Appendix J - Search Algorithms
Page J-8
15Oct99
If however a signal is found during the full scan a signal threshold
level based on the best received signal is stored in the Capsat®
Telephone. When a signal above this signal threshold level is found
during the next scan the Capsat® Telephone will command the land
mobile antenna into fine tuning.
Please note that if a full skyscan has been made with success once it
is not performed anymore unless
•
the Area/Ocean Region is changed
•
the signal is lost or below the signal threshold level for a very long
time (app. 15 minutes).
Fine Tuning
Fine Tuning
The fine tuning finds the best elevation angle of the land mobile
antenna. The Capsat® Telephone sends continuous signal information
to the land mobile antenna during the fine tuning.
NOTE:
During the fine tuning the land mobile antenna may not be moved.
Reacquisition skyscan
Reacquisition skyscan
The reacquisition skyscan searches the sky for the first signal from
the satellite belonging to the Area/Ocean Region currently selected.
The search is made as a 360 degrees turn in azimuth with the fixed
elevation angle found during the last fine tuning. The message "Re.
skyscan - started" will be displayed in the handset.
If no signal is found within app. 15 minutes a full skyscan will be
performed.
If however a signal is found which is above the signal threshold level
the Capsat® Telephone will command the antenna into step tracking
and follow the description mentioned at power on.
Step tracking
Step tracking
The step tracking fine-tunes the antenna position towards the
satellite. The message "Step track. - started" will be displayed in the
handset. The Capsat® Telephone sends continuous signal information
to the land mobile antenna. The step tracking will takes place also
when making calls although the update rate will be slower.
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Страница 85: ...Appendix A List of Abbreviations 15Oct99 Page 69 ...
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Страница 116: ...Appendix G List of System Errors Page G 2 15Oct99 ...
Страница 118: ...Appendix H Trouble Shooting Page H 2 15Oct99 ...
Страница 120: ...Appendix I Extended Error Codes Page I 2 15Oct99 ...
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Страница 151: ...Appendix L Spot Beam Coverage 15Oct99 Page L 21 Figure Figure 6 6 8 8 Indian Ocean Region Indian Ocean Region ...