Meade ETX-90AT Telescope User Manual


 
56
Train the telescope motors using Autostar. Perform this procedure if you are experiencing any pointing accuracy problems. Fig.
52
depicts the complete Drive Training procedure.
Note: Use a terrestrial object, such as a telephone pole or lamp post, to train the drive. Complete this exercise once
every 3 to 6 months to maintain the highest level of telescope pointing accuracy.
Fig. 52: Training the Drive Procedure.
Press > until it
is centered
Press < until it
is centered
Train Drive
Az. Train
Train Drive
Alt. Train
Drive Setup
For this op. . .
Center reference
object
ENTER
ENTER
ENTER
ENTER
Scope slews left.
Bring target back
to center using
the Right Arrow key.
12
13
14
15
16
17
Scope slews right.
Bring target back
to center using
the Left Arrow key.
Menu returns to
Az. training.
Altitude
(vertical)
training.
Reminder to 
use terrestrial
target.
Train Drive
Az. Train
Select Item
Object
Press until it
is centered
Press until it
is centered
ENTER
ENTER
MODE
18
19
20
21
Center target
using Arrow
keys.
Scope slews down.
Bring target back
to center using
the Up Arrow key.
Scope slews up.
Bring target back
to center using
the Down Arrow key.
Multiple presses.
ENTER
Select Item
Object
Select Item
Setup
Setup
Align
Setup
Telescope
3
4
6
ENTER
Press the scroll 
up key once.
Access the Setup
menu.
Multiple presses.
Access the 
Telescope menu.
5
ENTER
1
Telescope
Telescope Model
Telescope
Train Drive
Train Drive
Az. Train
Drive Setup
For this op. . .
Center reference
object.
ENTER
ENTER
ENTER
Multiple presses.
Choose the Train
Drive option.
Azimuth 
(horizontal)
training.
7
8
9
10
11
Reminder to 
use terrestrial
target.
Center target
using Arrow
keys.
ENTER
Verify that AUTOSTAR 
INITIALIZATION is 
complete.
Press MODE until 
Select Item is displayed.
1
2
>
>
APPENDIX C: TRAINING THE DRIVE
Further Study....
This manual gives only the briefest introduction to astronomy. If
you are interested in pursuing further studies in astronomy, a
few topics are suggested below that are worth reading up on
(some of the topics are easy and some are quite challenging).
Try looking up some of these in the Autostar glossary.
Also included below is a small sampling of books, magazines
and organizations that you might find helpful.
Topics
1. How is a star born? How does a solar system form?
2. How is the distance to a star measured? What is a light
year? What is red shift and blue shift?
3. How are the craters on our Moon formed? Is there water
under the surface of the Moon?
4.
What is a black hole? A neutron star? A quark star? A
gamma burster? An Einstein lens?
5. What are stars made of? Why are stars different colors?
How is the elemental composition of a star determined?
What is an Lyman Alpha forest?
6. What is the difference between a Type 1 and a Type II
supernova?
7. What is the importance of studying the composition of
comets? Where do comets come from?
8. How old is our Sun? Will our Sun evolve into a planetary
nebula or go supernova?
9. What is the Inflationary Big Bang? What is dark matter?
What are MACHO's?
10. How are extrasolar planets discovered? What is an accre-
tion (or protoplanetary) disk?
11. What are the differences between elliptical, spiral and irreg-
ular galaxies? Can globular clusters be older than the uni-
verse itself?
Books
1. The Guide to Amateur Astronomy by Jack Newton and
Philip Teece
2. The Sky:
A User’s Guide by David Levy
3.
Turn Left at Orion by Guy Consolmagno & Dan Davis
4. Astrophotography for the Amateur by Michael Covington
Magazines
1. Sky & Telescope
Box 9111, Belmont, MA 02178
2. Astronomy
Box 1612, Waukesha, WI 53187
Organizations:
1. Astronomical League
Executive Secretary
5675 Real del Norte, Las Cruces, NM 88012
2. The Astronomical Society of the Pacific
390 Ashton Ave., San Francisco, CA 94112
3. The Planetary Society
65 North Catalina Ave, Pasadena, CA 91106
And watch Jack Horkheimer,
Star Gazer, on your local PBS
station. Visit Jack’s website at: www.jackstargazer.com
ETX TIPS