Vixen Sphinx SXP - Manual (Page 75)

Power Source
Power Source Power Source
Power Source
Main Scope
Guide Scope
STAR BOOK TEN
(D)SLR Camera
External Autoguider
Monitor
CCD Video Camera
Chapter 5 APPLICATION
AutoGuide
1
2
3
The STAR BOOK TEN can be used for auto guiding in conjunction with a CCD video camera installed on a guide scope and a built-in
autoguider (sold separately) as an expansion unit for the STAR BOOK TEN. An external autoguider which is compatible with the ST series
autoguiders from SBIG is available also. You can set up rates for compensation to guide the telescope accurately.
When you use the autoguider, it is recommended to refrain from using the following functions.
Atmospheric Refraction
P-PEC
Backlash Compensation
In addition, the following options are recommendable.
Direction Key: X-Y
Mount Type: Equatorial with Polar Setting
The value of the compensation can be set between 0 and 99 in one increment
both in RA and DEC.(0.1x of sidereal rate)
Enter a smaller value if you move the mount slower to make small
compensation, or enter a larger value if you move the mount faster to make a
larger compensation.
The optimum value for the compensation may vary according to equipment used.
Choose the most effective rate to make your auto guiding smoothest.
Auto guiding allows you to guide a telescope on
an equatorial mount automatically by means of
an autoguider, which compensates signals from a
CCD video camera attached on a guide scope to
achieve uniform and precise tracking speed of
the equatorial mount. The advantages of the
autoguider are most apparent during long-
exposure astrophotography.
For an operation of the autoguider unit, please refer to instruction manuals provided by the autoguider manufacturer.
In the “Mount Setting” menu, choose “AutoGuider” with the or direction key and press the key (or the key) to call up the
dialog box.
Move the cursor to available entry spaces
and enter values for compensation with
the or directionkey. Using the or
zoom key will increase or decrease the
number 10 each within the range.
Then, press the key twice (or press the key twice alternatively) to save and leave the
dialog box.
If autoguiding signals are detected by the
STAR BOOK TEN through its autoguider
port for corrections, the direction key
corresponding to the input signal will light to
indicate the status of the operation visually.
The illustration above shows the autoguider compensates signals in the R.A- (descending) direction.
The settings are defaulted to “RA: 10” and “DEC: 10”.
Using the AutoGuider
Tips for Better Autoguiding
Setting Rates for Compensation
What is Auto guiding?
1 1 2 2
0 : Keep sidereal rate (No compensation is made.)
1 : ±0.1x of sidereal rate
2 : ±0.2x of sidereal rate
3 : ±0.3x of sidereal rate
:
:
99 : ±9.9x of sidereal rate
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