Celestron 11074-XLT, Instruction Manual

Page: 20 / 61

20
R
R
a
a
t
t
e
e
B
B
u
u
t
t
t
t
o
o
n
n
Pressing the RATE key (11) allows you to instantly change the speed rate of the motors from high speed slew rate to precise guiding rate
or anywhere in between. Each rate corresponds to a number on the hand controller key pad. The number 9 is the fastest rate (3º per
second, depending on power source) and is used for slewing between objects and locating alignment stars. The number 1 on the hand
control is the slowest rate (.5x sidereal) and can be used for accurate centering of objects in the eyepiece and photographic guiding. To
change the speed rate of the motors:
• Press the RATE key on the hand control. The LCD will display the current speed rate.
• Press the number on the hand control that corresponds to the desired speed. The number will appear in the upper-right corner of the
LCD display to indicate that the rate has been changed.
The hand control has a "double button" feature that allows you to instantly speed up the motors without having to choose a speed rate.
To use this feature, simply press the arrow button that corresponds to the direction that you want to move the telescope. While holding
that button down, press the opposite directional button. This will increase the slew rate to the maximum slew rate.
When pressing the Up and Down arrow buttons in the slower slew rates (6 and lower) the motors will move the telescope in the opposite
direction than the faster slew rates (7 thru 9). This is done so that an object will move in the appropriate direction when looking into the
eyepiece (i.e. pressing the Up arrow button will move the star up in the field of view of the eyepiece). However, if any of the slower
slew rates (rate 6 and below) are used to center an object in the finderscope, you may need to press the opposite directional button to
make the telescope move in the correct direction.
1 = .5x* 6 = 64x
2 = 1x (sidereal)* 7 = .5º / sec
3 = 4x 8 = 2º / sec
4 = 8x 9 = 3º / sec
5 = 16x
*Rate 1 and 2 are photographic guide rates and are meant to be used when the telescope is set up on a wedge in equatorial mode. These
rates can be used while set up in altazimuth, however the actual speed rate may differ slightly.
S
S
e
e
t
t
u
u
p
p
P
P
r
r
o
o
c
c
e
e
d
d
u
u
r
r
e
e
s
s
The CPC contains many user defined setup functions designed to give the user control over the telescope's many advanced features.
All of the setup and utility features can be accessed by pressing the MENU key and scrolling through the options:
Tracking Mode This allows you to change the way the telescope tracks depending on the type of mount being used to support the
telescope. The CPC has three different tracking modes:
Alt AZ
This is the default tracking rate and is used when the telescope is placed on a
flat surface or tripod without the use of an equatorial wedge. The telescope
must be aligned with two stars before it can track in altazimuth (Alt-Az).
EQ North
Used to track the sky when the telescope is polar aligned using an equatorial
wedge in the Northern Hemisphere.
EQ South Used to track the sky when the telescope is polar aligned using an equatorial
wedge in the Southern Hemisphere.
OFF When using the telescope for terrestrial (land) observation, the tracking can
be turned off so that the telescope never moves.
Tracking Rate In addition to being able to move the telescope with the hand control buttons, the CPC will continually track a
celestial object as it moves across the night sky. The tracking rate can be changed depending on what type of
object is being observed:
Nine available slew speeds