Getting Started; Setting The Mount And Performing Polar Alignment; Manual Operation Of The Mount; One Star Alignment - iOptron CEM40 Instruction Manual

4. Getting Started

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In order to experience the full GOTO capability of GOTONOVA technology it is very important to set
up the mount correctly before observation.

4.1. Setting the Mount and Performing Polar Alignment

Assemble your CEM40 mount according to Section 3.1. Make sure the mount is leveled. Turn the
mount power switch on. When the GPS receiver is connected to satellites, the hand controller LCD will
display GPS OK and the mount will have the correct time and site information (this can also be entered
manually as previously described). Mount an OTA and accessories, and carefully balance the mount on
both R.A. and DEC axes. Perform the polar alignment.
After the mount is powered on, perform MENU => "Zero Position" => "Goto Zero Position" to check
the Zero Position, i.e. with the counterweight shaft pointing to ground, OTA at the highest position with
its axis parallel to the polar axis and the telescope pointing to the Celestial Pole. If the mount is not at
the Zero Position, you may perform Search Zero Position or Set Zero Position to set the Zero
Position.

4.2. Manual Operation of the Mount

The mount can now be used to observe astronomical objects using the HC. Use the arrow keys (►, ◄,
▼, and ▲) to point the telescope to the desired part of the sky. Use the number keys to change the
slewing speed. Press the STOP/0 button to start tracking.

4.3. One Star Alignment

After the mount set up, perform a "One Star Align" to correct the Zero Position discrepancy, or linear
error.
Press MENU => "Alignment" => "One Star Align" to perform "One Star Align." The hand controller
will display an alignment star. Select a different star using the ▲ or ▼ keys. Then press ENTER. After
the mount slews to the target, use the arrow keys to center it in your eyepiece. Then press ENTER.
(More details on the alignment function are given in section 5.3)

4.4. GOTO the Moon and Other Objects

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Now the mount is ready for GOTO operation which, using advanced GOTONOVA technology, will
automatically slew to, and track, a huge range of celestial targets. We will use the Moon as an example.
Press MENU => "Select and Slew". Select a category, in this example "Solar System", and then
select an object of interest, in this case "Moon". Press ENTER and the telescope will slew to the moon
and automatically start tracking. If the target is not centered in your eyepiece, use the arrow keys to
center it. Then use MENU => "Sync to Target" for better performance.

4.5. Star Identification Function

The 8407+ hand controller has a star identification function. After setting the correct local time and
location and completing polar alignment, slew the telescope to a bright star manually or using the
GOTO function. Press the Help(?) key to identify the star that the telescope is pointing to, as well as
nearby bright stars if there is any.
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