Celestron Compustar Manuál s instrukcemi stáhnout pdf (Strana 21)

receptacle for the retaining clip on the bottom, then pin 1 for the white wire will be on the left,

and so on, with pin 6 for the blue wire on the right (Figure 13).

Figure 13. View into a female RJ-11 modular jack port with the pins at the top and the

receptacle for the retaining clip on the bottom, indicating how pin 1 for the white wire will

be on the left. Pin 6 for the blue wire will be on the right.

Autoguider “Languages”

The color-coded wires in the RJ-11 cable will be used to carry electrical impulses from the

autoguiding computer to the Compustar mount, commanding it to move right or left in the

horizontal direction (that is along the Right Ascension, or R.A., axis), or up or down (that is

along the Declination, or Dec., axis). These directions are often referred to as +X, -X, +Y and -

Y, respectively, in autoguiding software and autoguiding wiring diagrams. However, be aware

that they may also be referred to as +R.A., –R.A., +Dec. and –Dec, respectively. Consider them

interchangeable.

The issue is which wires in the RJ-11 cable will be used to carry which commands. Which wire

is connected to which lead on a plug, such as an RJ-11, is known as its pin out. Using one

combination of wiring, or pin out, to carry the 4 command directions as opposed to another is

essentially using one autoguider “language” instead of another.

Unfortunately, there is no universal, or even a standard, language for autoguiding. However, the

pin out used by SBIG for the ST-4 autoguider is one of the most commonly used languages and

it is the one we will use for autoguiding the Compustar. Many autoguiding software programs

use this particular language. Check both the autoguiding software AND the computer output

connector that you intend to use with your Compustar to ensure that they both use the ST-4

language/pin out. All connectors produced by Shoestring Astronomy use the ST-4 language.

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Celestron Compustar Manuál s instrukcemi Strana 21