Garmin GIA 6300 Service manual

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GIA 6300 Installation Manual
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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
1Overview
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.
2Physical 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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3Installation 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 in-
line 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.
4Cooling 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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5GIA6300 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
Input
4
Active Low/High Discrete
Input
30
Active Low/High Discrete
Output
20
ARINC-429 Receiver
26
ARINC-429 Transmitter
8
ARINC-717/429
Transmitter
2
ARINC-717/708 Receiver
2
ARINC-743 GPS Time-
Mark Output
1
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
Input/Output
1

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5.2.1 Key Event Out
The Key Event Out active low discrete output signals that the GIA COM is transmitting. In installations
with more than 2 VHF COM radios, this input can be used to connect to the Transmit Interlock input on
the other radios.
5.2.2 RX Squelch Break
The RX Squelch Break active low discrete output/input signals that the RF squelch has broken on the
COM receiver. This output may be used in the future to hold off digital transmissions or to coordinate
two digital transmitters in a CSMA environment. This pin functions as both the input and output signal
for a single signal between all of the digital radios in the system: the two GIA 6300s and the GDR 66.
5.2.3 Emergency COM Operation
The Emergency COM Operation active low discrete input tunes the transceiver to the emergency
frequency, 121.500 MHz, when active.
5.3 NAV
Interface Description
Quantity
Comment
Analog Audio Output
1
5.4 Audio Panel
Interface Description
Quantity
Comment
Transceiver (I/O) Interface
3
Transceiver (I/O) / Microphone
Interface
4
Receiver Inputs
7
Alert Inputs
4
Crew Headset Outputs
2
Passenger Headset Outputs
2
Microphone Inputs
6
Music Inputs
2
AES3 Interfaces
2
Active Low Discrete Inputs
6
Active Low Discrete Outputs
7
Summed Audio Output
1

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Speaker Outputs
2
5.4.1 Transceiver Interfaces
The GIA 6300 supports a total of 8 radio transceivers including the internal VHF COM radio. One of
these interfaces is used to connect to the cross-side GIA 6300 VHF COM.
Four transceiver inputs can be configured as microphone inputs. This allows a total of 8 passenger or
support staff positions per GIA 6300. In cases where both 8 passenger microphones and 8 transceivers
are required, some of the receiver and alert inputs can be repurposed as transceiver inputs.
5.4.2 Receiver and Alert Inputs
The GIA 6300 has a total of 11 differential audio inputs. These can be used as either un-switched, alert
inputs or as inputs from radio receivers. Two of these inputs are used to interface from the cross-side
GIA 6300 NAV radio and Alert Output.
With the division list in Table XXX, the GIA 6300 will be capable of supporting up to 8 receiver inputs
including the integrated NAV radio.
5.4.3 Headset Outputs and Microphone Inputs
The GIA 6300 will be capable of supporting 2 crew members and 4 or 8 passenger headset locations per
unit. This is facilitated with 2 headset-microphone crew locations and a two passenger headset outputs
with 4 microphone locations (and the 4 configurable Transceiver/Microphone inputs).
The Pilot Headset and Microphone interface has a hardware failsafe connection to the integrated VHF
COM. When in hardware failsafe, the Pilot microphone input will be hardwired through relays to the
COM input and the COM output will be hardwired through relays to the Pilot Left Headset output.
Each of the passenger headset output is capable of driving 4 stereo headsets in parallel. If desired, the
output can be configured as two mono channels allowing 2 groups of passengers to receive separate,
mono selected audio sources per output. The total number of passengers supported by the GIA 6300 is
limited by microphone inputs, 8.
5.4.4 AES3 Interface
The GIA 6300 has 2, digital, AES3 interfaces (primary and secondary). The primary AES3 interface
implements carries ICS, communication, and navigation related audio between GIAs.
The secondary AES3 interface can be used to carry high fidelity music audio. This secondary interface
will be configurable to either carry 8 (4 stereo) high fidelity channels, or 24 low fidelity channels (just like
the primary AES3 interface).

