The
first time setup for the Celestron NexStar GPS series should be done in
the following steps.
Set the scope outside
in an area where it will have full access to the sky - no tall
buildings, thick trees, etc. really close to the scope. Loosen the ALT
and AZIMUTH locks and position the telescope tube vertically with the
eyepiece end pointing straight up - just like it came in the box. Now
lock it down. Make SURE the ALT and AZIMUTH locks are engaged ALL the
way.
Turn the scope on. It
should say "Nexstar GPS". Press "Enter" to select
GPS Alignment. At this point the telescope should start moving around
looking to point North and level itself horizontally. Once it stops
moving it should be pointing pretty close to the North. Verify this from
your own personal experience. Mine was off by a quite a bit the first
time. After a few seconds, it will move to somewhere near the first
alignment star and tell you its name. If you live in a relatively light
polluted area like I do, and the telescope is not pointing at a tree or
a building, you should see a star much brighter than the rest in the
general vicinity where the scope is pointed. Also, if you set up just as
it's getting dark, only the brighter stars should be visible - and these
are the ones the scope uses.
If you want to verify
the star, the back of the manual has reference sky charts with the
alignment stars circled. On page 67 is the one for March - April. Notice
East and West are reversed in relation to North. This is normal because
the charts assume that you're looking up :). Put it over your head and
align it roughly to the north and you'll see East in the right
direction.
Now use the cursor
controls and center the star in the finder. Press "Enter". Now
CAREFULLY center the star in the eyepiece and press "Align".
You want to be really accurate this first time so take your time and do
it right. The scope will do the same thing for the second alignment
star. Repeat the process above. If everything goes right it will then
say - Alignment Successful.
The first time around
my scope was off by quite a bit on all this stuff. That's normal until
you calibrate the compass and the level. Next, and this is the important
part, press Undo until the readout says Nexstar GPS. Press Menu. Use the
Scroll keys (#s 6 and 9 on the keypad) and find Utilities. Press Enter.
Scroll again and find Compass. Press Enter. Scroll and find calibrate.
Press Enter. Press Undo to go back to the Utilities menu. Scroll and
find Alt Sensor. Press Enter. Scroll to Calibrate. Press Enter.
If you were really
careful on your star alignment you scope is now very well calibrated for
your magnetic deviation and level and should point very accurately from
now on. Look at your tripod and find the word Celestron on the spreader
between the legs. Remember where it's pointing and set it up the same
way the next time. The next time you power up the alignment stars should
be in the finder or really close (less than a finder's width away.