Garmin GDL 88 Series Pilots Guide - Page 39

Interfaces

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6.2 Interfaces 6.2.1 Audio Panel Traffic alert audio output can be interfaced to a audio panel with a compatible unswitched unmuted audio input. This is optional for no display installations. 6.2.2 Altitude Source The GDL 84/88 requires the use of ownship pressure altitude for transmission of required ADS-B Out data values and to calculate the vertical separation and vertical closure from target aircraft. 6.2.3 Heading Source (optional) The GDL 84/88 can optionally use heading for inclusion in the ADS-B message. Additionally, the GDL 88 can optionally use heading for the purpose of correlating ADS-B traffic and traffic received from the external traffic system. Heading is provided to the GDL 88 from any compatible magnetic heading source. Multiple heading sources may be connected to the the GDL 84/88. See section 4.2.3 for details about the display of traffic when a heading source is not provided. 6.2.4 GPS Position Source The GDL 84/88 uses the ownship GPS position for creation of the ADS-B Out messages as well as the receipt and tracking of ADS-B In targets. The GDL 88 without the internal GPS WAAS requires at least one compatible GPS position source be installed, while the GDL 88 with the internal GPS WAAS engine may optionally be interfaced with compatible sources. The GDL 84 has an internal GPS WAAS engine and does not accept an external GPS source. 6.2.5 Radar Altimeter (Optional) The GDL 84/88 can optionally be interfaced with a radar altimeter to drive the sensitivity level of the Conflict Situational Awareness (CSA) application. 6.2.6 Traffic Mute (Optional) The GDL 84/88 can optionally interface with a pilot controlled switch to acknowledge an active Conflict Situational Awareness (CSA) alert and mute the associated aural alert. This momentary switch only mutes the current CSAs and does not act as an inhibit for future CSA aural annunciations. 190-01122-03 Rev. E Garmin GDL 84/88 ADS-B Transceiver Pilot's Guide 6-3

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6-3
190-01122-03
Rev. E
Garmin GDL 84/88 ADS-B Transceiver Pilot’s Guide
6.2
Interfaces
6.2.1
Audio Panel
Traffic alert audio output can be interfaced to a audio panel with a compatible
unswitched unmuted audio input. This is optional for no display installations.
6.2.2
Altitude Source
The GDL 84/88 requires the use of ownship pressure altitude for transmission
of required ADS-B Out data values and to calculate the vertical separation and
vertical closure from target aircraft.
6.2.3
Heading Source (optional)
The GDL 84/88 can optionally use heading for inclusion in the ADS-B message.
Additionally, the GDL 88 can optionally use heading for the purpose of correlating
ADS-B traffic and traffic received from the external traffic system. Heading is
provided to the GDL 88 from any compatible magnetic heading source. Multiple
heading sources may be connected to the the GDL 84/88. See section 4.2.3 for
details about the display of traffic when a heading source is not provided.
6.2.4
GPS Position Source
The GDL 84/88 uses the ownship GPS position for creation of the ADS-B Out
messages as well as the receipt and tracking of ADS-B In targets. The GDL 88
without the internal GPS WAAS requires at least one compatible GPS position
source be installed, while the GDL 88 with the internal GPS WAAS engine may
optionally be interfaced with compatible sources. The GDL 84 has an internal GPS
WAAS engine and does not accept an external GPS source.
6.2.5
Radar Altimeter (Optional)
The GDL 84/88 can optionally be interfaced with a radar altimeter to drive the
sensitivity level of the Conflict Situational Awareness (CSA) application.
6.2.6
Traffic Mute (Optional)
The GDL 84/88 can optionally interface with a pilot controlled switch to
acknowledge an active Conflict Situational Awareness (CSA) alert and mute the
associated aural alert. This momentary switch only mutes the current CSAs and
does not act as an inhibit for future CSA aural annunciations.