Meade LNT Instruction Manual download pdf (Page 28)

Time Zone Shift

Atlantic -4 Hours

Easter

-5 Hours

Central -6 Hours

Mountain -7 Hours

Pacific -8 Hours

Hawaii -10 Hours

Table 1: Time Zone Shift.

J Re

verse L/R:

verses the functions of the Left and Right Arrow keys (

i.e

, the Right k

moves the telescope to the left).

J Re

verse UP/DOWN:

verses the functions of the Up and Down Arrow keys (

i.e

, the Up

key moves the telescope down).

J Calibrate Sensor

This men

u allows you to improve your telescope's pointing accuracy

to alignment stars. It calibrates to correct slight mechanical misalignment due to transport,

vibration, or aging. It is recommended that calibration be performed after the LNT Module

batteries are changed (see page 54 for more information).

When this men

u is selected, the telescope slews to Polaris. AutoStar then prompts you to

center Polaris and to press ENTER. AutoStar uses the position of Polaris to fine tune the

position of North and also for detecting level.

J Quiet Slew: Sets the maximum slew rate to 1.5° for quieter operation.

J 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.

J 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°. See “OBSERVING SATELLITES,” page 32, for more information

about satellites.

J 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 AutoStar unit is

moved between telescopes, to match AutoStar to the new telescope. To calibrate the

motors, select this option and press ENTER.

J Smart Drive: Allows you to perform periodic error correction (PEC) on the R.A. worm gear

and can only be used with polar mounted telescopes. Must be

performed with a high powered reticle (eg. 9mm). PEC Training for the the LX90

telescopes will take about 8 minutes.

J High Precision: If High Precision is turned on, when looking for a faint celestial object (i.e.,

a nebula or galaxy), AutoStar first slews to a nearby bright star and displays "ENTER to

Sync." 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

iginally 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 e

epiece

If "T

errestr

ial" is selected, the tr

king motor is turned off. To learn how

to tr

k an object automatically

, see page 18.

Site provides access to several options including:

J Select: Displays the currently selected observing site. Use the Scroll keys to cycle through

all available sites (see "Add" below). Press ENTER when the site you wish to select

displa

Use this option when y

ou mo

e to a diff

erent geog

aphic location.

J 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.

J Delete: Deletes a stored site from the database.

J Edit: Edits a selected site, including: the name, latitude, longitude, and time zone. Time

Zone ref

ers to the Greenwich Mean

Time (GMT) time z

one shift. Users West of Greenwich,

England use “-” hours, East of Greenwich use “+” hours. For the United States, look up the

time zone shift in table at left.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 59 60

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Meade LNT Instruction Manual Page 28

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