Sky-Watcher SynScan V4 Hand Controller User Manual

Page 35

PART XI : ADVANCED FUNCTIONS

The SynScan hand control divides the sky into 85 small zones, and users can calibrate the

pointing error for each of these zones. The next time that the SynScan controller tries to

locate an object in the calibrated zone (or a zone nearby), it will automatically apply the re-

corded calibration data to compensate the pointing error.
This function is useful for locating faint deep sky objects, and it is also helpful for obtaining
consistent pointing accuracy for a permanent observatory.

Here are the instructions on using the PAE function:

Perform a 1-star alignment, 2-star alignment, or a 3-star alignment.

Choose a celestial object in a zone of interest as reference by referring to a sky map or

planetarium software. In general, it is a rather bright star, but users can also use other

objects. Use the SynScan hand control to control the mount to point the telescope to the

reference object.

Use one of the following operations to start the PAE calibration:

• Press the “

UTILITY

” shortcut key, access to sub-menu “

PAE\PAE Correction

”, and then

press the

ENTER

key.

• Press and hold the

ESC

key for two seconds.

The screen will display “

Re-centering Obj.:

” in the first row, and display the name of the

reference object in the bottom row. (If the last object is launched from a PC, then instead

of the name of the reference object, it will display “

The last target

”.) Now use the direction

keys of the hand control to center the object in the telescope’s FOV, and then press

EN-

TER

to confirm. Remember to end the centering operation by pressing the

Right

and

direction keys together.

Repeat

Step 2

for viewing different portions of the sky.

Note:
• Whenever the SynScan hand control locates an object, it will automatically check whether

a PAE calibration data is available, and apply the compensation accordingly. No manual

intervention is required.

• If multiply PAE calibration is performed in the same zone, the previous calibration data

will be overwritten.

• Users can access the menu “

UTILITY FUNCTION > PAE > Clear PAE data

” to clear all PAE

calibration data.

• The PAE calibration data will be automatically cleared after a

1-star alignment, 2-star

alignment or 3-star alignment.