Celestron 80GTL Telescope User Manual


 
11
A
A
t
t
t
t
a
a
c
c
h
h
i
i
n
n
g
g
t
t
h
h
e
e
H
H
a
a
n
n
d
d
C
C
o
o
n
n
t
t
r
r
o
o
l
l
The NexStar GT hand control has a phone jack type connector at the end of its cord. Plug the phone jack connector into the outlet
at the base of the telescope’s fork arm. Push the connector into the outlet until it clicks into place and place the hand control into
its holder as described previously in the Assembly section of the manual.
P
P
o
o
w
w
e
e
r
r
i
i
n
n
g
g
t
t
h
h
e
e
N
N
e
e
x
x
S
S
t
t
a
a
r
r
The NexStar GT can be powered by the supplied battery pack or an optional 12v AC adapter. The power pack requires 8 user
supplied AA size alkaline batteries. To power the NexStar, insert the batteries into the battery pack and plug the round post into
the 12v outlet located on the side of the fork arm. Once the battery pack is plugged in, the NexStar will power on and the red
backlight on the hand control display will come on.
In case of a loss of power, the optical tube can be moved by hand. However, when powered on, the telescope should always be
controlled via the hand control. The NexStar will lose its star alignment if moved by hand when powered on.
T
T
h
h
e
e
H
H
a
a
n
n
d
d
C
C
o
o
n
n
t
t
r
r
o
o
l
l
The NexStar GT's hand controller is designed to give you instant access to all the functions the NexStar has to offer. With
automatic slewing to over 4,000 objects, and common sense menu descriptions, even a beginner can master its variety of
features in just a few observing sessions. Below is a brief description of the individual components of the NexStar GT hand
controller:
1. Liquid Crystal Display (LCD) Window: Has a dual-line, 16 character display screen that is backlit for comfortable
viewing of telescope information and scrolling text.
2. Align: Instructs the NexStar to use a selected star or object as an alignment position.
3. Direction Keys: Allows complete control of the NexStar in any direction. Use the direction keys to center objects in
the StarPointer finderscope and eyepiece.
4. Catalog Keys: The NexStar has a key on the hand control to allow direct access to each of the catalogs in its 4,000+
object database. The NexStar contains the following catalogs in its database:
Messier – Complete list of all Messier objects.
NGC – Many of the brightest deep sky objects from the Revised New General Catalog.
Caldwell – A combination of the best NGC and IC objects.
Note
Figure 3-1 – The NexStar GT Outlets
Hand Control
Outlet
Power Outlet
Battery
Pack