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4.2.5 Failed IRD Status Check
As detailed in Appendix E, TracVision LF/SF completes a detailed
startup routine whenever it is turned on. One of the first checks
is the IRD status test. As noted in the typical startup cycles, the
expectation is that the IRD and its communications link to
TracVision LF/SF will pass this test. There are, however, two
alternate results, each indicating a slightly different problem.
Test Result: NONE
If the system tests achieves a result of NONE, there is no
communication at all between the antenna unit and the IRD.
Solution
Check to be certain that the IRD and TracVision LF/SF are
connected properly at the low-speed data port and that both are
powered on. Refer to Section 2.3, “Connecting System Components,”
for correct antenna unit to IRD wiring procedures and diagrams.
After verifying the connection, cycle the power off and on and
review the startup test results.
Test Result: UNKNOWN
In the instance of a result of UNKNOWN, a communications link
exists, but the data received by the antenna unit is garbled and
unrecognizable.
Solution
As with a result of NONE, first check to be certain the IRD and
TracVision LF/SF are connected properly at the low-speed data
port. Refer to Section 2.3, “Connecting System Components,” for
correct antenna unit to IRD wiring procedures and diagrams.
After verifying the connection, cycle the power off and on and
review the startup test results. If this does not initially succeed,
refer to Section 4.2.2, “AC Power Fluctuating,” and follow the IRD
reset procedure.
4.2.6 IRD Faulty
In the case of a faulty IRD, refer to your IRD user manual for
service, replacement, and warranty information.
4-5
Troubleshooting
54-0194 Rev. D