User's Manual

GTS Processor Installation Manual Page 1-1

190-00587-50 Revision A

1 GENERAL DESCRIPTION

1.1 Introduction

This manual presents mechanical and electrical installation requirements for installing the GTS Processor

as a Traffic Advisory System (TAS) (GTS 825), Traffic Collision Avoidance System (TCAS I) (GTS 855),

and Traffic Collision Avoidance System (TCAS II) (GTS 8000).

1.2 Equipment Description

The GTS Processor is a microprocessor-based Line Replaceable Unit (LRU) that uses active interrogations

of Mode S and Mode A/C transponders to provide Traffic Advisories and Resolution Advisories (GTS

8000 only) to the pilot. When installed in a system the GTS Processor can be configured as a TAS (GTS

825) or can be upgraded to a TCAS I (GTS 855) or TCAS II (GTS 8000) by purchasing an enablement

card from Garmin. The GTS Processor meets the TSO/ETSO requirements for the configured traffic

system function (TAS, TCAS I, or TCAS II). When installed with a 1090 MHz ADS-B transmit class of

equipment the GTS Processor also utilizes passive surveillance. Traffic is displayed on an external MFD

via ARINC 429 and/or Ethernet High Speed Data Bus (HSDB). An aural alert is also provided to inform

the crew a traffic advisory (TA) or resolution advisory (RA) (GTS 8000 only) will be displayed.

A top-mounted directional antenna is used to derive bearing of the intruder aircraft, which is displayed

with relative altitude to own aircraft. Top antenna transmitted interrogations are directional, reducing the

number of transponders that receive the interrogation, and thus reducing potential garble on the 1090 MHz

band. For GTS 825 and GTS 855 installations, a bottom monopole or directional (highly recommended)

antenna is optional. For GTS 8000 installations, a bottom monopole or directional (highly recommended)

antenna is required. Bottom antenna transmit interrogations and broadcasts (GTS 8000 only) are omni

directional, using a monopole antenna or a directional antenna. A bottom directional antenna installation

gives the benefit of intruder bearing visibility for targets that are shaded from the top directional antenna.

The target bearing accuracy may be degraded for bottom directional antenna installations on aircraft with

fixed gear.

GTS Processor installations, configured as a GTS 855 TCAS I or GTS 825 TAS,

require a Garmin-approved transponder capable of receiving TCAS II broadcast

data.

GTS Processor installations, configured as a GTS 8000 TCAS II, require a GTX

3000 or other Garmin-approved RTCA DO-185A/B compatible transponder.

The GTS Processor is not to be installed in an aircraft with a TSO-C119a-only

compatible transponder.

A co-installed mode S transponder should be connected to the mutual suppression

bus, and meet the mutual suppression requirements of DO-181A or later

NOTE

DRAFT