Raytheon 138-119 Operator's And Service Manual page 4

3769DOC000001
Change Over Box
COMMERCIAL NOTES
Change Over Box in application with GG--R and GGM--R
Not all Status messages/Alarms are displayed at the Operator Unit.
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It has to be assured that all the alarm--contacts of both Distribution
Units (system Failure) are connected to an external Alarm Units.
The DV--Bus is not switched--over by the Change Over Box.
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A difference alarm (G/G or G/M) does not lead to a switch--over in the
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Change Over Box.
At one of the two Operator Units the automatic switch--over--function
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G --> G or G --> M has to be set. Thus ensures a switching --over
from a failed selected sensor to the next heading sensor in function.
Connected repeater should be configured in such a manner, that
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heading from a gyro is as well indicated as heading from a magnetic
sonde.
Information and/or data to operate the compass have to be stored
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twice (for each Distribution Unit), by operating the Change over
Switch into the respective position.
138- -119
II
Edition: December 08, 2005