Vixen AGA-1 - Manual (Page 12)

GUIDE MODE
This mode allows you to begin the autoguiding.
Ⓓ! Pressing the “Guide” key
If you press the “Guide” key, AGA-1 will automatically control the
motor drive to center the guide star on the monitor screen.
During centering the guide star, the green guide indicator will
blink.
When the guide star is centered, the indicator will become solid
green.
Note: After pressing the key, it takes a few seconds to a few
minutes to begin the auto-guiding. It depends on
where the guide star is on the monitor screen.