Garmin GDL 88 User Guide - Page 9
Introduction - antenna
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1 INTRODUCTION The GDL 88 is a remotely mounted ADS-B transceiver. There are four models of the GDL 88(D). Models with a single bottom mounted UAT antenna meet TSO C154c Class A1S and are available with or without an internal GPS/SBAS receiver. Models with one top mounted and one bottom mounted antenna meet TSO C154c Class A1H and are also available with or without an internal GPS/SBAS receiver. 1.1 GDL 88(D) System Functions The GDL 88 performs the following functions: • UAT transmission (978 MHz) The GDL 88 transmits ADS-B Out data on the 978 MHz (UAT) frequency to be received by other aircraft, vehicles, and ATC for situational awareness and traffic management. • UAT reception (ADS-B, ADS-R, TIS-B, and FIS-B) on 978 MHz The GDL 88 receives ADS-B data transmitted on the UAT link from other aircraft, vehicles, and ground stations to present a traffic situational awareness display for use by the flight crew. In addition, the GDL 88 receives FIS-B data on the UAT link to provide the flight crew with graphical and textual weather products. • Mode-S Extended Squitter reception on 1090 MHz The GDL 88 receives ADS-B data transmitted by aircraft on the 1090 MHz link to provided a comprehensive situational awareness traffic display for use by the flight crew. • Correlation of traffic reports from multiple traffic sources, including no heading source installations The GDL 88 is capable of interfacing with TCAD/TAS/TCAS I systems to create and present a "fused" situational awareness display to the flight crew. • Output of ADS-B and TAS/TCAS I traffic data to an external display The GDL 88 is capable of providing a situational awareness traffic display on compatible displays. • Output of FIS-B weather data to an external display The GDL 88 is capable of providing various textual and graphical weather 190-01122-03 Rev. A GDL 88 ADS-B Transceiver Pilot's Guide 1-1