Eclipse EA500 Maintenance Manual page 279

ADS-B OUT WITH GPS 3 - DESCRIPTION AND OPERATION
AMM-34-50-21-081-801
1. Introduction
A. The Automatic Dependent Surveillance – Broadcast Out (ADS-B Out) provides air traffic
controllers with real-time position information.
B. ADS-B Out with GPS 3 system have these components:
• One GPS antenna (GPS 2) (Combination Antenna)
• One GPS 2 Antenna Splitter
• One GPS/Wide Area Augmentation System (WAAS) sensor GPS 3 (GDL 88)
• One ADS-B fail annunicator
2. Description
A. ADS-B OUT System with Dual Transponder System (Diversity or Non-Diversity).
(1) The Dual Transponder System, both transponders are the Enhanced Mode S
transponders with or without the antenna diversity by Garmin, models GTX–33(D).
Both transponders, XPDR 1 and XPDR 2, are located behind the Instrument Panel
(IP).
(2) The GPS 3 (GDL 88) unit is located beneath the cabin floor on the left side of the
aircraft.
(3) The GPS 2 Antenna Splitter is located under the aft baggage compartment floor.
(4) ADS-B system failure annunciation (based on the GPS 3 position source failure) is
located in the cockpit on the lower left instrument panel.
3. Operation
A. The ADS-B OUT system utilizes the Extended Squitter (ES) capability of the
transponders.
GPS 3 (GDL 88) with internal GPS provides the necessary ADS-B OUT compliant
position data to the already installed transponders. GPS 3 outputs the ADS-B OUT
compliant GPS data to both transponders via a dedicated RS-232 line.
B. GPS 3 (GDL 88) makes use of the GPS 2 antenna through the GPS 2 Antenna Splitter,
which is located below the aft baggage compartment floor.
C. The ADS-B system failure indicator provides an advisory message to the pilot via a white
ADS-B FAIL indication if any of the following events occur:
• GPS 3 loses its integrity
• During R Smoke Clear procedure
• Manually pulling ECB
• Battery-only Load shed
• Unintended power loss
EFFECTIVITY: ALL POST MB 500-34-030
EA500 Aircraft Maintenance Manual — 06-117751
© 2020 Eclipse Aerospace, Inc.
Temporary Revision No. 34-21
34-50-21
Sep 30/20
Page 1