Garmin 01246 Users Manual

190-01122-00	TBD 2011	Rev. A

©Copyright 2011

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		RECORD OF REVISIONS
Revision	Revision Date	Description
A		Initial Release

GDL 88 TSO Installation Manual	Page A
190-01122-00	Rev. A

DOCUMENT PAGINATION

Section	Pagination
Table of Contents	i - iv
Section 1	1-1 through 1-10
Section 2	2-1 through 2-2
Section 3	3-1 through 3-4
Section 4	4-1 through 4-6
Section 5	5-1 through 5-3
Section 6	6-1 through 6-5
Section 7	7-1 through 7-2
Appendix A	A-1 through A-2
Appendix B	B-1 through B-5
Appendix C	C-1 through C-6
Appendix D	D-1 through D-7

Page B	GDL 88 TSO Installation Manual
Rev. A	190-01122-00

INFORMATION SUBJECT TO EXPORT CONTROL LAWS

This document may contain information which is subject to the Export Administration Regulations ("EAR") issued by the United States Department of Commerce (15 CFR, Chapter VII, Subchapter C) and which may not be exported, released, or disclosed to foreign nationals inside or outside of the United States without first obtaining an export license. A violation of the EAR may be subject to a penalty of up to 10 years imprisonment and a fine of up to $1,000,000 under Section 2410 of the Export Administration Act of 1979. Include this notice with any reproduced portion of this document.

WARNING

This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birth defects, or reproductive harm. This notice is being provided in accordance with California's Proposition 65. If you have any questions or would like additional information, please refer to our web site at www.garmin.com/prop65.

WARNING

Perchlorate Material – special handling may apply, See www.dtsc.ca.gov./hazardouswaste/perchlorate.

WARNING

The GDL 88 with GPS/SBAS and the GDL 88D with GPS/SBAS contains a lithium battery that must be recycled or disposed of properly. Battery replacement and removal must be performed by professional services.

GDL 88 TSO Installation Manual	Page i
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1	GENERAL DESCRIPTION ..............................................................................................................		1-1
	1.1	Introduction................................................................................................................................	1-1
	1.2	Equipment Description ..............................................................................................................	1-1
	1.3	Technical Specifications ............................................................................................................	1-2
	1.3.1	Physical Characteristics .....................................................................................................	1-2
	1.3.2	General Specifications .......................................................................................................	1-2
	1.3.3	GPS/SBAS Specifications..................................................................................................	1-3
	1.3.4	978 MHz UAT Transceiver Specifications........................................................................	1-3
	1.3.5	1030 MHz Transmitter Specifications ...............................................................................	1-4
	1.3.6	1090 MHz Receiver Specifications....................................................................................	1-4
	1.3.7	UAT/1090 Requirements ...................................................................................................	1-5
	1.3.8	GPS Antenna Requirements...............................................................................................	1-5
	1.4	License Requirements ................................................................................................................	1-6
	1.5	Regulatory Compliance..............................................................................................................	1-7
	1.5.1	TSO Authorization and Advisory Circular References......................................................	1-7
	1.5.2	Non-TSO Functions ...........................................................................................................	1-8
	1.5.3	TSO Deviations..................................................................................................................	1-9
	1.5.4	FCC Grant of Equipment Authorization ............................................................................	1-9
	1.6	Aviation Limited Warranty ......................................................................................................	1-10
2	LIMITATIONS..................................................................................................................................		2-1
	2.1	Installation..................................................................................................................................	2-1
3	INSTALLATION OVERVIEW ........................................................................................................		3-2
	3.1	Antenna Considerations .............................................................................................................	3-2
	3.1.1	GPS Antenna Location.......................................................................................................	3-2
4	INSTALLATION PROCEDURES....................................................................................................		4-1
	4.1	Unit and Accessories..................................................................................................................	4-1
	4.2	Optional Accessories..................................................................................................................	4-2
	4.2.1	GPS Antenna Options ........................................................................................................	4-2
	4.2.2	UAT Antenna Options .......................................................................................................	4-3
	4.3	Miscellaneous Options...............................................................................................................	4-3
	4.4	Installation Materials not Supplied ............................................................................................	4-3
	4.4.1	Installation Materials Required but not Supplied...............................................................	4-3
	4.5	Special Tools Required ..............................................................................................................	4-3
	4.6	Coaxial Cable Installation ..........................................................................................................	4-4
	4.7	Equipment Mounting .................................................................................................................	4-6
	4.7.1	Unit Replacement...............................................................................................................	4-6
	4.8	Antenna Installation and Connections .......................................................................................	4-6
Page ii			GDL 88 TSO Installation Manual
Rev. A			190-01122-00

