Paramount GEM User Guide
136 | P a g e
Relative Home Sensor Position (Hour Angle)
Shows the hour angle of the homing sensor based on the mount’s synchronization information.
Relative Home Sensor Position (Declination)
Shows the declination of the homing sensor based on the TPoint model .
Absolute Home Sensor Position (Hour Angle)
This text box shows the mechanically fixed hour angle of the homing sensor. This value cannot be changed and is
always HA = 0.0 and Dec = 0.0 in the northern hemisphere; hour angle 12.0, declination 180.0 in the southern
hemisphere.
Absolute Home Sensor Position (Declination)
This text box shows the mechanically fixed declination of the homing sensor. This value cannot be changed for
the Paramount ME, MX or MYT mounts.
See the “Advanced Parameters” on page 113 for a discussion of the differences between the relative and absolute
homing position.
Note on Southern Hemisphere Hour Angle and Declination Values
Figure 65 shows the home sensor’s absolute position and relative position for the southern
hemisphere. Both values reflect the mechanical position of the mount, not actual sky
coordinates. This convention allows TheSky Professional to know which side of the pier the
telescope resides.
To convert the mechanical hour angle to the sky hour angle, subtract 12. Take 180 minus the
declination to convert the mechanical declination to sky declination.
Configured For Text Box
This text box shows the current hemisphere configuration.
Northern and Southern Buttons
The Northern and Southern buttons are used to configure the mount for operation in either hemisphere. The
default configuration is for the northern hemisphere. When the mount is in the southern hemisphere, click the
Southern button so that the sidereal tracking direction is reversed, and the homing sensor positions can be
updated. The control system is automatically “rebooted” so that these changes take effect.
Reboot/Update Firmware
If control system is emitting continuous beeps (for example the mount has encountered a fixed object like the
side of the pier so that the motors have stopped) the control system should be restarted and then homed (page
Error! Bookmark not defined.). To restart the control system, on the right side of the Utilities tab, click the
Reboot/Update Firmware text, then, under Reboot Bisque TCS on the left side of the window, click the Reboot
Normally button.
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