteries supply power to Autostar.

Tour the Cosmos with Just the Push of a Button

Control of most LXD75-Series telescope models (excluding the EC models; see margin note) is through the operation of Autostar. Nearly all functions of the telescope are accomplished with just a few pushes of Autostar’s buttons. Some of the major features of Autostar are:

■ Automatic GO TO capability: Automatically move the telescope to any of the

more than 30,000 objects stored in the object library.

■ Take a guided tour of the best celestial objects to view on any given night of the

year.

■ Download the latest satellite data and software revisions directly from the Meade

website (

■ Access a glossary of astronomical terms.

■ Fully automatic tracking of celestial objects.

www.meade.com) and share software with other Autostar enthusiasts.

Features

The Autostar Computer Controller provides control of virtually every telescope function within a compact handbox. Autostar has soft-touch keys designed to have a positive feel. The LCD (Liquid Crystal Display) is backlit with a red LED (Light Emitting Diode) for easy viewing in the dark. The backlit display, key arrangement, and sequential menu structure make Autostar extremely user friendly.

B 2-Line LCD Display: This screen displays Autostar's menus and other informa-

tion about the telescope.

■ Top line: Lists the primary menu.

■ Bottom line: Contains other menus that may be selected, menu options, tele-

scope status, or information about a function that is currently being performed.

C ENTER Key: Press to go to the next menu level or to choose an option in a

menu. The ENTER key is similar to the RETURN or ENTER key on a computer.

MOVING THROUGH AUTOSTAR'S MENUS, page 19 and AUTOSTAR’S MENUS,

See page 25.

Tip:

If the "ENTER to Sync" feature is accessed by mistake, press MODE to return to the previous screen.

E Want to learn more

about using the function? See page

21. Want to learn how to

perform a

search? See page 21.

Definitions:

"Slew" means to move the telescope's optical tube to a selected object.

Fig. 3: Spread out the tripod legs. (See next page.)

Thread shaft through the mounting base

Braces

Tension

Knob

T-Handle

Fig. 4: Thread T-handle shaft into base. (See next page.)

Spreader Bar

GO TO

spiral

Note: If ENTER is pressed for two seconds or more and then released,

Autostar emits a beep and “ENTER to Sync” is displayed. "ENTER to Sync" may be used only after your telescope has been aligned and is pointing at an object. See page 30 for more details.

3 MODE Key: Press to return to the previous menu level. The top menu level is

“Select Item." The MODE key is similar to the ESCAPE key on a computer.

Note: Pressing MODE repeatedly while in the “Select Item” level moves Autostar to the topmost screen: “Select Item: Object.”

Note: If MODE is pressed and held for two seconds or more, information about the telescope's status displays.When the status displays, press the Scroll keys (

■

Right Ascension and Declination (astronomical) coordinates

■ Altitude (vertical) and Azimuth (horizontal) coordinates

■ Local Time and Local Sidereal Time (LST)

■ Timer and Alarm Status

Press MODE again to return to the previous menu.

7, Fig. 2) to display the following information and more:

E GO TO Key: Press to slew (move) the telescope to the coordinates of the cur-

rently selected object. While the telescope is slewing, the operation may be aborted at any time by pressing any key except GO TO. Pressing GO TO again resumes the slew to the object. Also, press GO TO after a slew is completed to activate a "spiral search."

F Arrow Keys: Press to slew the telescope in a specific direction (up, down, left,

and right), at any one of nine different speeds. See

SLEW SPEEDS, page 16.

G Number Keys: Press to input digits 0 to 9. When data is not being entered, the

Number keys can be used to change the slew speed. To operate, just press a number key (1 is the slowest speed, 9 is the highest speed). Press the Number key "0" to turn on and off the red utility light on the top of the handbox.

H Scroll Keys: Press to access options within a selected menu. The menu is dis-

played on the first line of the screen. Options in that menu are displayed, one at a time, on the second line. Press the Scroll keys to move through the options. Press and hold a Scroll key to move quickly through the options.

I ? Key: Press to access the "Help" function. Help provides on-screen information

on how to accomplish whatever task is currently active. Hold down the ? key and then follow the prompts on the display to access details

of Autostar functions in the Help feature. The Help system is essentially an onscreen instruction manual.

If you have a question about an Autostar operation, ALIGNMENT, second line. When satisfied with the Help provided, press MODE to return to the original screen and continue with the chosen procedure.

etc., hold down the ? key and follow the directions that scroll on the

e.g., INITIALIZATION,

J Coil Cord Port: Plug one end of the Autostar coil cord (see 1)) into this port

located at the bottom of the Autostar handbox and the other end into the HBX port of the computer control panel (

A, Fig. 1e).

1) Coil Cord: Plug one end of the Autostar coil cord into the HBX port (A, Fig. 1e)

of the computer control panel of the telescope and the other end into the Autostar coil cord port (See

J).

1! RS232 Port: Plug in RS232 connections for downloading and connecting to com-

puter. Useful for downloading the latest satellite data and software revisions directly from the Meade website ( AstroFinder™ Software and Cable Connector Kit. See page 38.

www.meade.com) Requires optional #505

OPTIONAL ACCESSORIES,

1@ Utility Light: Use this built-in red light to illuminate star charts and accessories

without disturbing your eye's adaptation to darkness. Press "0" to turn the light on and off.

Bushing

Fig. 5a: Slide bushing over shaft.

E-clip

Second slot

GETTING STARTED

As you unpack your telescope, carefully note the following parts. The assembly is shipped in separate boxes.

Telescope Assembly

■ Equatorial mount with polar alignment finder

■ Heavy duty, adjustable aluminum tripod with leg braces, three tripod leg lock

knobs, and a captive mount locking knob

■ Complete optical tube assembly including primary mirror with dust cover and a

rack-and-pinion focuser and eyepiece holders for both 1.25" and 2" eyepiece holders, tube cradle assembly with two rings and two lock knobs

■ Super Plössl (SP) 26mm eyepiece

■ Counterweight and counterweight shaft. The 8" and 10" models include extra

counterweights.