5	CONNECTOR PINOUT INFORMATION.......................................................................................				5-1
	5.1	Pin Function List........................................................................................................................			5-1
	5.1.1			P881 Connector..................................................................................................................	5-1
	5.2	Power and Antennas...................................................................................................................			5-3
	5.2.1			Power .................................................................................................................................	5-3
	5.2.2			Antennas ............................................................................................................................	5-3
6 POST INSTALLATION CONFIGURATION AND CHECKOUT PROCEDURES.......................					6-4
7	PERIODIC MAINTENANCE ...........................................................................................................				7-1
	7.1	Equipment Calibration ...............................................................................................................			7-1
	7.2	Cleaning .....................................................................................................................................			7-1
	7.3	Battery Replacement ..................................................................................................................			7-1
Appendix A ENVIRONMENTAL QUALIFICATION FORM............................................................					A-1
Appendix B GDL 88 DATA FORMAT................................................................................................					B-2
Appendix C				MECHANICAL DRAWINGS .........................................................................................	C-5
Appendix D				INTERCONNECT DIAGRAMS......................................................................................	D-6
				LIST OF FIGURES
Figure 3-1.				GPS Antenna Installation Considerations ..............................................................................	3-4
Figure 4-1.				Coaxial Cable Installation ......................................................................................................	4-4
				LIST OF TABLES
Table 1-1. GDL 88 Units ..........................................................................................................................					1-1
Table 1-2. Approved GPS/SBAS Antennas..............................................................................................					1-5
Table 1-3.			TSO Authorization ..................................................................................................................		1-7
Table 1-4. Non-TSO Functions.................................................................................................................					1-8
Table 1-5.			System Functions.....................................................................................................................		1-8
Table 4-1.			Catalog Part Numbers..............................................................................................................		4-1
Table 4-2.			Standard Kit Accessories.........................................................................................................		4-1
Table 4-3. Recommended Crimp Tools (or Equivalent)...........................................................................					4-3

GDL 88 TSO Installation Manual	Page iii
190-01122-00	Rev. A

GDL 88 MOD LEVEL HISTORY

The following table identifies hardware modification (Mod) Levels for the GDL 88, GDL 88D, GDL 88 with GPS/SBAS and GDL 88D with GPS/SBAS. Mod Levels are listed with the associated

service bulletin number, service bulletin date, and the purpose of the modification. The table is current at the time of publication of this manual (see date on front cover) and is subject to change without notice. Authorized Garmin Sales and Service Centers are encouraged to access the most up-to-date bulletin and advisory information on the Garmin Dealer Resource web site at www.garmin.com using their Garminprovided user name and password.

Mod Level	Service Bulletin Number	Service Bulletin Date	Purpose Of Modification

Page iv	GDL 88 TSO Installation Manual
Rev. A	190-01122-00

1 GENERAL DESCRIPTION

1.1Introduction

This manual is applicable for GDL 88 units with software version 2.00 or later. This manual describes the physical, mechanical, and electrical characteristics, as well as instructions and other conditions and limitations for installation and approval of the GDL units. Refer to Section 2, Limitations, for additional information and other considerations.

NOTE

Except where specifically notes, references made to GDL 88 will equally apply to GDL 88 with GPS/SBAS, GDL 88D, and GDL 88D with GPS/SBAS units.

Table 1-1. GDL 88 Units

Model	Part Number
GDL 88	010-00859-00
GDL 88 with GPS/SBAS	010-00860-00
GDL 88D	010-00861-00
GDL 88D with GPS/SBAS	010-00862-00

1.2Equipment Description

The GDL 88 is a remote-mounted product that contains a 978 MHz Universal Transceiver (UAT) and a 1090 MHz receiver. The GDL 88 will transmit ownship ADS-B data via the UAT data link. It will receive data from other UAT and 1090ES equipped aircraft, as well as Flight Information Service Broadcast (FIS-B) weather. The received data may be output to an appropriate display.

