Garmin International
1200 E. 151
st
Street Olathe, KS 66062
USA
ROTORCRAFT FLIGHT MANUAL SUPPLEMENT
for STC SR02123SE
GARMIN GDL 84H/88H ADS-B TRANSCEIVER
190-01310-J2 Rev. 1
Page 9 of 16
GENERAL
Garmin GDL 84H/88H UAT Transceiver
The Garmin GDL 84H/88H UAT Transceiver is an ADS-B system comprised of
a Garmin TSO-C154c GDL 84H/88H, one or two UAT/1090 antenna(s),
optional Garmin approved GPS/SBAS antenna, optional Garmin GPS/SBAS
position source, and other interfaces as shown in the following block diagram.
GDL 84H
Altitude Sensor
Transponder
Heading
(Optional)
= Installed by
this STC
= Prerequisite
Installation
Legend
Collective
Switch
Radio Altitude
OR
ADS-B
Annunciator
Altitude
Reporting Switch
(self interrogation only)
Bottom
UAT Antenna
Traffic Mute
Switch
(Optional)
Altitude Source
Transponder
GPS Antenna
ADS-B
Annunciator
(Optional)
Altitude Reporting
On/Off Switch
(self interrogation only)
Anonymous
Mode Switch
(Optional)
Audio Panel
TRAFFIC
Annunciator
Traffic Alerting (Optional)
Traffic Aurals
On/Off Switch
(without Radio Altitude)
Figure 1 – GDL 84H Block Diagram
GDL 88H
or
GDL 88DH
Bottom
UAT Antenna
GTN 6XX/7XX
or
GNS 400W/500W Series
Altitude Source
Transponder
Heading
(Optional)
Audio Panel
= Installed by
this STC
Collective
Switch
(Optional)
= Prerequisite
Installation
Legend
Radio Altitude
(Optional)
TAS/TCAS
(Optional)
Top
UAT Antenna
GDL 88DH Only
Traffic Mute
Switch
(Optional)
Figure 2 – GDL 88H Block Diagram
Summary of Contents for GDL 84H
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