Garmin 0060200 AIRCRAFT MOUNTED WEATHER RADAR TRANSMITTER User Manual Cover Rev1
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Contents
- 1. PILOT MANUAL
- 2. INSTALLATION MANUAL
INSTALLATION MANUAL
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Garmin Ltd. or its subsidiaries
c/o Garmin International, Inc.
1200 E. 151st Street
Olathe, Kansas 66062 U.S.A.
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GWX 68 Installation Manual
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GWX 68 Installation Manual
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1 5/12/05 Preliminary Release ---------
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GWX 68
Installation Manual
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Garmin P/N 190-00286-01 May, 2005 Preliminary Revision 1
Preliminary
GWX 68
Installation Manual
Page A GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
© Copyright 2005
Garmin Ltd. or its subsidiaries
All Rights Reserved
Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted,
disseminated, downloaded or stored in any storage medium, for any purpose without the express prior
written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual
and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed and
to print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of
this manual or revision must contain the complete text of this copyright notice and provided further that
any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.
Garmin International, Inc.
1200 E. 151st Street
Olathe, KS 66062 USA
Telephone: 913-397-8200
Aviation Dealer Technical Support Line (Toll Free): (888) 606-5482
www.garmin.com
Garmin (Europe) Ltd.
Unit 5, The Quadrangle
Abbey Park Industrial Estate
Romsey, SO51 9DL U.K.
44/0870.851241
RECORD OF REVISIONS
Revision Revision
Date
Description ECO #
1 5/12/05 Initial Release --------
DOCUMENT PAGINATION
Section Page Range
Table of Contents i - vi
Section 1 1-1 – 1-6
Section 2 2-1 – 2-2
Section 3 3-1 – 3-10
Section 4 4-1 – 4-4
Appendix A A-1 – A-2
Appendix B B-1 – B-8
GWX 68 Installation Manual Page i
190-00286-01 Preliminary Revision 1
This manual reflects the operation of software version TBD. Some differences in operation may be
observed when comparing the information in this manual to earlier or later software versions.
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
This radar device produces microwave radiation.
DO NOT OPERATE THIS DEVICE UNTIL ALL SAFETY
PRECAUTIONS AND INSTRUCTIONS IN THE
OPERATING AND INSTALL MANUALS HAVE BEEN
READ.
IMPROPER USE OR EXPOSURE MAY RESULT IN
BODILY INJURY.
CAUTION
All personnel should remain the prescribed “safe distance”
from this radar.
Never expose any part of the body to an unterminated
waveguide.
Page ii GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
SAFE DISTANCE DETERMINATION
The following information establishes a minimum safe distance from the antenna for personnel near an
operating airborne weather radar. The minimum safe distance is based upon the FCC’s exposure limit at
9.3 to 9.5 GHz for general population/uncontrolled environments which is 1 mW/cm2. See AC 20-68B
for more information on safe distance determination.
Antenna Size Safe Distance
10” 9.16 ft
12” 10.8 ft
MAXIMUM PERMISSIBLE EXPOSURE LEVEL (MPEL)
The zone in which the radiation level exceeds the US Government standard of 1 mW/cm2, is the semi-
circular area of at least 9.16 ft from the 10” antenna and 10.83 ft from the 12” antenna as indicated in the
illustration below. All personnel must remain outside of this zone. The distance to the MPEL boundary
is calculated upon the basis of each antenna available with the GWX 68 system, rated output power of the
transmitter, and in the non-rotating or boresight position of the antenna (see example calculations above).
With a scanning or rotating beam, the averaged power density at the MPEL boundary is significantly
reduced.
MPEL
Boundary
Radome
Center Line of
A
ircraft
10.83 ft for 12” ant
9.16 ft for 10” ant
A
ntenna
GWX 68 Installation Manual Page iii
190-00286-01 Preliminary Revision 1
GENERAL PRECAUTIONS
Airborne weather radar should be operated on the ground only by qualified personnel.
Installed airborne radar should not be operated while the aircraft is in a hanger or other enclosure unless
the radar transmitter is not operating, or the energy is directed toward an absorption shield which
dissipates the radio frequency energy. Otherwise, radiation within the enclosure can be reflected
throughout the area.