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GIA 6300
GIA 6300
GIA 6300
GIA 6300
GIA 6300
GIA 6300 GIA 6300
(A) (B)
(C)
(A) Dual GIA 6300 system with single AES3 connection, (B) Dual GIA 6300 system with Dual AES3
connection, (C) Triple GIA 6300 installation.
Figure XXX illustrates the AES3 interconnect configurations provisioned by the GIA 6300 AES3 interfaces.
The majority of GIA 6300 installations will require only the low fidelity connection depicted by (A) with
cross-side music audio being implemented with wiring splices. Connecting the secondary AES3 interface
as per (B) allows up to 4 entertainment audio sources to be connected to the audio system.
For a Triple GIA 6300 system, as depicted in (C) of Figure XXX, the secondary AES3 interfaces will be
configured to run in the low fidelity mode and the GIA’s will be connected in a loop. Each GIA 6300 only
provides the audio sourced by its specific inputs.
5.4.5 Discrete Inputs and Outputs
The Audio board provides 6 discrete, active low inputs and 7 discrete, active low outputs. The 7 outputs
are for providing Push-To-Talk keys to the externally connected transceivers.
The 7 discrete inputs are divided up as follows.
a. 3 Push-To-Command keys for signaling an Automatic Speech Recognition Request,
b. 2 Push-To-Talk keys for signaling the desire to transmit on the selected transceiver, and
c. 1 Force Failsafe Input. When the Force-Failsafe input is active, the unit is placed in
Hardware Failsafe outside of software control.
Note that there is an additional 10 discrete inputs available from connections shared with the main
boards.

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5.4.6 Summed Audio Output
The GIA 6300 has a summed audio output suitable for driving a CVR input. When in hardware failsafe,
the COM is hardwired to the Summed output.
5.4.7 Speaker Output
The GIA 6300 has two speaker outputs to support mid-sized aircraft that need one or two additional PA
speakers in the cabin area but do not need the flexibility or output capabilities of a full IFE or passenger
address system. Both speaker outputs will be capable of outputting 10W into a 4-ohm load and 5W into
an 8-ohm load.
5.4.8 External RF Interfaces
The GIA 6300 has 5 separate RF interfaces:
•VHF COM RF In/Out,
•VLOC RF In,
•Glideslope RF In,
•GPS/SBAS RF In, and
•Marker Beacon RF In
6Power
The Main A, Main B, COM, and Audio Boards will all have separate, independent power supplies with
separate Power connections on the external connector. NAV and GPS are powered by the 2 Main
Boards.
The GIA 6300 is only intended for use in 28V systems, but will be required to remain “online” down to
10 VDC for 60 seconds during engine start conditions. The power supplies will be designed to allow the
units to remain fully functional with minimal exceptions
The Main A, Main B, Audio, NAV, and COM boards will have 200 ms of backup power provided by
independent banks of capacitors. Some loads and circuitry on the these boards may be shed during a
power interrupt and the COM will not transmit in order to conserve back-up power and reduce the
physical size of the capacitor banks. The backup power is only intended to ensure a short power
interruption is transparent to the rest of the system.
Function
Connector
Pins
Typical Current
@ 28V
Max Current
@ 28 V
COM
AM Rx
AM Tx
VLD Mode 2 Rx
VDL Mode 2 Tx
0.37 A
2.5 A
0.5 A
3.8 A
3.6A (3:1 VSWR)
5.0A (3:1 VSWR)
Main A 1
1.5 A
3.25 A
Main B 1
1.5 A
3.25 A
Audio
0.3 A
1.2 A
Note 1: Main A and Main B share the responsibility of powering the navigation and GPS receivers.
Typical power consumptions numbers assumed shared loading while maximum numbers assuming a
single board is powering all radios.

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Note 2: See the Environmental Qualification Form for details on surge rating and minimum/maximum
operating voltages.
7Environmental Qualifications
Reference the Environmental Qualification Form in Requiem GIA6300 EQF.
8System Interconnect
8.1 Unit Level Connections
Figure XXX shows the electrical top level design of the GIA 6300. The GIA 6300 consists of 9 separate
circuit boards and the GPS module. External interfaces are passed through the IO Board to the Main A,
Main B, COM Digital, NAV, and Audio boards.
Main A Main B NAV GlideslopeGPS
COM DigitalCOM RF Audio
IO Board
8.1.1 Main A and Main B Redundancy
Main A and Main B in the GIA6300 function as two independent units, allowing for separation and
redundancy in each GIA. Both GIA 1 and GIA 2 are connected to the sensors, but in each GIA, Main A
and Main B can be connected to a different set of sensors (i.e. Main A is connected to all primary
sensors and Main B is connected to all redundant sensors). Data is shared between the two main
boards through the inter-processor communication.
The COM Digital, NAV, and the Audio board each connect to both Main A and B so that there is
redundant communication between these components and the rest of the system. It is possible to wire
the aircraft such that a total failure of either Main A or Main B cannot cause a total loss of COM, NAV, or
Audio functionality. In the event of a single Main Board failure, the second main board would still be
capable of tuning the COM, collecting navigation data, and processing autopilot and flight director
functionality (as examples).