User's Manual

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WARNING: DO NOT plug your ST-4 guiding camera cable into the iOptron port or HBX
port. It may damage the mount or guiding camera electronics.
5.4.5. Set Tracking Rate
You can set up the mount tracking rate by selecting “Set Tracking Rate”.
Then the user can select “Sidereal Rate”, “Lunar Rate”, “Solar Rate”, “King Rate”, and “Custom
Rate”. The “Custom Rate” can be adjusted from 0.9900X to 1.0100X of sidereal.
The “King Rate”, developed by Edward S. King, corrects the tracking rate of a telescope to account for
atmospheric refraction. This is more useful for unguided tracking.
5.4.6. Set Parking Position
You may park the telescope before powering off the mount. This is very useful if the mount is on a
permanent pier or the mount will not be moved in between observation sessions. The mount will keep
all the alignment info and reference points.
There are six parking positions. Two positions that park the scope horizontally (Horizon Position). Two
positions that park the scope vertically (Zenith Position). “Current Position” will park the scope at its
current position. Alternatively, you can enter any altitude and azimuth combination for “Custom
Parking Pos.”. When the mount is turned on, it will use the last parking position setting as the default
setting.
5.4.7. Meridian Treatment
This function tells the mount what to do when it tracks past the meridian. You can tell the mount if it
needs a meridian flip and when to do it.
 “Set Position Limit” will tell the mount when to stop tracking or to do a meridian flip. The limit
can be set at from 0° to 15° (1 hour) pass meridian for Northern Hemisphere and 0° to 10° for
Southern Hemisphere.
 “Set Behavior” will tell the mount if a meridian flip will be performed.
5.4.8. Set Altitude Limit
This function allows the mount to keep tracking an object even if it is below the horizon but can still be
seen, for example from an elevated observation site, such as a hill. The range can be set from -89° to
+89°. The default limit is 00°. Be careful when setting this limit. It may cause mount goto problems.
5.4.9. Polar Scope Bright.
Use this function to adjust the light intensity of the CEM40 illuminated polar scope.
5.4.10. HC Heating Switch
Turn on/off the controller LCD back heater. When “Heating ON” is selected, the heater will be
automatically turned on when the ambient temperature reaches 0°C (32°F) and shut off at 10°C.
Set Up Time and Site
Beep Settings
Display Settings
Set Guiding Rates
Set Tracking Rate
Set Parking Position
Meridian Treatment
Set Altitude Limit