BODY DAMAGE
To prevent possible human body damage, the following precautions should be taken:
1. Personnel should never stand nearby and in front of a radar antenna which is transmitting. When the
antenna is not scanning, the danger increases.
2. The recommended safe distance which is established above should be followed. The distance from
any person to the radar should be greater than that distance.
3. Personnel should be advised to avoid the end of an open waveguide unless the radar is turned off.
4. Personnel should be advised to avoid looking into a waveguide, or into the open end of a coaxial
connector or line connector to a radar transmitter output, as severe eye damage may result.
5. Personnel should be advised that when high power radar transmitters are operated out of their
protective cases, X-rays may be emitted. Stray X-rays may emanate from the glass envelope type
pulser, oscillator, clipper, or rectifier tubes, as well as magnetrons.
COMBUSTIBLE MATERIALS
To prevent possible fuel ignition, an installed airborne weather radar should not be operated while an
aircraft is being refueled or defueled.
Page iv GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
TABLE OF CONTENTS
PARAGRAPH PAGE
1 GENERAL DESCRIPTION..............................................................................................................1-1
1.1 Introduction........................................................................................................................................1-1
1.2 Equipment Description ......................................................................................................................1-1
1.3 Interface Summary.............................................................................................................................1-1
1.4 Technical Specifications ....................................................................................................................1-1
1.5 License Requirements........................................................................................................................1-3
1.6 Certification .......................................................................................................................................1-4
1.7 Reference Documents ........................................................................................................................ 1-4
1.8 Limited Warranty...............................................................................................................................1-5
2 INSTALLATION OVERVIEW ........................................................................................................2-1
2.1 Introduction........................................................................................................................................2-1
2.2 Installation Materials .........................................................................................................................2-1
2.3 Installation Considerations ................................................................................................................2-1
2.4 Cabling and Wiring............................................................................................................................2-2
2.5 Cooling Requirements .......................................................................................................................2-2
2.6 Mounting Requirements ....................................................................................................................2-2
3 INSTALLATION PROCEDURE......................................................................................................3-1
3.1 Unpacking Unit..................................................................................................................................3-1
3.2 Wiring Harness Installation ...............................................................................................................3-1
3.3 Backshell Assemblies and D-Subminiature Connectors....................................................................3-2
3.4 Unit Installation ...............................................................................................................................3-10
3.5 Post Installation Configuration & Checkout....................................................................................3-10
3.6 Continued Airworthiness .................................................................................................................3-10
4 SYSTEM INTERCONNECTS..........................................................................................................4-1
4.1 Pin Function List................................................................................................................................4-1
4.2 Power .................................................................................................................................................4-2
4.3 Serial Data .........................................................................................................................................4-3
4.4 Configuration.....................................................................................................................................4-3
4.5 Auto Pilot...........................................................................................................................................4-3
APPENDIX A: OUTLINE & INSTALLATION DRAWINGS.............................................................. A-1
APPENDIX B: INTERCONNECT EXAMPLE....................................................................................... B-1
GWX 68 Installation Manual Page v
190-00286-01 Preliminary Revision 1
LIST OF ILLUSTRATIONS
FIGURE PAGE
3-1 Shield Block Install onto Backshell Connector Assembly ................................................................3-3
3-2 Shielded Cable Preparation................................................................................................................3-4
3-3 Daisy Chain Method for Shield Termination.....................................................................................3-7
3-4 Parallel Shield Termination ...............................................................................................................3-8
3-5 Configuration Module Installation.....................................................................................................3-9
A-1 GWX 68 Outline Drawing................................................................................................................A-1
B-1 GWX 68 Typical G1000 Interconnect Wiring Diagram................................................................... B-1
B-2 GWX 68 Typical MX20 Interconnect Wiring Diagram ................................................................... B-3
B-3 GWX 68 Analog Stabilization Interconnect Wiring Diagram.......................................................... B-5
B-4 GWX 68 AHRS Stabilization Interconnect Wiring Digram............................................................. B-7
LIST OF TABLES
TABLE PAGE
3-1 Pin Contact Part Numbers..................................................................................................................3-1
3-2 Recommended Crimp Tools ..............................................................................................................3-1
3-3 Backshell Assembly...........................................................................................................................3-2
3-4 Shield Block Components .................................................................................................................3-3
3-5 Shielded Cable Preparation................................................................................................................3-4
3-6 Configuration Module Kit – 011-00979-00.......................................................................................3-8
3-7 Configuration Module Wire Color Reference Chart..........................................................................3-9
Page vi GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
GWX 68 HARDWARE MOD LEVEL HISTORY
The following table identifies hardware modification (Mod) Levels for the GWX 68. 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 Garmin-provided user name and password.
