Bedienungsanleitung Meade ETX-90AT (Seite 20 von 60) (Englisch)

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Important Note:

While performing the

automatic tracking

procedure, only use the

Arrow keys to move the

telescope. Once the

telescope has been

aligned, do not loosen

the telescope’s vertical or

horizontal locks (

6 and 9,

Fig. 1) or move the base

manually or alignment

will be lost.

When the procedure is performed correctly, "Alignment Successful" displays. If

Autostar does not display this message, perform this procedure again.

NOTE: Autostar locates alignment stars based on the date, time and loca-

tion entered. The alignment stars may change from night to night. All that

is required is for the observer to center the selected stars in the eyepiece

when prompted.

Observe a Star using the Automatic Tracking Feature

In this example, the Autostar Arrow keys are used to find a star and then Autostar's

tracking feature automatically keeps the star centered in your

telescope's eyepiece. Make sure you have initialized and aligned your telescope

before you try out this feature (see pages 18 and 19).

1. Once you’re telescope has been aligned, “Align Successful” and then “Select Item:

Object” display. Push the Scroll Up key once and “Select Item: Setup” displays

2. Press ENTER. “Setup: Align” displays.

3. Press the Scroll Down key repeatedly until "Setup: Targets" displays. Press

ENTER.

4. "Targets: Terrestrial" displays. Press one of the Scroll keys once. "Targets:

Astronomical" now displays.

5. Use the Arrow keys (

5, Fig. 2) to locate a bright star in the night sky. Use the

viewfinder (

2, Fig. 1) to help line up on the star. You may choose any unob-

structed, bright star for the purposes of this example. Use Autostar's Arrow keys

to center the star in the eyepiece. Once the star is centered, press ENTER to

select "Astronomical." The telescope's tracking motors then engage. It may take

the tracking motors several seconds to begin tracking. When they do, it may be

necessary to once again center the star in the eyepiece. The tracking motors will

then keep the star you have chosen in the center of the eyepiece.

6. Press and hold the ENTER key for a few seconds and then release to stop track-

ing. You may repeat the procedure to locate another star or object using the

Arrow keys. Then press ENTER to re-engage the tracking motors.

Go To Saturn

After performing the Easy Align procedure, the motor drive begins operating and the

telescope is aligned for a night of viewing. Objects in the eyepiece will maintain their

position even though the Earth is rotating beneath the stars.

This exercise demonstrates how to select a celestial object, the planet Saturn, for

viewing from Autostar’s database.

NOTE: Saturn is not visible the entire year and you may need to choose

another object from Autostar's database; however, the procedure, as

described below, remains the same. If Saturn (or any other object) is not

currently visible in the sky, Autostar displays “Below Horizon.”

1. After the telescope is aligned, “Select Item: Object” displays. If “Select Item:

Object” is not displayed on your handbox, keep pressing MODE until it does dis-

play. Press ENTER.

2. “Object: Solar System” displays. Press ENTER.

3. “Solar System: Mercury” displays. Keep pressing the Scroll Down key until “Solar

System: Saturn” displays (or you may choose another object from the Solar

System list if Saturn is not visible).

4. Press ENTER. “Calculating” displays. Then “Saturn” and a set of coordinates

displays. Note that Saturn’s (and other planets’) coordinates change throughout

the year.

5. Press GO TO. “Saturn: Slewing...” displays and the telescope slews until it finds

Saturn. You may need to use the Arrow keys to center Saturn precisely in the

eyepiece. Autostar then automatically moves the telescope so that it "tracks"

Saturn (or whatever other object you may have chosen); i.e., Saturn remains

centered in the eyepiece.

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