Garmin 0212800 User Manual

GIA 6300 Installation Information and Description

			DRAFT
Contents
1	Overview		...............................................................................................................................................		2
2	Physical Characteristics.........................................................................................................................				2
3	Installation Overview ............................................................................................................................				3
	3.1	Cabling and Wiring........................................................................................................................			3
	3.2	VHF COM Cable Routing ...............................................................................................................			3
4	Cooling Accessory .................................................................................................................................				3
5	GIA6300 Interfaces................................................................................................................................				4
	5.1	I/O Data Concentration and Computation (provided by Main Boards)			....................................... 4
	5.1.1		Active Low/High Discrete Inputs and Outputs......................................................................		4
	5.1.2		Configurable ARINC-717/708 Interface ................................................................................		5
	5.1.3		Ethernet ................................................................................................................................		5
	5.1.4		RS-485/422............................................................................................................................		5
	5.2	VHF COM Interfaces......................................................................................................................			5
	5.2.1		Key Event Out........................................................................................................................		6
	5.2.2		RX Squelch Break...................................................................................................................		6
	5.2.3		Emergency COM Operation ..................................................................................................		6
	5.3	NAV	...............................................................................................................................................		6
	5.4	Audio Panel ...................................................................................................................................			6
	5.4.1		Transceiver Interfaces...........................................................................................................		7
	5.4.2		Receiver and Alert Inputs......................................................................................................		7
	5.4.3		Headset Outputs and Microphone Inputs ............................................................................		7
	5.4.4		AES3 Interface.......................................................................................................................		7
	5.4.5		Discrete Inputs and Outputs .................................................................................................		8
	5.4.6		Summed Audio Output .........................................................................................................		9
	5.4.7		Speaker Output .....................................................................................................................		9
	5.4.8		External RF Interfaces ...........................................................................................................		9
6	Power ....................................................................................................................................................				9
7	Environmental Qualifications..............................................................................................................				10
8	System Interconnect ...........................................................................................................................				10
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8.1	Unit Level Connections ...............................................................................................................		10
8.1.1		Main A and Main B Redundancy.........................................................................................	10
8.2	System Level Connection ............................................................................................................		11
9 GIA6300 Pin Out..................................................................................................................................			12
10	Electrical Bonding............................................................................................................................		12
11	Antenna Considerations..................................................................................................................		12
11.1	VHF COM Antenna Location .......................................................................................................		12
12	License Requirements.....................................................................................................................		13

1 Overview

The GIA 6300 is an integrated avionics unit meeting robust environmental requirements. The major functions of the GIA6300 are:

•Communications Hub and Data Concentrator,

•VHF digital COM (118 – 152 MHz; extended frequency range),

•VOR/VLOC and GBAS receiver,

•Glideslope receiver,

•GPS SBAS receiver,

•Audio Selection, and

•Marker Beacon Receiver.

•Other functions such as AFCS (Flight Director) have significant portions of their processing executed by the GIA 6300.

The GIA 6300 is designed as though the functions are spread out across a federated system. This provides independence and redundancy between the functions.

2 Physical Characteristics

The GIA 6300 is 7.4” wide x 5.86” high (with the mounting rack). It has a depth of 14.48” to the end of the strain relief. And additional 0.5“ of clearance is desired behind the cooling accessory to allow for adequate ventilation, and this clearance should be no less than 0.25” .

The weights for the unit and its accessories are listed below.

	Unit (Standalone)	11.94 lbs
	Mounting Rack	0.57 lbs
	Cooling Accessory	0.65 lbs (approximate TBD)

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3 Installation Overview

3.1 Cabling and Wiring

Coaxial cable with 50 Ω nominal impedance and meeting applicable aviation regulations should be used for the installation. A typical maximum cable length for the GPS antenna is 40 feet. The installer shall insure that the attenuation of the GPS cable run falls between 3 dB and 7 dB inclusive at 1.5 GHz.

3.2 VHF COM Cable Routing

Avoid routing the COM antenna cable near aircraft control cables or near GPS antenna cables. Avoid sharp bends in the antenna cable.