The GDL 88 Series consist of four variations:

GDL 88

GDL 88, with an internal GPS/SBAS receiver

GDL 88D with dual antenna diversity

GDL 88D, with dual antenna diversity and an internal GPS/SBAS receiver

GDL 88 TSO Installation Manual	Page 1-1
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1.3Technical Specifications

1.3.1 Physical Characteristics

Table 1-2. Physical Characteristics – GDL 88 Units

Characteristics	Specifications

Height

Width

Depth (Installed with rack and connectors)

GDL 88 Weight (Unit only)

GDL 88 Weight (Installed with rack)

GDL 88 with GPS/SBAS Weight (Installed with rack)

GDL 88D Weight (Unit only)

GDL 88D Weight (Installed with rack)

GDL 88D with GPS/SBAS Weight (Unit Only)

GDL 88D with GPS/SBAS Weight (Installed with rack)

1.3.2 General Specifications

Table 1-3. General Specifications - GDL 88 Units

	Characteristics	Specifications
		-45°C to +70°C For more details see
	Operating Temperature Range	Environmental Qualification Form on the
		Dealers Only page on www.garmin.com. See
		Appendix A for part numbers.
	Humidity	95% at 65°C
	Altitude Range	50,000 ft (maximum)
	Input Voltage Range	9 to 33 VDC
	External Cooling	External fan incorporated into GDL 88
		backplate is required.
		See Environmental Qualification Form on the
	Environmental Testing	Dealers Only page on www.garmin.com. See
		Appendix A for part numbers.

Page 1-2	GDL 88 TSO Installation Manual
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1.3.3 GPS/SBAS Specifications

Table 1-4. GPS/SBAS Specifications – GDL 88 and GDL 88D with GPS/SBAS

Characteristics	Specifications
Number Of Channels	15 (12 GPS and 3 SBAS)
Frequency	1575.42 MHz L1, C/A code
Sensitivity	-134.5 dBm GPS
(Acquisition, No Interference)	-135.5 dBm WAAS
Sensitivity (Drop Lock)	-144 dBm
Dynamic Range	> 20 dB
Lat/Lon Position Accuracy	<1.25 meter RMS horizontal, <2 meter vertical, with WAAS
Velocity	1000 knots maximum (above 60,000 ft)
TTFF (Time To First Fix)	1:45 min. typical with current almanac, position, and time
Reacquisition	10 seconds typical
Position Update Interval	0.2 sec (5 Hz)
1 PPS (Pulse Per Second)	275 Nsec of UTC second
Datum	WGS-84
SATCOM Compatibility	SATCOM compatibility is dependent upon antenna selection.
Antenna Power Supply	35 mA typical, 40 mA max at 4.7 VDC

1.3.4 978 MHz UAT Transceiver Specifications

	Table 1-5. UAT Transceiver Specifications
Characteristics		Specifications
Frequency		978.00 MHz
Transmit Power		50 W (+47 dBm)
Frequency Tolerance		+ 20 PPM
Modulation		Continuous Phase FSK, h = 0.6, Raised Cosine shaping, a = 0.5
Data Rate		1.04 Mbps
99% Power Bandwidth		1.3 MHz
60 dB Bandwidth		3.3 MHz (estimated)
Receiver Sensitivity		-96 dBm for 90% MSR

GDL 88 TSO Installation Manual	Page 1-3
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1.3.5 1030 MHz Transmitter Specifications

	Table 1-6. Transmitter Specifications
Characteristics		Specifications
Frequency		1030 MHz
Transmit Power		-29 dBm
Frequency Tolerance		+ 20 kHz

1.3.6 1090 MHz Receiver Specifications

	Table 1-7. Receiver Specifications
Characteristics		Specifications
Frequency		1090 MHz
Frequency Tolerance		+ 1 MHz
Modulation		Binary Pulse-Position
Data Rate		1 Mbps
Sensitivity		-82 dBm for 90% MSR

Page 1-4	GDL 88 TSO Installation Manual
Rev. A	190-01122-00

1.3.7 UAT/1090 Requirements

The GDL 88 requires UHF antenna(s) meeting the following specifications:

Vertically polarized

The VSWR produced by the antenna does not exceed 1.7:1 at 978 MHz and 1.5:1 at 1090 MHz.

