Celestron NexStar 11, Инструкция по эксплуатации

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To set the anti-backlash value, scroll down to the anti-backlash option and press ENTER. Enter a value from 0-100 for both
azimuth and altitude and press ENTER after each one to save these values. NexStar will remember these values and use them
each time it is turned on until they are changed.
Slew Limits –
Sets the limits in altitude that the telescope can slew without displaying a warning message. By default the
slew limits are set to 0º to 90º and will only display a warning message if an object is below the horizon. However, the slew
limits can be customized depending on your needs. For example, if you have certain photographic accessories attached to your
telescope preventing it from pointing straight-up, you can set the maximum altitude limit to read 80º, thus preventing the
telescope from pointing to any objects that are greater than 80º in altitude without warning.
Calibrate Motors
- Calibrate Motors compensates for different load levels on the motors and gears when set up in different
configurations and in different parts of the sky. This helps the NexStar determine which speed rate to send to the motors when a
particular direction button is pressed. The NexStar motors have been calibrated at the factory, but the motors should be re-
calibrated when used on an equatorial wedge or whenever additional weight is added to the tube.
Motor calibration is most
effective when calibrating in the particular part of the sky that you wish to observe or photograph. To calibrate the motors, point
the telescope to the region of sky you plan on observing or photographing and select
Calibrate Motors from the Utilities menu.
Even if Calibrate Motor is not used, the NexStar software will eventually train itself to automatically compensate for different
load levels.
Periodic Error Correction (PEC)
- PEC is designed to improve photographic quality by reducing the amplitude of the
worm gear errors and improving the tracking accuracy of the drive. This feature is for advanced astrophotography and is used
when your telescope is polar aligned with the optional equatorial wedge. For more information on using PEC, see the section on
“Celestial Photography”.
Direction Buttons –
The direction a star moves in the eyepiece varies depending on the accessories being used. This can
create confusion when guiding on a star using an off-axis guider versus a straight through guide scope. To compensate for this,
the direction of the drive control keys can be changed. To reverse the button logic of the hand control, press the MENU button
and select
Direction Buttons from the Utilities menu. Use the Up/Down arrow keys (10) to select either the azimuth (left and
right) or altitude (up and down) button direction and press ENTER. Pressing ENTER again will reverse the direction of the hand
control buttons from their current state. Direction Buttons will only change the eyepiece rates (rate 1-6) and will not affect the
slew rates (rate 7-9).
Calibrate Level
– This utility function calibrates the internal downstop switch in the fork arm with the actual position of the
optical tube. This downstop position is then stored and used to assist in polar alignment when EQ North (or South) Alignment is
selected. An Alt-Az alignment is required before the downstop can be calibrated. See
Polar Alignment section in the Astronomy
Basics chapter of the manual for more details on using Calibrate Level .
Light Control
– This feature allows you to turn off both the red key pad light and LCD display for daytime use to conserve
power and to help preserve your night vision.
GPS On/Off
-
Allows you to turn off the GPS module. When aligning the telescope using AutoAlign, the NexStar still
receives information, such as current time, from the GPS. If you want to use the NexStar database to find the coordinates of a
celestial object for a future date you would need to turn the GPS module off in order to manually enter a date and time other than
the present.
Factory Setting
– Returns the NexStar hand control to its original factory setting. Parameters such as backlash compensation
values, initial date and time, longitude/latitude along with slew and filter limits will be reset. However, stored parameters such as
PEC and user defined objects will remain saved even when
Factory Settings is selected. The hand control will ask you to press
the "0" key before returning to the factory default setting.