Troubleshooting
Installation Manual
Page 50
560-0405-00 Rev –
December 14, 2001
© 2001 by UPS Aviation Technologies Inc.
9.2.3.9
Top Antenna Fail Status
This display is used to display the top antenna BITE failure if a failure is detected and the
top antenna fail LED is illuminated.
9.2.3.10
Bottom Antenna Fail Status
This display is used to display the bottom antenna BITE failure if a failure is detected and
the bottom antenna fail LED is illuminated.
9.2.3.11
Altitude Fail Status
This display is used to display the altitude failure. The failure displayed is dependent
upon the selection of the altitude type program input.
The altitude source, either 1 or 2, is displayed on the first line.
The altitude type is displayed on the second line: ADC (429), Gillham, or Synchro.
The failure is displayed on the third line, depending on the type.
If ADC (429) is selected, then the failures will be “Invalid” or “No data”.
If Gillham is selected, then the failure will be “Invalid” if an invalid code is input, or
“Compare Fail” if the altitude compare is enabled and the compare fails.
If synchro is selected, then the failures will be “Invalid” if an invalid synchro or reference
input is detected or “Flagged” if the synchro flag input indicates an invalid condition.
For flight leg results all two faults can be displayed one per line starting on the second
line. Both Altitude Source 1 and Altitude Source 2 pages can be displayed if failures oc-
curred for each while they were selected.
Top Antenna
BITE Test Fail
Bottom Antenna
BITE Test Fail
Altitude SRC #1
Type: ADC (429)
Invalid
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