22
desired object is centered in the eyepiece, simply scroll to the "
Save Sky Obj"
Save Sky Obj"
Save Sky Obj"
Save Sky Obj"
command and
press ENTER. The display will ask you to enter a number between 1-25 to identify the object.
Press ENTER again to save this object to the database.
Save Land Object
:
The NexStar can also be used as a spotting scope on terrestrial objects. Fixed land objects can be
stored by saving their altitude and azimuth relative to the location of the telescope at the time of
observing. Since these objects are relative to the location of the telescope, they are only valid for
that exact location. To save land objects, once again center the desired object in the eyepiece.
Scroll down to the "
Save Land Obj
Save Land Obj
Save Land Obj
Save Land Obj
" command and press ENTER. The display will ask you to
enter a number between 1-25 to identify the object. Press ENTER again to save this object to the
database.
Enter R.A. - Dec:
You can also store a specific set of coordinates for an object just by entering the R.A. and
declination for that object. Scroll to the "
Enter RA
Enter RA
Enter RA
Enter RA-
-
-
-DEC "
DEC "
DEC "
DEC "
command and press ENTER. The
display will then ask you to enter first the R.A. and then the declination of the desired object.
GoTo Object:
To go to any of the user defined objects stored in the database, scroll down to either
GoTo Sky
GoTo Sky
GoTo Sky
GoTo Sky
Obj
Obj
Obj
Obj
or
Goto Land
Goto Land
Goto Land
Goto Land Obj
Obj
Obj
Obj
and enter the number of the object you wish to select and press
ENTER. NexStar will automatically retrieve and display the coordinates before slewing to the
object.
To replace the contents of any of the user defined objects, simply save a new object using one
of the existing identification numbers; NexStar will replace the previous user defined object
with the current one.
Get RA/DEC
- Displays the right ascension and declination for the current position of the
telescope.
Get Alt-Az
- Displays the relative altitude and azimuth for the current position of the
telescope.
Goto R.A/ Dec
- Allows you to input a specific R.A. and declination and slew to it.
Goto Alt-Az
- Allows you to enter a specific altitude and azimuth position and slew to it.
To store a set of coordinates (R.A./Dec) permanently into the NexStar database, save it as a
User Defined Object
as described above.
U
U
U
U
U
U
U
U
tttt
tttt
iiii
iiii
llll
llll
iiii
iiii
tttt
tttt
y
y
y
y
y
y
y
y
F
F
F
F
F
F
F
F
e
e
e
e
e
e
e
e
a
a
a
a
a
a
a
a
tttt
tttt
u
u
u
u
u
u
u
u
rrrr
rrrr
e
e
e
e
e
e
e
e
s
s
s
s
s
s
s
s
Scrolling through the MENU (9) options will also provide access to several advanced utility
functions within the NexStar such as; Periodic Error Correction , Anti-Backlash and Calibrate
Level.
Anti-backlash
– All mechanical gears have a certain amount of backlash or play between
the gears. This play is evident by how long it takes for a star to move in the eyepiece when the
hand control arrow buttons are pressed (especially when changing directions). The NexStar's
anti-backlash features allows the user to compensate for backlash by inputting a value which
quickly rewinds the motors just enough to eliminate the play between gears. The amount of
compensation needed depends on the slewing rate selected; the slower the slewing rate the
longer it will take for the star to appear to move in the eyepiece. Therefore, the anti-backlash
compensation will have to be set higher. You will need to experiment with different values; a
value between 20 and 50 is usually best for most visual observing, whereas a higher value may
be necessary for photographic guiding.
Helpful
Hint
A Z M P O S IT IV E
A Z M N E G A T IV E
A L T P O S IT IV E
A L T N E G A T IV E
AN T I-BAC K LAS H
S L E W A L T M A X
S L E W A L T M IN
S LE W LIM IT S
CALIBRAT E M OT ORS
P L A Y B A C K
R E C O R D
PE C
A Z M
B U T T O N S
A L T
B U T T O N S
DIR E CT ION BU T T ON S
N O A L IG N M E N T
P R E S S E N T E R
CALIBRAT E LE V E L
D IS P L A Y O F F
D IS P L A Y O N
K E Y P A D O F F
K E Y P A D O N
LIG H T C ONT R OL
G P S O N
G P S O F F
G PS ON /OFF
P R E S S U N D O
P R E S S "0 "
FAC T OR Y S E T T IN G
U T ILIT IE S
M E NU
Содержание NexStar 11
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