iOptron IEQ75-GTTM Telescope User Manual


 
20
between “behind” and “ahead”. When the number is correct, press ENTER and go back to the previous
screen.
For other parts of the world you can find your “time zone” information from iOptron website
(http://www.ioptron.com/support.cfm?module=faq#). DO NOT COUNT DAYLIGHT SAVING TIME.
The time and site information will be stored inside the HC memory chip. If you are not traveling to
another observation site, they do not need to be changed.
4.3.3. Set N/S Hemisphere
If the polar axis is aligned to North Celestial Pole, then set the mount to Northern Hemisphere. If the
polar axis is pointing to South Celestial pole, set the mount to Southern Hemisphere.
Press Enter.
Select North Hemisphere if you are located in US and press ENTER to go back to the previous
screen.
4.3.4. Initial Star Alignment
A simple star alignment/synchronization can be performed to improve the GOTO accuracy.
To perform “One Star Align,” press MENU button, scroll down to “Align”, select “One Star Align
and press ENTER. The screen will display a list of bright objects for you to select from. Select an object
using or key. Then press ENTER. After the mount slews to the target, use the arrow keys to center it
in your eyepiece. Then press ENTER. (More align details in 5.6)
An alternate way is to perform “Sync to Target.” Press the MENU button, select “Select and Slew
and press ENTER. Browse over the catalogs and select an object, such as “StarsÆNamed starsÆ140
(Polaris), and press ENTER. After the mount slews to Polaris, press the MENU button, scroll down to
Sync. To Target”, follow the on-screen instruction to center Polaris and press ENTER. You may need to
use the number keys to change the slewing speed to make the centering procedure easier.
4.3.5. Go to the Moon
After performing these set-ups the mount is ready to GOTO and track objects. One of the most
common objects is the Moon.
To slew to the Moon press the MENU button. Select “Select and Slew” by pressing the ENTER
button. Select “Planets, Sun, Moon”, and use the or buttons to select Moon. Press ENTER. The
telescope will automatically slew to the Moon and lock on it. It will automatically begin to track once it locks
on. If the Moon is not centered in your eyepiece, use the arrow keys to center the Moon. Or for better
performance use “Sync to Target.”
Set up Local Time
Set up Observ. site
Set N/S hemisphere
Set display contrast
Set Eyepiece light
Set Backlight
Set anti-backlash
Set Key Beep
North hemisphere
South hemisphere