MOD
LEVEL
SERVICE
BULLETIN
NUMBER
SERVICE
BULLETIN
DATE
PURPOSE OF MODIFICATION
GWX 68 Installation Manual Page 1-1
190-00286-01 Preliminary Revision 1
1 GENERAL DESCRIPTION
1.1 Introduction
This manual presents mechanical and electrical installation requirements for installing the GWX 68
Airborne Weather Radar.
NOTE
The ability of a weather radar system to accurately display weather returns is highly
dependent upon the quality of the radome and its Transmission Efficiency. The specified
performance of the GWX 68 Airborne Weather Radar can be achieved when installed
behind a DO-213 Class A Radome within the RF window defined as +-45 degrees from
dead ahead in azimuth and +-15 degrees from dead ahead in elevation. Refer to RTCA
document DO-213 Class A for minimum operational performance standards for nose
mounted radomes.
1.2 Equipment Description
The GWX 68 Airborne Weather Radar is a microprocessor-based Line Replaceable Unit (LRU) that
outputs weather radar data to an external MFD. The GWX 68 communicates with other LRUs via
ARINC 429/453 and/or Ethernet high speed data bus (HSDB).
CAUTION
The operation of ground-based cellular telephones or other ground-based cellular devices
aboard aircraft while airborne is prohibited by FCC rules. Due to the potential for
interference with onboard systems, the operation of ground-based cellular communication
devices while onboard an aircraft that is on the ground is subject to FAA regulations 14
CFR 91.21.
FCC regulation 47 CFR 22.925 prohibits airborne operation of ground-based cellular
telephones installed in or carried aboard aircraft. Ground-based cellular telephones must
not be operated aboard any aircraft while the aircraft is off the ground. When any aircraft
leaves the ground, all ground-based cellular telephones on board that aircraft must be
turned off.
Ground-based cellular telephones that are on, even in a monitoring state, can disrupt GPS
performance.
1.3 Interface Summary
The GWX 68 is designed as an open architecture system that uses typical ARINC 429, ARINC 453, and
Ethernet communications interfaces.
1.4 Technical Specifications
1.4.1 Environmental Qualification Form
It is the responsibility of the installing agency to obtain the latest revision of the GWX 68 Environmental
Qualification Form. This form is available directly from Garmin under the following part number:
GWX 68 Environmental Qualification Form, Garmin part number 005-00171-00
To obtain a copy of this form, see the dealer/OEM portion of the Garmin web site (www.garmin.com).
Page 1-2 GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
1.4.2 Physical Characteristics
Characteristics Specifications
Unit Size See Figure A-1. GWX 68 Outline Drawing
Unit weight 10" – 9.0 lbs (4.08 kg)
12" – 9.1 lbs (4.13 kg)
1.4.3 General Specifications
The table below contains general environmental specifications. For detailed specifications, see the
Environmental Qualification Form (005-00171-00).
Characteristics Specifications
Operating Temperature Range -55°C to +70°C. For more details see Environmental
Qualification Form.
Humidity 95% non-condensing
Altitude Range -1,500 ft to 50,000 ft
1.4.4 Performance Specifications
Characteristics Specifications
Display Colors 4 Colors
Selectable Ranges 2.5, 5, 10, 20, 40, 80, 160, 320nm
Weather Avoidance Range 305nm w/ 12” Ant.
270nm w/ 10” Ant.
Performance Index 213dB w/ 12” Ant.
210dB w/ 10” Ant.
Rx Sensitivity -110 dBm MDS
Manual Gain +12 to –64dB
Antenna Beamwidth 7.8° w/ 12” Ant.
9.0° w/ 10” Ant.
