Garmin GTS 820 TAS, Pilot'S Manual, Page: 20 / 40

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Garmin GTS Traffic Systems 190-00587-02 Rev. E
SECTION 6 SYSTEM OPERATION
6.1 Operating Modes
The system typically powers up in Standby mode. In Standby mode, the
system is powered on, but no traffic surveillance functions are performed.
Operate mode is the normal mode for operations. All active and ADS-B In
traffic surveillance functions are performed in Operate mode.
Self-test mode is a manually-selected mode that briefly performs a test of the
system. Refer to the self-test section of this guide for additional information.
If the system detects a fault that will prevent normal operation, the system
will enter and remain in Fail mode.
For GTS 800, GTS 820, and GTS 850 systems using SW v4.12 or later or
GTS 825 and GTS 855 systems using SW v3.12 or later, the unit can be
configured to have the ADS-B In function operate independent of active
surveillance. When configured to operate independently, the ADS-B In feature
turns on automatically after power up and also after becoming airborne. The
ADS-B In feature will also continue to function if the system detects a failure due
to altitude source failure or transponder interface failure.
6.1.1 Control of Modes
Standby, Operate, and Self-test modes may be manually selected via system
controls. When the ADS-B In function is installed and the unit is in Operate
mode, the ADS-B in feature can be turned on and off. The controls are either
integrated with the traffic display(s) or installed as external control switches.
For display(s) that integrate control of ADS-B In and GTS Modes, configuration
can be set to allow ADS-B In feature to be turned on or off while GTS is in
Standby. This feature requires display(s) support.