■ 8 x 50mm (all models, except N-6EC Newtonian) or 6 x 30mm (N-6EC

Newtonian only)

■ Factory-mounted dual electronic motor drive assembly

■ Autostar handbox, detachable coil cord, or Electronic Controller

■ Battery pack and holder

Accessories

■ Hex keys, T-Adapter (included with Schmidt-Newtonian models only)

viewfinder.

Fig. 5b: Snap e-clip all the way onto shaft above mount (shown partially attached).

Fine Azimuth Control Knobs

Protrusion

Fig. 5c: Attach the mount to the tripod.

Dec. Setting Circle

Shaft Base

Counterweight

Lock Knob

Shaft

Safety Cap

Fig. 6: Attach counterweight assembly.

Place mount over shaft with bushing and c-clip.

How to Assemble Your Telescope

The giftboxes contain the optical tube assembly and the tripod with the equatorial mount. The accessories are located within compartments custom-cut into the styrofoam block inserts.

Remove the components from the giftboxes: Remove and identify the tele-

scope’s equipment. Refer to Figures 1a through 1f for images of the parts and the overall assembly of your telescope. When removing the tripod from the giftbox, hold the assembly parallel (horizontal) to the ground or the inner tripod leg extensions will slide out as they are not locked in place.

Adjust the tripod legs. Spread the tripod legs as far as they will open. See Fig. 3.

Attach the spreader bar to the tripod with shaft: Thread the tension knob onto

the shaft (see Fig. 4). Place the spreader bar over the T-handle shaft. Slide the bushing, the wide open side facing downward, onto the shaft as far as it will go

Fig. 5a). Then slide the shaft up through the tripod mounting base (37, Fig. 1c).

( Above the mount, snap the e-clip into the second, narrower precut slot (see Fig. 5a) of the shaft (Fig. 5b).

4. Attach mount to tripod base: Place the mount over the tripod mounting base 37, Fig. 1c) and onto the shaft, with the protrusion on top of the tripod's base

( positioned between the fine azimuth control knobs (27, Fig. 1d). See Fig. 5c. If necessary, back off the azimuth control knobs wide enough for protrusion to fit between them.

Tighten the T-handle to a firm feel. This attachment keeps the tripod and the telescope mount securely in place. Then line up the spreader bar braces so that they are each touching one of the tripods legs. Tighten the tension knob ( 1c) to a firm feel. When you wish to collapse the tripod, loosen the tension knob and move the braces off the legs. You do not need to remove the T-handle/shaft.

Attach the counterweight(s) to the counterweight shaft: Place the counter-

weight shaft base (20, Fig. 1d) over the threaded end of the shaft (22, Fig. 1d). Thread the shaft and base assembly into the hole beneath the Dec. setting circle as depicted in

Fig. 6.

Look through the hole in the counterweight and note the pin blocking the hole. Tilt the counterweight slightly and the pin moves out of position, clearing the hole. If the pin does not move, unscrew the counterweight lock knob slightly until the pin moves.

Unscrew the safety cap (

23, Fig. 1d) from the shaft. Holding the counterweight (21, Fig. 1d) firmly in one hand, slip the counterweight to approximately the midpoint of the counterweight shaft (22, Fig. 1d). Tighten the counterweight lock

39, Fig.

Secondary Lock Knob

Cradle Lock Knob

Fig. 7: Attach cradle to base mounting slot and tighten locking knobs.

Fig. 8: Place optical tube in rings and loosely tighten cradle ring lock knobs.

Viewfinder Mounting Screws and Nuts

Fig. 9a: Viewfinder assembly, Newtonian reflector models.

Fig. 9b: Viewfinder assembly, refractor and Schmidt-Newtonian and Schmidt-Cassegrain models models.

Cradle Assembly Slot

Cradle Rings

Lock Knobs

Note: Model SC-8 users:

After completing step 6, refer to APPENDIX E, page 62, step 1, for information on how to attach the SC optical tube to the mount.

knob to a firm feel. Replace the safety cap.

Note: If the counterweight ever slips, the safety cap (23, Fig. 1d) prevents the counterweight from sliding entirely off the shaft. Always leave the

safety cap in place when the counterweight is on the shaft.

6. Set the latitude: Setting the latitude is easier if it is set before you attach the opti-

cal tube to the assembly. Locate the latitude dial (

28, Fig. 1d); note that there is

a triangular pointer above the dial located on the mount. The pointer is not fixed; it moves as the mount moves.

Determine the latitude of your observing location. See APPENDIX C: LATITUDE

, page 57, for a list of latitudes, or check an atlas. Move the latitude T-han-

CHART

dle screws in order to move the mount until the pointer points to your latitude. The two T-handle screws work in a "push - pull" operation—as you tighten one, loosen the other. When the pointer points at your latitude, tighten both screws until they make contact with the mount.

At your observing site, set up the telescope assembly so that the tripod leg below the Fine Azimuth Control Knobs (

27, Fig. 1c) approximately faces North (or

South in the Southern Hemisphere). Model SC-8 users, see APPENDIX E, page

62. Attach the cradle assembly to the mount: Remove the optical tube from the

cradle and slide the cradle assembly (11, Fig. 1a) onto the cradle mounting slot.

Fig. 7. The rounded base of the cradle assembly fits into the rounded por-

See tion of the mounting slot. Tighten both the cradle locking knob and the secondary locking knob to a firm feel.

8. Position optical tube: Unscrew the cradle ring lock knobs (13, Fig. 1a) and open

the cradle rings. While firmly holding the optical tube (

10, Fig. 1a), position it onto

the cradle rings (14, Fig. 1a) with the mid-point of the optical tube’s length lying roughly in the center of the cradle ring assembly. Point the tube so that the front end (this end comes shipped with the dust cover (9, Fig. 1a) over it) is oriented as depicted in

Fig. 1a. Then close the cradle rings (14, Fig. 1a) over the optical

tube. Loosely tighten the cradle ring lock knobs just to hold the tube securely in place until you balance it. See BALANCING THE TELESCOPE, page 13.

