Sky-Watcher DOB16 - Manual (Page 15)

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SynScan
TM
AZ will beep once when it has
finished slewing to an object. Do not try to
adjust the telescope before you hear the beep.
SynScan
TM
AZ will only respond to the ESC
key while slewing.
To ensure the accuracy of the star
alignment, make sure to end the
movement with the UP or RIGHT
directional key when centering the
object in the eyepiece view.
Brightest Star Alignment
1.
2.
Once the directional division has been selected, the hand control will generate a list of the stars located
within this region that are brighter than 1.5 in magnitudes, starting from the brightest to the dimmest.
The stars and planets below 10 degrees, higher than 75 degrees in elevation or fainter than 1.4 in
magnitudes will be filtered out.
The name and magnitude of the alignment star will be displayed on the first line of the LCD. The
approximate position will be prompted on the second line. For example, if Arcturus is prompt as
alignment star, its magnitude is 0.0 and location is at 88.1 degree east and 24.1 degree above the
horizon. You will see the LCD display as shown in Fig.i.
3.
4.
Directional division Span range in azimuth
The northern sky 315 ° ~ 45 °
The northeast sky 0 ° ~ 90 °
The eastern sky 45 ° ~ 135 °
The southeast sky 90 ° ~ 180 °
The southern sky 135 ° ~ 225 °
The southwest sky 180 ° ~ 270 °
The western sky 225 ° ~ 315 °
The northwest sky 270 ° ~ 360 °
Find a visible single bright star that is far apart from any object in the sky. Point the telescope roughly
to the star.
In the alignment screen, select Brightest-Star Align using the scroll keys. Press ENTER to confirm. The
hand control will prompt "Select Region:" for you to select one of the eight directional divisions in
azimuth angle from the north, northeast, east, southeast to northwest etc. Select the region where the
chosen star is located and press ENTER.
Each division covers 90-degree span in azimuth. The table below explains the range of the eight
directional divisions.
This alignment method is the most suitable if you are unfamiliar with the night sky, or are unsure of the name
of the brighter stars.
1. Arcturus 0.0
E 88.1° 24.1°
For the first alignment star, the mount will not slew to the star auto-
matically. Use the directional buttons to manually slew the telescope
to point to the object in the finder and then center it in the eyepiece.
You may change the slewing speed by pressing the RATE button,
and then choose a number between 0 (slowest) - 9 (fastest). You will
find that Rate 4 may be best suited for centering the object in the
finderscope and Rate 3 or less for centering in the eyepiece view.
Once the star has been centered in the eyepiece, if it is a planet the hand control will prompt you to rese-
lect a star from the list as the first alignment star. Otherwise the hand control will prompt a list of objects
for you to choose as the second alignment star. Select an object from the list. The hand control will com-
mand the mount to slew the telescope to point to the star. If you see multiple objects in the eyepiece
view, the chosen star should be the brightest among all. Center the star in the eyepiece again. If both
alignment stars are properly aligned, "Alignment Successful" will display on the LCD. Otherwise, the
warning "Alignment Failed" will show and the alignment will have to be done again. You may exit the
alignment procedure by pressing the ESC key anytime during the procedure.
Fig.i
6.
5.
The slewing speed can be
adjusted by pressing on the
RATE button. Then choose a
number between 0 (slowest) - 9
(fastest).