Goto Approach; Cordwrap; Utility Features; Gps On/Off - Celestron NexStar 90 MAK Instruction Manual

Direction Buttons

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 buttons (left and right) or Altitude buttons (up and down) 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).

Goto Approach

allows the user the ability to minimize the effects of backlash For example, if your telescope is back heavy from using
heavy optical or photographic accessories attached to the back, you would want to set your altitude approach to the
negative direction. This would ensure that the telescope always approaches an object from the opposite direction as
the load pulling on the scope.
To change the goto approach direction, simply choose Goto Approach from the Scope Setup menu, select either
Altitude or Azimuth approach, choose positive or negative and press Enter.

Cordwrap

– Cord wrap safeguards against the telescope slewing more than 360º in azimuth and wrapping accessory
cables around the base of the telescope. This is useful any time that the telescope is powered using an external power
supply. By default, the cord wrap feature is turned off when the telescope is aligned in altazimuth and turn on when
aligned on a wedge.
U t i l i t y F e
U t i l i t y F e
Scrolling through the MENU options will also provide access to several advanced utility functions such as anti-
backlash compensation and slew limits.

GPS On/Off

GPS accessory. Allows you to turn off the GPS module. 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.

Light Control

conserve power and to help preserve your night vision.

Factory Setting

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.

Version

– Selecting
control software. The first set of numbers indicate the hand control software version. For the motor control, the hand
control will display two sets of numbers; the first numbers are for azimuth and the second set are for altitude.

Get Axis Position

Goto Axis Position

Hibernate

– Hibernate allows the NexStar to be completely powered down and still retain its alignment when turned
back on. This not only saves power, but is ideal for those that have their telescopes permanently mounted or leave
their telescope in one location for long periods of time. To place your telescope in Hibernate mode:
H H e e l l p p f f u u l l
1. Select Hibernate from the Utility Menu.
H H i i n n t t
2. Move the telescope to a desire position and press ENTER.
3. Power off the telescope. Remember to never move your telescope manually while in Hibernate mode.
Once the telescope is powered on again the display will read Wake Up. After pressing Enter you have the option of
scrolling through the time/site information to confirm the current setting. Press ENTER to wake up the telescope.
Pressing UNDO at the Wake Up screen allows you to explore many of the features of the hand control without
waking the telescope up from hibernate mode. To wake up the telescope after UNDO has been pressed, select
Hibernate from the Utility menu and press ENTER. Do not use the direction buttons to move the telescope while in
hibernate mode.
– The direction a star moves in the eyepiece varies depending on the accessories being used.
– lets the user define the direction that the telescope will approach when slewing to an object. This
a t u r e s
a t u r e s
– This feature is only available when using your telescope in conjunction with the optional CN 16
– This feature allows you to turn off both the red key pad light and LCD display for daytime use to
– Returns the NexStar hand control to its original factory setting. Parameters such as backlash
this option will allow you to see the current version number of the hand control and motor
– Displays the relative altitude and azimuth for the current position of the telescope.
– Allows you to enter a specific altitude and azimuth position and slew to it.
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