9. Attach viewfinder bracket: Newtonian models (Fig. 9a): Locate the viewfinder

bracket screws (

Fig. 9a) and remove the nuts from the screws. Slide the holes in

the viewfinder bracket over the viewfinder bracket screws. Replace the nuts and tighten to a firm feel only.

Attach viewfinder tube: Back off the viewfinder collimation screws (5, Fig. 1b) and slide the viewfinder tube into the bracket. Orient the viewfinder eyepiece as depicted in

THE VIEWFINDER, page 14.

Fig. 1b. Tighten the collimation screws to a firm feel. See ALIGNING

Attach viewfinder bracket: Achromatic refractor, Schmidt-Newtonian and Schmidt-Cassegrain models (15, Fig. 1b

and Fig. 9b ): Slide the track on the

bottom of the viewfinder bracket into the slot in the viewfinder mounting assembly (which is already attached to the tube). To secure the viewfinder to the mounting assembly, tighten the two thumbscrews to a firm feel only.

Attach viewfinder tube: Back off the viewfinder collimation screws (5, Fig. 1b) and slide the viewfinder tube into the bracket. Point the viewfinder eyepiece toward the focuser assembly. See Fig. 10b. Tighten the collimation screws to a firm feel. See

ALIGNING THE VIEWFINDER, page 14.

10. Insert the eyepiece: Schmidt-Newtonian and Newtonian models (Fig. 10a):

Lift to remove the dust cap from the eyepiece holder on the focuser assembly. Set the dust cap aside in a safe place and replace it when you have finished observing to protect the eyepiece assembly. Back off the eyepiece thumbscrews

1, Fig. 1a) and insert the supplied SP 26mm eyepiece (3, Fig. 1a) into the the

( eyepiece holder. Tighten the holder thumbscrews to a firm feel to secure the eyepiece.

Insert the eyepiece: Achromatic refractor and Schmidt-Cassegrain models (Fig. 10b):

Lift to remove the dust cap from the eyepiece holder on the focuser

assembly. Set the dust cap aside in a safe place and replace it when you have

Thumbscrew

Eyepiece

Holder

Fig. 10a: Insert eyepiece into holder and tighten thumbscrews.

Eyepiece

Thumbscrews

finished observing to protect the eyepiece assembly. Back off the eyepiece thumbscrews ( thumbscrews to a firm feel only. Insert the supplied SP 26mm eyepiece (

) into the the diagonal. Tighten the diagonal's thumbscrews to a firm feel to

1, Fig. 1b) and slide the diagonal into the holder and tighten the

3, Fig.

secure the eyepiece.

Note: Two eyepiece holders are included with your telescope—for both

1.25" and 2" eyepieces.To change eyepiece holders, unscrew the attached holder from the focuser and thread on the other holder.

11. Adjust the height of the tripod: Adjust the height of the tripod by loosening the

tripod lock knobs (

Fig. 11). Extend the sliding inner section of each tripod leg to

the desired length; then tighten each knob. Adjust the tripod to a height that is comfortable for viewing.

12.

Install Batteries: Insert eight (user-supplied) D-size batteries into the battery holder, oriented as shown in the diagram on the battery slots of the holder. Plug the battery pack into the 12v DC connector ( panel. See

Fig. 12.

B, Fig. 1e) on the computer control

Diagonal

Fig. 10b: Insert eyepiece into diagonal and tighten thumbscrews.

Fig. 11: Adjust the tripod height using the leg lock knobs.

Fig. 12: Battery holder.

Holder

Leg Lock Knob

A B C D E F

Fig. 13b: Reticle LED assembly: (A) Reticle Container; (B) LED; (C) Batteries; (D) Battery Holder; (E) Threaded Lid; (F) Cap.

leak. Improperly installed batteries void your Meade warranty. Always remove the batteries if they are not to be used for a long period of time.

13. Remove Plastic Strip from Reticle LED: The polar alignment reticle LED (30, Fig. 1d

) contains two watch batteries. The reticle's LED is shipped with a plastic strip between the two batteries to protect battery life. Unthread both the cap ( and the threaded lid ( cle assembly in teries (

C) into the battery holder (D) before inserting into the reticle container (A).

Note: Remember to turn off the LED when you are not using the reticle.

14. Plug in Autostar or EC Handbox: Plug the Autostar or EC handbox cable into

the HBX port (

E). Remove the plastic strip before using. Refer to the reti-

Fig. 13b and note the orientation of the batteries. Place the bat-

A, Fig. 1e).

Reticle LED

Fig. 13: Reticle assembly.

Balancing the Telescope

In order for the telescope to be stable on the tripod and also for it to move smoothly, it must be balanced. To balance the telescope, unlock the Right Ascension or R.A. lock (

33, Fig. 1d). When this axis is unlocked, the telescope pivots on the R.A. axis.

Later in the procedure, you will also unlock the Declination or Dec. lock ( When unlocked, the telescope pivots on the Dec. axis. Most of the motion of the telescope takes place by moving about these two axes, separately or simultaneously. Try to become familiar with these locks and observe how the telescope moves on each axis. To obtain a fine balance of the telescope, follow the method below:

1. Firmly hold the optical tube secure so that it cannot accidentally swing freely. Loosen the R.A. lock (

33, Fig. 1d). The optical tube now moves freely about the

R.A. axis. Rotate the telescope so that the counterweight shaft ( parallel (horizontal) to the ground.

17, Fig. 1d).

22, Fig. 1d) is

Viewfinder Bracket

Collimation Screws

Viewfinder Eyepiece

3. Achromatic refractor, Schmidt-Newtonian models and Newtonian models: Again, hold the optical tube so that it cannot accidentally swing freely. Lock the R.A. lock ( is able to move freely about the Dec. axis. Loosen the cradle ring lock knobs (

Fig. 1a)

33, Fig. 1d), and unlock the Dec. lock (17, Fig. 1d). The telescope now

13,

so that the main tube slides easily back and forth in the cradle rings. Move the main tube in the cradle rings until the telescope remains in one position without tending to drift down in either direction. Re-lock the Dec. lock (

Fig. 1d)

17,

The telescope is now properly balanced on both axes. Next, the viewfinder must be aligned.

