Part Iv : Synscan Menu Tree; Menu Structure - SKY-WATCHER NEQ3 Instruction Manual

Telescopes with neq3 & eq5 mount

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Instruction manual (27 pages)

Table of Contents

Enlarged version

PART III : ALIGNMENT

Equatorial Mount with 2-Star Alignment:

Advantage: For visual observing, the mount does not need to be polar-aligned accurately.

Preconditions: Small cone error in the telescope-mount setup.

Rules for choosing alignment stars:

•

The deviation in R.A. of the two alignment stars should not be too small or too close

to 12 hours; the recommended deviation is between 3 hours and 9 hours.

•

If there is cone error in the telescope-mount setup or if users are not sure about it,

it is recommended to choose two alignment stars that are on the same side of the

meridian. The absolute values of the two alignment stars' declination should better

deviate between 10 to 30 degrees.

Note: If the polar alignment of the mount is good, it is not necessary to choose "

alignment

" to align the mount, use the "

Equatorial Mount with 3-Star Alignment:

Advantages:

•

Good pointing accuracy; even when the telescope-mount system has cone error.

•

For visual observing, the mount does not need to be accurately polar-aligned.

Preconditions: The skies of both sides of the meridian are clear of obstructions.

Rules for choosing alignment stars:

•

The 3 alignment stars should be spread out on both sides of the meridian.

•

For the two alignment star on the same side of the meridian, the deviation in their

R.A. should be greater than 3 hours, and the absolute value of the difference of the

two alignment stars' declination should be between 10 to 30 degrees.

( 10° < |Dec1 – Dec2| < 30°)

•

If there is cone error in the telescope-mount setup or users are not sure about it,

avoid the situation that all 3 alignment stars have small declination (close to the ce-

lestial equator).

Note: If users are sure that there is no (or very small) cone error in the telescope-mount

system, then it is not necessary to choose the "

1-star alignment

" or "

2-star alignment

Alt-azimuth Mount:

Brightest Star Alignment

The "

" is designed for entry level users who cannot identify stars in

the night sky, and the "

2-Star alignment

the night sky. Both alignment methods provide the same level of precision.

Rules for choosing alignment stars:

•

It is recommended that the altitude of the two alignment stars are between 15 and 60

degrees and the deviation of altitude is between 10 and 30 degrees.

•

The azimuth deviation of the two alignment stars can be between 45 and 135 de-

grees, it is best to be close to 90 degrees.

1-star alignment

" instead.

3-star alignment

" to align the mount. Use

" instead.

" is for users who know the names of the stars in

4.1 Menu Structure

The SynScan hand control uses menu tree to organize its various functions. The following

table shows the menu tree:

SETUP MODE

Date

Time

Observ. Site

2-Star

Daylight Saving

Alignment

1-Star Align.

2-Star Align.

3-Star Align.

Brightest Star ^

Polar Align.

Alignment Stars

Set Star Name

Adv. Filter

Sort By

Backlash

Tracking

Auto Guide Speed

Elevation Limit

Auxiliary. Encoder

Sync. Encoder

Handset Setting

Factory Setting

Note:

# Applicable to Equatorial mounts

^ Applicable to Alt-azimuth mounts

Only available after 2-star or 3-star alignment is performed

+ Applicable only to certain types of mounts and motor controllers.