Garmin GTS 855 User Manual download pdf (Page 18)

Garmin GTS 8XX Series Trafﬁc Advisory System

190-00587-02 Rev. A

System Test

NOTE: GTS 8XX Series trafﬁc surveillance is not available during the system

test. Use caution when performing a system test during ﬂight.

The GTS 8XX Series provides a system test mode to verify the TAS system is

operating normally. The test takes ten seconds to complete. When the system test

is initiated, a test pattern of trafﬁc symbols is displayed on the Trafﬁc Page. If the

system test passes, the aural announcement “TAS System Test Passed” is heard,

otherwise the system announces “TAS System Test Failed.” For the GTS 850,

the aural announcement is “TCAS System Test Passed/Failed.” When the system

test is complete, the GTS 8XX Series enters Standby Mode. The system may be

installed so that the system test is unavailable during ﬂight.

Figure 7 Self-Test Mode

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Garmin GTS 855 User Manual Page 18