Vixen STARBOOK-S - Manual (Page 37)

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(3) Center your target celestial object in the field of view of the telescope, and then press the RA+
key to verify how the object moves in the field of view.
*It may not move immediately as you press the RA+ key. Continue pressing the key until it
starts moving.
(4) Press the R.A.- key to verify how it moves in the field of view.
If there is a time delay before the object start moving when you press the key, it indicates that the
amount of backlash compensation in the R.A. is too small. On the contrary, if the object moves
quickly and extensively as you press the key, it shows the amount of the backlash compensation
in the R.A. is too large.
(5) Next, press the DEC+ key and press the DEC- key in turn to verify how the object moves in
the field of view.
Setting the backlash compensation
(1) Press Menu to display the System Menu on the screen. Move the cursor to Backlash
Compensation with the keys and press Select to enter.
(2) The default values for backlash compensation are set to 0 both in R.A. and DEC.. Move the
cursor with the
keys and select your setting preference with the Value+, Value- keys.
The values can be set between 0 and 100 both in R.A and DEC..
(3) Choose OK and press Select to enter.
Save the settings in order for the current settings to apply the next time the STARBOOK-S is
used.
MrStarGuy,
Inc.