Fig. 14a: Viewfinder assembly, refractor and Schmidt-Newtonian mod-

Collimation Screws

Fig. 14b: Viewfinder assembly, Newtonian models.

Important Note: Objects appear upside-down and reversed left-for-right when observed in the viewfinder. With refracting telescope models, objects viewed through the main telescope with the diagonal mirror in place are seen right-side-up, but reversed left-for-right.

This image inversion is of no consequence when observing astronomical objects, and in fact all astronomical telescopes yield inverted images.

During terrestrial observing, where a fully-correctly-oriented image (right-side up and correct left-for-right) is desirable, an optional Meade #928 45° Erect-Image Diagonal Prism is available.

OPTIONAL ACCES-

See

SORIES

, page 38.

Note that for SchmidtNewtonian models, no means of image inversion is available; while these telescopes may be used for terrestrial observing, the image will not be correctly oriented in either right-side-up or leftfor-right orientations.

Viewfinder Eyepiece

Viewfinder Bracket

Aligning the Viewfinder

The wide field of view of the telescope's viewfinder (4, Fig.1a) provides an easier way to initially sight objects than the main telescope's eyepiece (

3, Fig. 1a), which has a

much narrower field of view. If you have not already attached the viewfinder to the telescope tube assembly, follow the procedure described in step 9, page 12.

In order for the viewfinder to be useful, it must be aligned to the main telescope, so that both the viewfinder and telescope's optical tube (

10, Fig. 1a) point at the same

position in the sky. This alignment makes it easier to find objects: First locate an object in the wide-field viewfinder, then look into the eyepiece of the main telescope for a detailed view.

To align the viewfinder, perform steps 1 through 4 during the daytime; perform step 5 at night. Both the 6 x 30mm and the 8 x 50mm viewfinders align in an identical manner. Refer to

1. Remove the dust covers from the optical tube (

2. If you have not already done so, insert the low-power SP 26mm eyepiece (

1b)

Figs. 14a and 14b.

9, Fig. 1a) and the viewfinder.

3, Fig.

into the eyepiece holder of the main telescope. See step 10, page 12.

3. Look through the viewfinder eyepiece at an object at least one-half mile away

Tip: Remove the viewfinder tube from the bracket to simplify this operation). If

( the distant object is not in focus, turn the focus lock ring counterclockwise to loosen the viewfinder front cell (

6, Fig. 1b). Twist the front cell until focus is

achieved and retighten the focus lock ring.

4. Unlock the R.A. lock (

33, Fig. 1d) and the Dec lock (17, Fig. 1d) so that the tel-

escope turns freely on both axes. Then point the main telescope at a tall, welldefined and stationary land object (

e.g., the top of a telephone pole) at least 200 yards distant and center the object in the telescope's eyepiece. Focus the image by turning the focus knobs (

8, Fig. 1b). Retighten the R.A. and Dec. locks.

5. Look through the viewfinder and loosen or tighten, as appropriate, one or more of the viewfinder collimation thumbscrews (

5, Fig. 1b) until the viewfinder’s

crosshairs are precisely centered on the object you previously centered in the main telescope's eyepiece. You are now ready to make your first observations with your telescope.

NEVER point the telescope directly at or near the Sun at any time! Observing the Sun, even for the smallest fraction of a second, will result in instant and irreversible eye damage, as well as physical damage to the telescope itself.

Check this alignment on a celestial object, such as a bright star or the Moon, and make any necessary refinements, using the method outlined above in steps 3 and

With this alignment performed, objects first located in the wide-field viewfinder will also appear in the telescope's eyepiece.

Choosing an Eyepiece

A telescope’s eyepiece magnifies the image formed by the telescope’s main optics. Each eyepiece has a focal length, expressed in millimeters, or “mm.” The smaller the focal length, the higher the magnification. For example, an eyepiece with a focal length of 9mm has a higher magnification than an eyepiece with a focal length of 26mm.

Your telescope comes supplied with a Super Plössl (SP) 26mm eyepiece which gives a wide, comfortable field of view with high image resolution.

Note: Seeing conditions vary widely from night-tonight and site-to-site. Turbulence in the air, even on an apparently clear night, can distort images. If an image appears fuzzy and ill-defined, back off to a lower power eyepiece for a more well-resolved image

Fig. 15a and 15b

(see

below).

Note: For a list of magnifi-

cation ratings of the eyepieces available for the LXD75-Series telescopes,

OPTIONAL ACCES-

see

SORIES

, page 37.

Low power eyepieces offer a wide field of view, bright, high-contrast images, and eye relief during long observing sessions. To find an object with a telescope, always start with a lower power eyepiece such as the Super Plössl 26mm. When the object is located and centered in the eyepiece, you may wish to switch to a higher power eyepiece to enlarge the image as much as practical for prevailing seeing conditions. For information about optional eyepieces for the LXD75-Series models, see

ACCESSORIES, page 37.

OPTIONAL

The power, or magnification of a telescope is determined by the focal length of the telescope and the focal length of the eyepiece being used. To calculate eyepiece power, divide the telescope's focal length by the eyepiece's focal length. For example, a 26mm eyepiece is supplied with the LXD75-Series. The focal length of the 8" LXD75Series model is 812mm (see

SPECIFICATIONS, page 46).

Telescope Focal Length ÷ Eyepiece Focal Length = Magnification (Power)

Telescope Focal Length = 812mm Eyepiece Focal Length = 26mm 812 ÷ 26 = 31

The eyepiece power, or magnification is therefore 31X (approximately).

Observing by Moving the Telescope Manually

After the telescope is assembled and balanced as described previously, you are ready to begin manual observations. View easy-to-find terrestrial objects such as street signs or traffic lights to become accustomed to the functions and operations of the telescope. For the best results during observations, follow the suggestions below:

■ When you wish to locate an object to observe, first loosen the telescope’s R.A.

lock (

33, Fig. 1d) and Dec. lock (17, Fig. 1d). The telescope can now turn freely

on its axes. Unlock each axis separately and practice moving your telescope. Then practice with two unlocked axes at the same time. practice this step to understand how your telescope moves, as the movement of an equatorial mount is not intuitive.

