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a value near 0, it takes longer for the tube to
respond as you hold down an Arrow key and
also slews the tube more slowly. Experiment
with this option. Try changing the percent value
until you get a "feel" for the Arrow keys that is
comfortable for you.
• Alt Percent: The Alt (Altitude) Percent operates
identical to the Az Percent option (see above),
but allows you to change the altitude backlash,
i.e., the way the Arrow keys move the telescope
when moving along the altitude (vertical) axis.
• Train Drive: Trains the Altitude and Azimuth
motors to locate objects with more precision.
If you are experiencing any problems with
pointing
accuracy,
described in APPENDIX C: TRAINING THE
DRIVE, page 49. to insure accurate pointing
and tracking.
• Tracking Rate: Changes the speed at which
the telescope tracks targets in the sky.
A. Sidereal: The default setting for AudioStar;
sidereal rate is the standard rate at which stars
move from East to West across the sky due to
the rotation of the Earth.
B. Lunar: Choose this option to properly track the
Moon over long observing sessions.
C. Custom:
rates.
• Reverse L/R reverses the functions of the Left
and Right Arrow keys (i.e., the Right key moves
the telescope to the left).
• Reverse UP/DOWN reverses the functions of
the Up and Down Arrow keys (i.e., the Up key
moves the telescope down).
• Quiet Slew sets the maximum slew rate to 1.5°
for quieter operation.
• Max Elevation allows you to enter a value in
degrees that sets a limit as to how far the optical
tube can swing upward during a programmed
slew. (Note that it does not prevent you from
performing a manual slew past this limit.) This
is useful when you have a camera or other
peripheral attached to the telescope—you can
prevent it from striking the telescope base.
follow
the
procedure
• Min AOS (Acquisition of Signal) allows you
enter a value in degrees. This value represents
the altitude at which your telescope begins to
slew when acquiring a satellite track. This is
useful when you are observing satellites, but a
tall tree or building is obstructing the telescope.
For example, you might begin to track the
satellite at 15° altitude, instead of 5°.
• Calibrate Motor if the telescope motors appear
to have a problem, use this option to retest the
motors before performing a Reset. This option
is also used if an AudioStar unit is moved
between telescopes, to match AudioStar to the
new telescope. To calibrate the motors, select
this option and press ENTER.
• High Precision if turned on, when looking for
a faint celestial object (i.e., a nebula or galaxy),
and displays "Center (Star name) Press Enter".
Center the star in the eyepiece, then press
ENTER. At that point the telescope has a high
precision alignment to that part of the sky and
it then slews to the object that was originally
requested.
Targets switches between Astronomical targets and
Terrestrial targets. If "Astronomical" is selected, the
telescope tracking motor is activated and any object
you observe will remain centered in the eyepiece.
If "Terrestrial" is selected, the tracking motor is
turned off.
Site provides access to several options including:
• Select:
Displays
observing site. Use the Scroll keys to cycle
through all available sites (see Add below).
Press ENTER when the site you wish to select
displays. Use this option when you move to a
different geographic location.
• Add: Allows you to add new observing sites to
the database (up to six sites may be stored).
Scroll through the list of Countries/States.
Press ENTER when the site you wish to add
displays. Then choose the desired city in the
same manner.
32
the
currently
selected
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