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iOptron GEM28 User Manual

iOptron GEM28
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27
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 five parking positions. Two positions that park the scope horizontally (Horizon Position).
Two positions that park the scope vertically (Zenith Position). Current Positionwill park the scope at its
current position. When the mount is turned on, it will use the last parking position setting as the default
setting.
5.4.7. 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 User Defined Speed”. The “User defined
speed” 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.
5.4.8. 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 Limitwill tell the mount when to stop tracking or to do a meridian flip. The limit
can be set at from 0° to 10° (40 minutes) pass meridian.
Set Behaviorwill determine if the mount will stop tracking or perform a meridian flip at the set
position limit.
5.4.9. 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.
5.4.10. Wi-Fi Option
This function will display WI-FI module functions. It is useful when connect the mount via wireless
connection.
Click on Wireless Status: displays will show:
SSID: HBX8409_XXXXXX
IP: 010.010.100.254
Port: 08899
MAC: XX-XX-XX-XX-XX-XX
Click on Restart will restart the Wi-Fi adapter and Restore to Factory to restore the factory settings.
5.4.11. GPS Status
Display if the GPS connection status. GPS ON indicates that the mount is still acquiring the satellite
data. GPS OK indicates the link has been established. GPS OFF indicates there is no GPS or the GPS is
malfunctioning. Do not leave the hand controller at this submenu.
Wireless Status
Restart
Restore to factory

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iOptron GEM28 Specifications

General IconGeneral
Payload Capacity28 lbs (12.7 kg)
Mount Weight10.4 lbs (4.7 kg)
RA Worm Gear MaterialBrass
DEC Worm Gear MaterialBrass
Tracking RateSidereal, Lunar, Solar
Autoguiding PortYes
Communication PortUSB
Tracking Accuracy± 5 arcsec
Weight10.4 lbs (4.7 kg)
Mount TypeEquatorial
RA Worm Wheel180 teeth
DEC Worm Wheel180 teeth
Motor DriveStepper motor
Power Requirement12V DC
GPSBuilt-in
Polar ScopeYes, included
Counterweight ShaftØ20 mm
Worm Gear Period600 seconds

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