■ Use the aligned viewfinder to sight-in on the object you wish to observe. When the

object is centered in the viewfinder’s crosshairs, re-tighten the R.A. and Dec. locks.

■ A telescope’s eyepiece magnifies the image formed by the telescope’s main

optics. Each eyepiece has a focal length, expressed in millimeters, or “mm.” The smaller the focal length, the higher the magnification. with a focal length of 9mm has a higher magnification than an eyepiece with a focal length of 26mm. Low-power magnification eyepieces offer a wide field of view, bright, high-contrast images, and relief of eye strain during long observing sessions. To observe an object with a telescope, always start with a low power eyepiece such as the SP 26mm

It is very important to

For example, an eyepiece

Fig. 15a & 15b: Jupiter; examples of the right amount of magnification and too much magnification.

LXD75 TIPS

Too Much Power?

Can you ever have too much power? If the type of power you’re referring to is eyepiece magnification, yes, you can! The most common mistake of the beginning observer is to “overpower” a telescope by using high magnifications which the telescope’s aperture and atmospheric conditions cannot reasonably support. Keep in mind that a smaller, but bright and well-resolved image is far superior to one that is larger, but dim and poorly resolved (see Figs. 15a and 15b). Powers above 400X should be employed only under the steadiest atmospheric conditions.

Autostar can calculate the best eyepiece for you to use. Try out the “Eyepiece Calc” feature in the Utilities menu.

Most observers should have three or four additional eyepieces to achieve the full range of reasonable magnifications possible with the LXD75-Series telescopes. See OPTIONAL ACCESSORIES, page 37.

Note: Autostar only prompts you to enter Country (or State) and City as described in steps 3, 4, and 5, the first time it is activated. These prompts do not appear again, unless you reset Autostar (see page 31).

However, if you need to re-enter this information (e.g., you change your geographic location), you can change the location information by using the Site option of the Setup menu. See

OBSERVING SITES

32, for detailed information.

RESET,

ADDING

, page

supplied with your telescope. When the object is centered and focused in the eyepiece, switch to a higher power eyepiece to enlarge the image as much as practical for prevailing viewing conditions. For information about other eyepieces available for your telescope, see OPTIONAL ACCESSORIES, page 37.

■ Once centered, an object can be focused by turning one of the knobs of the

focusing mechanism (

8, Fig. 1b). Notice that when observing astronomical

objects, the field of view begins to slowly drift across the eyepiece field. This motion is caused by the rotation of the Earth on its axis. Objects appear to move through the field more rapidly at higher powers. See TRACKING OBJECTS, page 17, for detailed information on how you can counteract the drift in the field of view.

Activate the Arrow Keys (Autostar Models Only)

Autostar's Arrow keys allow you to slew (move) the telescope up, down, right, or left. The following procedure describes how to activate Autostar's Arrow keys:

1. After the batteries are installed and Autostar's cord is plugged into the HBX port of computer control panel ( LCD display (1, Fig. 2).

2. A message warning not to look at the Sun scrolls across the display. Press the key prompted by Autostar to acknowledge that the Sun warning has been read and understood.

3. Press ENTER (

2, Fig. 2) repeatedly until "Country/State" appears on the display.

(Ignore the prompts requesting Date and Time. See page 19, for more information).

4. Use the Scroll keys (7, Fig. 2) to cycle through the database of countries, states, and provinces. Press ENTER when the correct location displays.

5. Autostar then prompts you to enter the nearest city (listed alphabetically) to the observing site. Use the Scroll keys to cycle through the database of cities. Press ENTER when the correct city appears on the display.

6. Autostar then prompts you to enter the model number of your telescope. Use the Scroll keys to cycle through the list of telescope models. Press ENTER when the correct model appears on the display.

7. The display then reads "Align: Easy." You now can use Autostar's Arrow keys to move the telescope to observe.

Note: If you go past the "Align: Easy" (or any other menu display you wish to select), press MODE to return to the previous display(s).

A, Fig 1e), a copyright message lights on the Autostar

INITIALIZING AUTOSTAR,

8. Press the Arrow keys (5, Fig. 2) to move the telescope up, down, right, or left. You can move the telescope at different speeds.

Slew Speeds (Autostar Models Only)

Autostar has nine slew speeds that move the optical tube at rates that are directly proportional to the sidereal rate and have been calculated to accomplish specific functions. Press a Number key ( about two seconds on Autostar’s display.

The nine available speeds are:

Number Key 1 = Guide (0.25 arc-min/sec or 0.004°/sec) Number Key 2 = 2x = 2 x sidereal (0.5 arc-min/sec or 0.008°/sec) Number Key 3 = 8x = 8 x sidereal (2 arc-min/sec or 0.033°/sec) Number Key 4 = 16x = 16 x sidereal (4 arc-min/sec or 0.067°/sec) Number Key 5 = 64x = 64 x sidereal (16 arc-min/sec or 0.27°/sec) Number Key 6 = 128x = 30 arc-min/sec or 0.5°/sec Number Key 7 = 1.5° = 90 arc-min/sec or 1.5°/sec Number Key 8 = 3° = 180 arc-min/sec or 3°/sec Number Key 9 = Max = 270 arc-min/sec or 4.5°/sec

6, Fig. 2) to change the slew speed, which is shown for

Note: If you wish to perform a more precise polar alignment for the purposes of astrophotography, see "Appendix B," page 52.

North

Point counterweight shaft straight down over mount.

Point optical tube to North

Level Mount

Fine Azimuth Control Knobs

Speeds 1, 2, or 3: Best used for fine centering of an object in the field of view of a higher power eyepiece, such as a 12mm or a 9mm eyepiece.

Speeds 4, 5, or 6: Enables centering an object in the field of a low-to-moderate power eyepiece, such as the standard Super Plössl 26mm.