TSO-C66, TSO-C74, or TSO-C112 antennas that also meet the VSWR specification.

NOTE

Certain types of transponder antennas that utilize very thin radiator elements are only intended for use at 1030 and 1090 MHz. These types of antennas should be evaluated on a model-by-model basis to determine their suitability as UAT data link antennas.

CAUTION

Operating the GDL 88 without RF terminations on the top or bottom UAT antenna ports can result in equipment damage. Always operate the GDL 88 with the top and bottom

UAT antenna ports terminated with a VSWR ration of 3.0:1 or less.

1.3.8 GPS Antenna Requirements

Antenna performance is critical to the GPS/SBAS operation. The antennas listed in Table 1-8 provide acceptable performance with the GDL 88.

Table 1-8. Approved GPS/SBAS Antennas

						Garmin
	Model/Description	Conn Type	Mfr	Part Number		Order
						Number
	GA 35, GPS/WAAS	TNC	Garmin	013-00235-(	)	013-00235-( )
	[1]		Aero Antenna	AT575-93G( )-TNCF-000-RG-27-NM
	GA 36, GPS/WAAS	TNC	Garmin	013-00244-(	)	013-00244-( )
			Aero Antenna	AT575-126G( )-TNCF-000-RG-27-NM
	GA 37, GPS/WAAS/XM	TNC	Garmin	013-00245-(	)	013-00245-( )
			Aero Antenna	AT2300-126G( )-TNCF-000-RG-27-NM
	A33W, WAAS Antenna	TNC	Garmin	013-00261-(	)	013-00261-( )
			Aero Antenna	AT575-332G( )- TNCF-000-RG-27-NM
	GPS/VHF Antenna	TNC/BNC	Comant	CI-2580-200		N/A
		[2]
	GPS/VHF Antenna	TNC/BNC	Comant	CI-2728-200		N/A
		[2]
	GPS/XM/VHF Antenna	TNC/TNC/BNC	Comant	CI-2580-410		N/A
		[3]
	GPS/XM/VHF Antenna	TNC/TNC/BNC	Comant	CI-2728-410		N/A
		[3]
	GPS/WAAS Antenna	TNC	Comant	CI-428-200		N/A
	GPS/XM Antenna	TNC/TNC	Comant	CI-428-410		N/A

[1]Same mounting hole pattern as GA 56, but GA 35 antenna has a physically larger footprint.

[2]The antenna connector is a TNC type. The VHF connector is a BNC type.

[3]The antenna connector is a TNC type. The XM connector is a TNC type. The VHF connector is a BNC type.

GDL 88 TSO Installation Manual	Page 1-5
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1.4License Requirements

The Telecommunications Act of 1996, effective February 8, 1996, provides the FCC discretion to eliminate radio station license requirements for aircraft and ships. The GTN 750 installations must comply with current transmitter licensing requirements. In the US, to find out the specific details on whether a particular installation is exempt from licensing, please visit the FCC web site http://wireless.fcc.gov/aviation. If an aircraft license is required, make application for a license on FCC form 404, Application for Aircraft Radio Station License. The FCC also has a fax-on-demand service to provide forms by fax. Outside the US, contact the responsible telecommunication authority. The

GTN 750 owner accepts all responsibility for obtaining the proper licensing before using the transceiver. The maximum transmitting power, modulation identification, and frequency band information may be required for licensing and are detailed in Section 1.4.4.

CAUTION

The VHF transmitter in this equipment is guaranteed to meet Federal Communications Commission acceptance over the operating temperature range. Modifications not expressly approved by Garmin could invalidate the license and make it unlawful to operate the equipment.

NOTE

Canadian installations are required to meet Industry Canada specifications for maximum radiation as documented in Radio Specifications Standard 102 (RSS-102). For more information about RF exposure and related Canadian regulatory compliance, contact:

Manager, Radio Equipment Standards Industry Canada

365 Laurier Avenue Ottawa, Ontario K1A 0C8

In accordance with Canadian Radio Specifications Standard 102 (RSS 102), RF field strength exposure to persons from an antenna connected to this device should be limited to 60V/m for controlled environment and 28 V/m for uncontrolled environment.

Page 1-6	GDL 88 TSO Installation Manual
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