Set Tracking Rate; Set Parking Position; Meridian Treatment - iOptron CEM70 Instruction Manual

guiding speed can be set between ±0.01X to ±0.90X sidereal rate. The DEC guiding speed can be set
between ±0.10X to ±0.99X sidereal rate. Follow the instructions of your autoguiding software for detailed
guiding operation.
CEM70G has an integrated guiding camera iGuider for ASCOM pulse guiding. Both CEM70G and
CEM70 have an ST-4 guiding port on mount base panel.
The ST-4 guide port wiring is shown in Figure 25, which has the same pin-out as that from a
Celestron / Starlight Xpress / Orion Mount / Orion Autoguider/ QHY5 autoguider.
If you have an autoguider which has the same pin-out as the ST-I from SBIG, such as Meade/
Losmandy/ Takahashi/ Vixen, make sure a proper guiding cable is used. Refer to your guiding camera and
guiding software for detailed operation.
WARNING: DO NOT plug your ST-4 guiding camera cable into the iPORT 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".
Set Up Time and Site
Beep Settings
Display Settings
Set Guiding Rates
Set Tracking Rate

Set Parking Position

Meridian Treatment

Set Altitude Limit
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 0.1000X to 1.9000X 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.
Figure 25. ST-4 port wiring
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