Speeds 7 or 8: Best used for rough centering of an object in the viewfinder. Speed 9: Moves the telescope quickly from one point in the sky to another.

Observe the Moon

Point your telescope at the Moon (note that the Moon is not visible every night). Use your EC handbox or Autostar to practice using the Arrow keys and the slew speeds to view different features. The Moon contains many interesting features, including craters, mountain ranges, and fault lines. The best time to view the Moon is during its crescent or half phase. Sunlight strikes the Moon at an angle during these periods and adds a depth to the view. No shadows are seen during a full Moon, making the overly bright surface to appear flat and rather uninteresting. Consider the use of a neutral density Moon filter when observing the Moon. See

OPTIONAL ACCESSORIES, page

38. Not only does it cut down the Moon's bright glare, but it also enhances contrast,

providing a more dramatic image.

Tracking Objects

As the Earth rotates beneath the night sky, the stars appear to move from East to West. The speed at which the stars move is called the sidereal rate. You can setup your telescope to move at the sidereal rate so that it automatically tracks the stars and other objects in the night sky. The tracking function automatically keeps an object more or less centered in the telescope’s eyepiece.

To automatically track objects, you first need to learn how to set the polar home position of your telescope and then how to select "Targets: Astronomical" from the Autostar Setup menu. EC handbox users, see

APPENDIX D, page 58, for more information.

Fig. 16a: The polar home position, side view. Inset: Line up triangles on the mount.

Fig. 16a: The polar home position, front view.

Setting the Polar Home Position

1. Level the mount, if necessary, by adjusting the length of the three tripod legs.

2. Unlock the R.A. Lock (33, Fig. 1d). Rotate the Optical Tube Assembly until the counterweight shaft is pointing straight down over the mount. See Figs. 16a and

16b.

3. If you have not already done so, lift the telescope assembly and turn it so the tripod leg below the Fine Azimuth Control Knobs (27, Fig. 1c) approximately faces North (or South in the Southern Hemisphere). Release the Dec. lock (17, Fig. 1d) of the tripod, so that the optical tube (10, Fig. 1a) may be rotated. Rotate the optical tube until it points North (or South in the Southern Hemisphere). Then re-tighten the lock. Locate Polaris, the North Star, if necessary, to use as an accurate reference for due North (or Sigma Octantis in the Southern Hemisphere). See

4. If you have not already done so, determine the latitude of your observing location.

APPENDIX C: LATITUDE CHART, page 57, for a list of latitudes of major cities

See around the world. Use the latitude T-handle screws (26, Fig. 1d) to tilt the telescope mount so that the pointer indicates the correct latitude of your viewing location on the latitude dial (

5. If steps 1 through 4 above were performed with reasonable accuracy, your telescope is now sufficiently well-aligned to Polaris, the North Star, for you to begin making observations.

Once the mount has been placed in the polar home position as described above, the latitude angle need not be adjusted again, unless you move to a different geographical location (

i.e., a different latitude).

Important Note: For almost all astronomical observing requirements, approximate settings of the telescope’s latitude and other settings are acceptable. Do not allow undue attention to precise settings of polar home position of the telescope to interfere with your basic enjoyment of the instrument.

LOCATING THE CELESTIAL POLE, page 51.

28, Fig. 1d). See step 6, page 12 for more information.

Tip:

You can change the telescope's slew rate while centering an object in the eyepiece. See SLEW

SPEEDS

more information.

Important Note: While performing the automatic tracking procedure, you may use the Arrow keys to move the telescope or you may also loosen the telescope locks ( 33, Fig. 1d) and move the optical tube manually to locate another object in the sky. The tracking function will continue to be operational and the telescope will track the new object.

, page 16 for

17 and

Observe a Star using the Automatic Tracking Feature

In this example, Autostar's Arrow keys are used to find a star, and then Autostar's tracking capability automatically keeps the star centered in your telescope's eyepiece. EC handbox users, see EC handbox.

1. If you have activated the Arrow keys and completed setting the telescope in the polar home position, Autostar's display now reads "Align: Easy."

If you have not used Autostar yet or have just plugged it into the HBX port,

form the procedures described in

TING THE POLAR HOME POSITION, page 17. Then go to Step 2 of this procedure.

If you have been using Autostar to perform other functions and the display does not read "Align: Easy," follow these steps:

a. Press MODE ( b. Press the Scroll Up key ( c. Press ENTER (

2. Press MODE (

3. Press the Scroll Down key repeatedly until "Setup: Targets" displays. Press ENTER (

2, Fig. 2).

4. "Targets: Terrestrial" displays. Press one of the Scroll keys once ( "Targets: Astronomical" now displays.

5. Use the Arrow keys ( viewfinder to help line up on the star. You may choose any unobstructed, bright star for the purposes of this example. Use Autostar's Arrow keys to center the star in the eyepiece. Once the star is centered, press ENTER to select "Astronomical." The telescope's tracking motors then engage. It may take the tracking motors several seconds to begin tracking. When they do, it may be necessary to once again center the star in the eyepiece. The tracking motors will then keep any star you choose in the center of the eyepiece.

APPENDIX D, page 58, for information about tracking with the

Go to Step 2.

per-

ACTIVATE THE ARROW KEYS, page 16 and SET-

3, Fig. 2) repeatedly until "Select Item: Object" displays.

7, Fig. 2) once. "Select Item: Setup" displays.

2, Fig. 2). "Setup: Align" displays. Go to Step 3.

3, Fig. 2). "Setup: Align" displays.

7, Fig. 2).

5, Fig. 2) to locate a bright star in the night sky. Use the

6. Press and hold the ENTER key for a few seconds and then release to stop tracking. You may also stop tracking by choosing "Terrestrial" in the Targets menu.

Using Autostar's GO TO Capabilities (Autostar Models Only)

Before you can use Autostar's GO TO capabilities, you must first:

• Learn how Autostar's keys move through the menus

• Initialize Autostar

• Place the telescope in the polar home position, if you have not already done so

SETTING THE POLAR HOME POSITION, page 17)

(see

• Select "Align: Easy" from Autostar's menus

LXD75 TIPS

Which One’s the Alignment Star?

