Re: Any one using an ST-i for guider with Losmandy G2 conversation
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The says:
GUIDE PORT: This is where you connect the supplied 6 conductor modular phone style cable to the Autoguider (sometimes labeled "CCD") input port on your mount when using the ST-i as an autoguider, or when using Track & Accumulate with mount corrections (see the CCDOPS Manual for details of this mode
USB and POWER: Attach the 15-foot USB cable to any USB port on your computer AFTER you have installed the drivers and software for the ST-i. The USB port also provides power to the camera.
Appendix A ¨C Connector and Cables
Telescope Jack
The Telescope Jack is used to provide tracking signals to the tele- scope drive. Viewed from outside the camera, looking in, it has the following pin-out:
The Left, Down, Up and Right signals are driven from optically isolated photo transistors that conduct when telescope movement is desired. They can sink up to 25ma and can hold off up to 25V. If what you are plugging into is voltage based you¡¯ll need an external pull-up resistor. The Common signal is connected to the common on the four photo- transistors.
This appears to be the so-called ST-4 standard.
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