Celestron skyexpedition 60, Инструкция по эксплуатации, Страница: 12 / 26

• Press ENTER to begin the search.
Note: Some of the databases contain thousands of objects,
and can therefore take a minute or two to return the
closest object.
ScoPE SEtuP FEaturES
Setup time-Site
— Allows the user to customize the hand
control display by changing time and location parameters (such
as time zone and daylight savings).
anti-backlash
— All mechanical gears have a certain amount
of backlash or play between the gears. This play is evident
by how long it takes for a star to move in the eyepiece when
the hand control arrow buttons are pressed (especially when
changing directions). The SkyExpedition’s anti-backlash features
allows the user to compensate for backlash by inputting a value
which quickly rewinds the motors just enough to eliminate
the play between gears. The amount of compensation needed
depends on the slewing rate selected; the slower the slewing
rate the longer it will take for the star to appear to move in the
eyepiece. Therefore, the anti-backlash compensation will have
to be set higher. You will need to experiment with different
values; a value between 20 and 50 is usually best for most
visual observing, whereas a higher value may be necessary
for photographic guiding. Positive backlash compensation is
applied when the mount changes its direction of movement
from backwards to forwards. Similarly, negative backlash
compensation is applied when the mount changes its direction
of movement from forwards to backwards. When tracking is
enabled, the mount will be moving in one or both axes in either
the positive or negative direction, so backlash compensation will
always be applied when a direction button is released and the
direction moved is opposite to the direction of travel.
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 directions and press ENTER after each one to save
these values. The SkyExpedition 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. The slew limits
prevent the telescope tube from slewing to an object below the
horizon or slewing to an object that is high enough that the tube
might hit one of the tripod legs. However, the slew limits can be
customized depending on your needs. For example, if you would
like to slew to an object that is close to the zenith and are certain
that the tube will not hit the tripod legs, you can set the slew
limits to 90º in altitude. This will allow the telescope to slew to
any object above the horizon without warning.
Filter Limits
— When an alignment is complete, the
SkyExpedition automatically knows which celestial objects
are above the horizon. As a result, when scrolling through the
database lists (or selecting the Tour function), the SkyExpedition
hand control will display only those objects that are known to be
above the horizon when you are observing. You can customize the
object database by selecting altitude limits that are appropriate
for your location and situation. For example, if you are observing
from a mountainous location where the horizon is partially
obscured, you can set your minimum altitude limit to read +20º.
This will make sure that the hand control only displays objects
that are higher in altitude than 20º.
If you want to explore the entire object database, set the
maximum altitude limit to 90º and the minimum limit to
–90º. This will display every object in the database lists
regardless of whether it is visible in the sky from your
location or not.
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 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
— lets the user define the direction that the
telescope will approach when slewing to an object. This 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.
cord Wrap
— 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.
utILIty FEaturES
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
— This feature is only available when using your
telescope in conjunction with the optional CN 16 GPS accessory.
Allows you to turn off the GPS module. If you want to use the
SkyExpedition 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
— 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.
Factory Setting
— Returns the SkyExpedition 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.
Version
— Selecting this option will allow you to see the
current version number of the hand control and motor 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
— Displays the relative altitude and
azimuth for the current position of the telescope.
goto axis Position
— Allows you to enter a specific altitude
and azimuth position and slew to it.
Hibernate
— Hibernate allows the SkyExpedition 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:
1. Select Hibernate from the Utility Menu.
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.
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