Meade Instruments LX90-GPS - Manual (Page 39)

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Two-Star alt/az alignment procedures, you will (unlike the Automatic and Easy alignment pro-
cedures) manually place the telescope in the home position.
The procedures for equatorial (polar) alignment are discussed in APPENDIX A , page 50; the
three alternative alt/az alignment methods are discussed below.
Easy (Two-Star) Alignment
In this method, AutoStar automatically sets the home position, and also automatically picks two
stars from its libraries for alignment. During the procedure, AutoStar slews the telescope to a
first alignment star. The user is asked to verify that the telescope is pointed at the chosen star
and then prompted to center the star in the eyepiece. The process is repeated with a second
star to complete the alignment.
How to perform the Easy Align Procedure
1.
Select Alignment. Select "Align: Easy" from the Setup menu. Press ENTER.
2. Home Position. The telescope automatically sets the following positions: home, level,
North, and True North. If so desired, you may turn off the sensors and manually set these
positions. See
CALIBRATE SENSORS , page 29 for more information.
3 . Star Alignment. AutoStar 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 23, for some important tips
concerning alignments stars and using your viewfinder.
When the procedure is performed correctly, "Alignment Successful" displays. If AutoStar
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 provides a library of
bright stars and two stars from this library are chosen
by the observer for alignment. In this
procedure, AutoStar does not automatically find home, level, or North.
1. Select Alignment. Select "Align: Two Star" from the Setup menu. Press ENTER.
3. Set Home Position. Place the telescope in the home position.
To Set the Home Position Manually:
a. See Fig. 14. Loosen the telescope’s Dec. lock (6, Fig. 1). Set the optical tube to 0° on
the Dec. setting circle ( 11, Fig. 1).
b. Tighten the Dec. lock ( 6, 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 ( 9, Fig. 1) and turn the telescope's optical tube horizontally until
it points North.
f. Re-lock the R.A. lock ( 9, Fig. 1). Press ENTER.
g. Press ENTER.
4 . Star Alignment. "Select Star" displays. AutoStar 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.
6. Center Star. Repeat procedure for a second alignment star. Once ENTER is pressed, the
telescope is aligned and you are now ready to use AutoStar's GO TO capabilities for a
night of observing.
Fig. 14: Alt/Az Home Position.
North
0°
Looking at or near the Sun will cause irreversable damage to your eye. Do not point this telescope at or near the
Sun. Do not look through the telescope as it is moving.