If Autostar has chosen an alignment star with which you are unfamiliar, how can you be sure if the star in your eyepiece is really the alignment star?

The rule of thumb is that an alignment star is usually the brightest star in that area of the sky. If you perform a GO TO to an alignment star and you're not sure if you have located the alignment star or it isn't in the eyepiece, look through your viewfinder. When you view an alignment star in the viewfinder, it stands out dramatically from the rest of the stars in that portion of the sky. The viewfinder will help you locate a star more quickly than the eyepiece, because it has a much wider field of view than the eyepiece. Using Autostar, set the slew speed to 6 or higher and use the Arrow keys to center the alignment star in the viewfinder. If your viewfinder has been aligned with the telescope, the alignment star should now be in the eyepiece. Set the slew speed to 4 or less and center the star in the eyepiece. Also see the "Spiral Search" tip on page 21.

If you have an obstruction, such as a tree or a building blocking your view of the alignment star, or if you have any doubts at all about the star that has been chosen, no problem. Just press the Scroll Down key and Autostar will find another star to align upon.

Tip:

When multiple choices are available within a menu option, the current option is usually displayed first and highlighted by a right pointing arrow (>).

Definition: Initialization is a proce-

dure that ensures that Autostar operates correctly. When you first use Autostar, it doesn't yet know where the observation location site is or the time or date of the observation session.

You will enter information, such as the current time and date, and observation location.

Autostar uses this information to precisely calculate the location of celestial objects (such as stars and planets) and to automatically move your telescope correctly for various operations.

Moving Through Autostar’s Menus (Autostar Models Only)

Autostar's menus are organized for quick and easy navigation.

■ Press ENTER (2, Fig. 2) to go deeper into Autostar menu levels.

■ Press MODE (3, Fig. 2) to move back toward the top menu level.

■ Press the Scroll keys (7, Fig. 2) to move up and down through the options avail-

able for each menu level.

■ Press the Arrow keys (5, Fig. 2) to enter characters.

■ Press the Number keys (6, Fig. 2) to enter digits.

Initializing Autostar (Autostar Models Only)

This exercise describes how to initialize Autostar.

Note: Normally, you will enter the Time and Date at the beginning of each observing session, but you will only perform the full Initialization procedure (i.e., entering the Location information and selecting the model number as well as entering the Time and Date) the first time you use Autostar or after performing a Reset.

1. Make sure that the telescope is assembled correctly, and that the batteries are installed as described previously.

2. Make sure the On/Off switch ( cord into the HBX port (A, Fig. 1e), as previously described. Push the On/Off switch to the On position.

3. A copyright message lights on Autostar’s LCD display and a message warning not to look at the Sun scrolls across the display. Press the key prompted by Autostar to acknowledge the message has been read and understood.

4. The Getting Started menu displays a scrolling message with two choices: a. Press and hold down the ? key (

tion on Autostar functions and controls. When finished, press MODE (3, Fig.

2) to exit Help, or,

b. Press ENTER (2, Fig. 2) to bypass the Help tutorial and continue with

Initialization.

5. Autostar prompts you to enter the current date: a. Press the Numbers keys (

desired number is displayed, use the Right Arrow key ( cursor from one number to the next in the day display (or use the Left Arrow key to move in the other direction across the display, if necessary).

b. Use the Right Arrow key (5, Fig. 2) to move the cursor to the month. Use the

Scroll keys (

7, Fig. 2) to cycle through the list of months. When the current

month is displayed, use the Right Arrow (5, Fig. 2) to move the cursor to the year.

c. Use Number keys (6, Fig. 2) to enter all four digits of the current year. Use

the Right Arrow key ( next.

d. Press ENTER (2, Fig. 2) when the entire date has been entered.

6. Autostar then prompts you to enter the current time. Use the Number keys to enter digits. The Right and Left Arrow keys move the cursor across the screen as described in the previous step. Enter the current time (use a "0" for the first digit if less than 10). Use the Up Arrow key ( "PM,'" or "blank." The "blank" option (screen displays neither AM nor PM) selects the 24-hour (

i.e., military time) clock. Then press ENTER to start the clock.

7. Autostar then prompts you to enter the status of Daylight Savings Time. Press one of the Scroll keys to toggle between the YES/NO settings. Select the desired setting by pressing ENTER.

Note: Daylight Savings Time may be referred to by a different name in various areas of the world.

D, Fig. 1e) is in the Off position. Plug Autostar's

8, Fig. 2) for about 2 seconds for informa-

6, Fig. 2) to enter numbers 0 through 9. After the

5, Fig. 2) to move the

5, Fig. 2) to move the cursor from one number to the

7, Fig. 2) to scroll through "AM,"

8. If you have previously entered the Country/State and City of your observing site (as described in

ACTIVATE THE ARROW KEYS, page 16), go to step 9. If you have

not entered this information, perform the following steps:

a. Autostar prompts you to enter the Country or State (listed alphabetically) of

the observing site. Use the Scroll keys to cycle through the database of countries, states, and provinces. Press ENTER when the correct location displays.

b. Autostar then prompts you to enter the nearest city (listed alphabetically) to

the observing site. Use the Scroll keys to cycle through the database of cities. Press ENTER when the correct city appears on screen.

9. Autostar then prompts you to enter the model number of your telescope. Use the Scroll keys to cycle through the list of telescope models. Press ENTER when the correct model appears on the display.

Note: Autostar only prompts you to enter Country/State and City and model number the first time it is activated. These prompts do not appear again, unless you reset Autostar (see need to enter this information (e.g., you change your geographic location), you can do so by using the Site option of the Setup menu. See ADDING

OBSERVING SITES, page 32, for detailed information.

10. System Initialization is complete and the display reads "Align: Easy." After performing the Initialization procedure, you MUST train your drive.