Check for insertion loss and Voltage Standing Wave Ratio (VSWR). VSWR should be checked with an inline type VSWR/wattmeter inserted in the coaxial transmission line between the transceiver and the antenna. The VSWR meter should be inserted as close to the transceiver as possible. Any problem with the antenna installation is most likely seen as high reflected power. A VSWR of 3:1 may result in up to a 50% loss in transmit power. VSWR at the low, mid and high end of the tuning range should be less than 3:1, for best performance VSWR should be less than 2:1. A high VSWR decreases the amount of power radiated by the antenna and increases power supply current and heat dissipated by the radio when the radio is transmitting.

4 Cooling Accessory

The GIA 6300 requires cooling accessory, 011-03516-00, for normal operation. This cooling accessory contains 4 fans, powered by the GIA Main Boards. Main A powers 2 of the fans, and Main B powers the other 2. The GIA 6300 can operate at full functionality with up to 2 fan failures.

A ported version of the cooling accessory could be considered/designed if desired by an OEM.

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5 GIA6300 Interfaces

5.1 I/O Data Concentration and Computation (provided by Main Boards)

Table XXX lists the interfaces provided by Main A and Main B in the GIA 6300. Main A and Main B in the GIA6300 function as two independent units, and interfaces to specific units should not be split across the boards if practical. Additionally, where practical, primary and secondary sensors should be split between the two boards so that one board does not directly connect to both the primary and secondary sensor for given data.

Interface Description	Quantity	Comment
Active Low Discrete	4
Input
Active Low/High Discrete	30
Input
Active Low/High Discrete	20
Output
ARINC-429 Receiver	26
ARINC-429 Transmitter	8
ARINC-717/429	2
Transmitter
ARINC-717/708 Receiver	2
ARINC-743 GPS Time-	1
Mark Output
Ethernet	4
RS-485	14
RS-232	10
CAN	2
Analog Audio Output	1

5.1.1 Active Low/High Discrete Inputs and Outputs

The GIA 6300 has configurable discrete I/O in order to use the pins on the external connector more efficiently. Each discrete interface, input and output, is configurable between either active high or low.

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Each discrete output is capable of sourcing 20 mA in the active state when configured as active high. Six discrete outputs (3 per main board) can be used as super flag outputs capable of providing up to 0.5 Amps of current. Active low states are capable of sinking up to 0.5 Amps.

All of the discrete outputs have a default state of inactive implemented during and after a reset. This is specifically targeted at those outputs supporting auto pilot functionality, ensuring that those outputs reset when the microprocessor resets.

Each discrete input provides 1mA of wetting current when connected to ground.

Both the Audio and Main board are capable of reading the state of 10 of the discrete inputs, and these pins should be reserved as practical. This provides a low latency input path to the audio panel to allow for current and future functionality where delay is undesirable. These functions include 3D Audio, oxygen mask selection, key’ed ICS, and additional ASR Push-to-Command inputs.

5.1.2 Configurable ARINC-717/708 Interface

The GIA 6300 can support any combination of 2 ARINC-717 transceivers and 2 ARINC-708 receivers. The GIA 6300 has an ARINC-708 receiver to support interfacing to a 3rd party radar. The GIA 6300 also supports an ARINC-717 transceiver to add support for connecting to a 3rd party Flight Data Recorder. These interfaces are combined such that they can be configured between ARINC-717 and ARINC-708.

5.1.3 Ethernet

The GIA 6300 has a total of 4 Ethernet interfaces. The 4 Ethernet interfaces are divided equally between the two processors on the main boards, each interface can be used to support redundant connections to the rest of the system from each processor. Each processor can have two high speed communication paths independent of the 2nd processor.

These Ethernet interfaces are all capable of up to 100 Mbps of bandwidth, but it is not available in flight.

5.1.4 RS-485/422

The GIA 6300 has a total of 14 RS-485 transceivers. Any two of these transceivers can be paired together to make one RS-422 interface allowing up to 7 RS-422 interfaces. The RS-485/422 interfaces are capable of a maximum baud rate of 921.6 kbps.

5.2 VHF COM Interfaces

Interface Description	Quantity	Comment
Analog Audio Output	1
Analog Audio Input	1
Active Low Discrete Inputs	2
Active Low Discrete Outputs	1
Active Low Discrete	1
Input/Output
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