Orion ATLAS EQ-G User Manual download pdf (Page 16)

the scroll buttons and choose the catalog of objects you wish

to view. Press ENTER to confirm your choice. Use the scroll

buttons to choose an individual object within the catalog and

press ENTER a second time to display the object’s coordinate.

Press ENTER again, and the hand controller will ask “View

Object?” Press ENTER once more to have the telescope slew

to the object.

3. Menu

You can also access the Objects Catalog through the Main

Menu. In the Main Menu, scroll down to “Object Catalog”

and press ENTER. Like the OBJECT button, this gives you

complete access to the 13,400 celestial objects in the hand

controller’s database.

Other Functions

The GoTo hand controller is equipped with a variety of addi-

tional functions that allow you to optimize performance and

access other features of the system.

Utility Functions

Utility Functions are useful tools that provide simple, yet handy,

processes to enhance your observing experience.

Show Position: Displays the coordinates (right ascension and

declination) of the location where the telescope is currently

pointing.

Display Time: Displays the local time and local sidereal time.

Park Scope: Moves the telescope to the “home” position. This

allows you to power off the Atlas EQ-G mount while saving

alignment and PEC training data. When subsequently pow-

ered on, the initial setup information must again be entered

(be sure to enter the current time accurately!), but the align-

ment procedure can be skipped.

Inquire Version: Displays the hardware, firmware, and data-

base version of the GoTo hand controller. If the hand controller

is connected to the mount, this will also display the firmware

version of the motor control board. Use the scroll buttons to

view the version numbers.

PEC Training: See Appendix B for information

LCD/LED Tuning: Allows adjustments of the LCD charac-

ter contrast, the LCD backlighting, and the LED backlighting

of the pushbuttons. Use the scroll buttons to select which of

these you wish to adjust. Use the left and right directional but-

tons to increase or decrease the value.

Setup Functions

The Setup functions allow you to change any system variable

or information regarding location, time, date, and alignment.

To access the Setup functions, either press the SETUP button

on the hand controller or scroll to “Setup Mode” from the Main

Menu using the scroll buttons and press ENTER. The different

types of functions available to you are listed below, along with

their respective purposes.

Date: Allows you to change the date entered during the initial

setup.

Time: Allows you to change the current time.

Observing site: Allows you to change the current location

(longitude and latitude) setting.

Daylight Savings: Allows you to change the Daylight Savings

option.

Alignment: Allows you to re-perform the star alignment, (see

“Alignment”).

Set Backlash: This function allows you to insert a value for

each axis to compensate for slewing backlash experienced on

that axis. Backlash is a delay in motorized motion of the mount

due to slack between gears. Backlash is experienced when the

slewing direction is reversed on one or both axes of motion.

For improved pointing accuracy, it is important the backlash

value is set to be equal or greater than the actual amount of

backlash between the gears. The default value for the backlash

compensation is 0° 10’ 0” (0 degrees, 10 arcminutes, 0 arc-

seconds). Use the numeric pushbuttons to enter the desired

backlash compensation value. First set the value for R.A. back-

lash compensation, then press ENTER to set the value for

DEC. Press ENTER again to return to the Setup Menu.

Note: Backlash compensation is only active for computerized

slewing, not for manual slewing with the directional buttons.

Set Tracking:

-Sidereal Rate: Activates tracking at sidereal rate. This is

the default tracking rate.

-Lunar Rate: Activates tracking at lunar rate.

-Solar Rate: Activates tracking at solar rate.

-PEC + Sidereal: Activates sidereal rate tracking with

Periodic Error Correction.

-Stop Tracking: Stops tracking.

Warning: Never look directly at the Sun through your tele-

scope or its finder scope, even for an instant, without a

professionally made solar filter that completely covers the

front aperture of the instrument, or permanent eye dam-

age could result. Young children should use this telescope

only with adult supervision.

Auto Guide Speed: When using an autoguider, this sets the

guiding speed to 1.125x, 1.25X, 1.5X, 1.75X, or 2X sidereal

rate.

Using the User Defined Database

The GoTo hand controller allows you to save up to 25 objects

in the User Defined database. You can save unidentifiable

objects, current comet and/or asteroid positions, or make a

custom list of your favorite objects to view.

Saving an Object to the Database

1. Press the USER button. You can also select “User Defined”

in the Object Catalog menu and then press ENTER.

2. Use the scroll buttons to select “Input Coordi.” and press

ENTER.

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Orion ATLAS EQ-G User Manual Page 16

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