RESET, page 31). However, if you

Training the Drive (Autostar Models Only)

Next, train the drive using Autostar. Perform this procedure the first time you use Autostar with your telescope, after a Reset, or if you are experiencing any pointing accuracy problems. Training the drive gives your telescope a higher degree of pointing accuracy.

Note: Use a terrestrial object, such as a telephone pole or lamp post, to train the drive. It is best to perform this procedure during the daytime.

1. If you have just performed INITIALIZING AUTOSTAR, go to step 2. If you have not yet initialized Autostar, go to page 19 and follow the procedure

described in INITIALIZING AUTOSTAR.Then go to step 2 of this procedure.

2. Keep pressing MODE until "Select Item: Object" displays.

3. Press the Scroll Up key once. "Select: Item: Setup" displays.

4. Press ENTER to access the Setup menu. "Setup: Align" displays.

5. Keep pressing the Scroll Up key until "Setup: Telescope" displays.

6. Press ENTER to access the Telescope menu. "Telescope: Focal Length" displays.

7. Keep pressing the Scroll Down key until "Telescope: Train Drive" displays.

8. Press ENTER to choose the Train Drive option. "Train Drive: Az/RA Train" displays.

9. Press ENTER to begin Az/R.A. (Right Ascension) training.

10. "Drive Setup: For this...." begins to scroll across the display. This is a reminder to

point your telescope at a terrestrial object. Loosen the R.A. and Dec. locks ( and 33, Fig. 1d) and point the telescope at an object. Then re-tighten the locks. Press ENTER when the telescope is pointing at the desired terrestrial object.

11. "Center reference object" displays. Center your target object using the Arrow keys. When centered, press ENTER.

12. The telescope slews and "Press > until it is centered" displays. Press the Right Arrow key until the target is centered again. Then press ENTER.

Note: If you pass the object when pressing the Arrow key, you cannot slew the telescope back in the other direction. Press MODE until "Train Drive: Az/RA Train" displays and begin the procedure over again.

13. The telescope slews and "Press < until it is centered" displays. Press the Left Arrow key until the target is centered again. Then press ENTER.

14. "Train Drive: Az/RA Train" displays again. Press the Scroll Down key and "Train Drive: Alt/Dec Train" displays. Press ENTER to begin Alt/Dec. (Declination) training.

Note: Three other alignment methods, One-Star, Two-Star and Three-Star Polar alignment, are available as options in the "Setup: Align" menu. See page 51 and page 55 for more information.

Tip:

The GO TO key also allows you to perform a "spiral search." A spiral search is useful when the telescope slews to an object, but that object is not visible in the eyepiece after the telescope finishes its search. (This sometimes occurs during an alignment procedure.)

Press GO TO when the telescope stops slewing. The telescope begins to move in a spiral pattern at a very slow speed (you may change the slew speed if you wish—see SLEW SPEEDS, page 16) around the search area. Look through the eyepiece and when the object does become visible, press MODE to stop the spiral search. Then use the Arrow keys to center the object.

15. "Drive Setup: For this...." begins to scroll across the display. This is another

reminder to point your telescope at a terrestrial object. Loosen the R.A. and Dec. locks (17 and 33, Fig. 1d) and point the telescope at an object. Then re-tighten the locks. Press ENTER when the telescope is pointing at the desired terrestrial object.

16. "Center reference object" displays. Center your target object using the Arrow keys. When centered, press ENTER.

17. The telescope slews and "Press until it is centered" displays. Press the Up

Arrow key until the target is centered again. Then press ENTER.

18. The telescope slews and "Press V until it is centered" displays. Press the Down Arrow key until the target is centered again. Then press ENTER. "Train Drive: Alt/Dec Train" displays again. You have now completed this procedure. Continue onto the next procedure,

EASY ALIGNMENT.

Easy Alignment (Autostar Models Only)

After completing the "Train the Drive" procedure, align your telescope using Autostar. The fastest and easiest way to start observing with Autostar's Go To capabilities is to align your telescope using the Easy Alignment.

1. Keep pressing MODE until "Select Item: Setup" is displayed. Press ENTER.

2. "Setup: Align" displays. Press ENTER. "Align: Easy" displays. Press ENTER.

3. "German North" displays and a scrolling message prompts you to set your telescope in the polar home position. See

SETTING THE POLAR HOME POSITION, page

17, for a description of this procedure. Press ENTER after you finish the procedure.

4. Autostar then chooses two stars from its database to align upon. When the telescope slews to the star for alignment, it may not appear in the field of view in the eyepiece. Use the Arrow keys to move the telescope until the star is visible and centered in the eyepiece. The alignment star should be easily recognized and be the brightest star in the area of the sky where the telescope is pointing. See

ONE'S THE ALIGNMENT STAR, page 18, for more information. When the star is cen-

WHICH

tered, press ENTER. Repeat the procedure for the second alignment star.

Note: Autostar 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 star in the eyepiece when prompted.

Go To Saturn (Autostar Models Only)

After performing the Train the Drive and the Easy Alignment procedures, the motor drive begins operating and the telescope is aligned for a night of viewing. Objects in the eyepiece should maintain ( ing beneath the stars.

Important Note: Once aligned, only use the Autostar menus or Arrow keys to move the telescope. Do not loosen the telescope locks, or move the base manually, or alignment will be lost.

i.e., track) their position even though the Earth is rotat-

This exercise demonstrates how to select an object for viewing from Autostar’s data-

i.e., Saturn. Note that Saturn is not visible all year long and it may be necessary

base, for you to choose another object from Autostar's database. However, the procedure will be identical to the one used for observing Saturn.

1. After the telescope is aligned, “Select Item: Object” displays. Press ENTER. If “Select Item: Object” is not currently displayed, press MODE repeatedly until it displays, then press ENTER.

2. “Object: Solar System” displays. Press ENTER.

3. “Solar System: Mercury” displays. Use the Scroll Down key until “Solar System: Saturn” displays.

4. Press ENTER. “Calculating” displays. Then “Saturn” and a set of coordinates displays. Saturn’s (and other planets’) coordinates change throughout the year.

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