Garmin GTS 800 Pilots Guide - Page 10

GTS 8XX Interface 1.4 Aural Alerts A TA consists of a displayed traffic symbol (solid yellow circle) and an aural alert. The aural alert announces "traffic", followed by the intruder aircraft's position, altitude relative to own aircraft ("high", "low", or "same altitude"), and distance from own aircraft; e.g. "traffic, 12 o'clock, high, 3 miles". 1.5 Self-Test The GTS 8XX automatically performs a self-test upon power up. The self-test checks internal parameters and calibrates components of the GTS 8XX. The self-test can also be initiated by the user during normal operation. Check for the following test criteria on the Traffic Page during power-up: • If the GTS 8XX passes the power-up test; and the aircraft both has a squat switch and is on the ground, the Standby Screen is displayed (Figure 2). • If the GTS 8XX passes the power-up test and the aircraft both has a squat switch and is airborne, the Traffic Page is displayed on the 6-nm display range and in the normal altitude display mode. • If the GTS 8XX passes the power-up test and the aircraft does not have a squat switch, the Standby Screen is displayed (Figure 2). • If the GTS 8XX fails the power-up test (as indicated by a FAILED screen), the GTS 8XX is inoperable, see the GTS 8XX Installation Manual for detailed information on Failure Response. NOTE: The FAILED message is displayed when the system detects an error that prohibits further traffic display operation. NOTE: When the system is in standby, the GTS 8XX does not transmit, interrogate, or track intruder aircraft. 4 400/500 Pilot's Guide Addendum for GTS 8XX Interface 190-00140-78 Rev. A