Magnetron Power 6.5kW nominal
5kW minimum
Pulse Width 1 or 4 µS
Scan Angle Pilot adjustable – 20, 40, 60 or 90°
Scan Centerline Pilot adjustable
Scan Rate 12 looks/minute
Manual Tilt ±15°
Stabilization ±30° combined pitch and roll
Altitude 50k Ft unpressurized
STC Effective to 80nm
Extended STC 80nm to 320nm
Interface Garmin HSDB/ARINC 429/ARINC 453
GWX 68 Installation Manual Page 1-3
190-00286-01 Preliminary Revision 1
1.4.5 Power Requirements
Characteristics Specifications
Input Voltage Range 14/28 Vdc See the Environmental Qualification Form for
details on surge ratings and minimum/maximum operating
voltages.
Input Current 2A @ 28V, maximum
1.5 License 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 GWX 68 installation must comply
with current transmitter licensing requirements. 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. The
GWX 68 owner accepts all responsibility for obtaining the proper licensing before using the transponder.
CAUTION
The transmitter in this equipment is guaranteed to meet Federal Communications
Commission acceptance over the specified operating temperature range. Modifications to
Garmin equipment not expressly approved by Garmin could invalidate the license and
make it unlawful to operate the equipment.
Page 1-4 GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
1.6 Certification
The conditions and tests required for TSO approval of this article are minimum performance standards. It
is the responsibility of those installing this article either on or within a specific type or class of aircraft to
determine that the aircraft installation conditions are within the TSO standards. TSO articles must have
separate approval for installation in an aircraft. The article may be installed only if performed under 14
CFR part 43 or the applicable airworthiness requirements. At the time of publication, installations of this
TSO approved article are only approved when installed in an aircraft as part of a Garmin G1000 system.
1.6.1 TSO/ETSO Compliance
TSO-C63c Class 7
1.7 Reference Documents
The following publications are sources of additional information for installing the GWX 68. Before
installing the GWX 68, the technician should read all referenced materials along with this manual.
Part Number Document
190-00303-00 G1000 System Installation Manual
560-1025-09 MX20 Multi-Function Display Installaltion Manual
GWX 68 Installation Manual Page 1-5
190-00286-01 Preliminary Revision 1
1.8 Limited Warranty
This Garmin product is warranted to be free from defects in materials or workmanship for two years from
the date of purchase. Within this period, Garmin will at its sole option, repair or replace any components
that fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts or
labor, provided that the customer shall be responsible for any transportation cost. This warranty does not
cover failures due to abuse, misuse, accident or unauthorized alteration or repairs.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF
ALL OTHER WARRANTIES EXPRESS OR IMPLIED OR STATUTORY, INCLUDING ANY
LIABILITY ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU
SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM STATE TO STATE.
IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR
CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE, OR
INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT. Some states do not
allow the exclusion of incidental or consequential damages, so the above limitations may not apply to
you.
Garmin retains the exclusive right to repair or replace the unit or software or offer a full refund of the
purchase price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE
REMEDY FOR ANY BREACH OF WARRANTY.
To obtain warranty service, contact your local Garmin Authorized Service Center. For assistance in
locating a Service Center near you, call Garmin Customer Service at one of the numbers shown below.
Products sold through online auctions are not eligible for rebates or other special offers from Garmin.
Online auction confirmations are not accepted for warranty verification. To obtain warranty service, an
original or copy of the sales receipt from the original retailer is required. Garmin will not replace missing
components from any package purchased through an online auction.
Garmin International, Inc. Garmin (Europe) Ltd.
1200 East 151st Street Unit 5, The Quadrangle, Abbey Park Industrial Estate
Olathe, Kansas 66062, U.S.A. Romsey, SO51 9DL, U.K.
Phone: 913/397.8200 Phone: 44/0870.851241
FAX: 913/397.8282 FAX: 44/0870.851251
Page 1-6 GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
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GWX 68 Installation Manual Page 2-1
190-00286-01 Preliminary Revision 1
2 INSTALLATION OVERVIEW
2.1 Introduction
This section provides hardware equipment information for installing the GWX 68, related hardware, and
antennas. Installation of the GWX 68 should follow the aircraft TC or STC requirements. Cabling is
fabricated by the installing agency to fit each particular aircraft. The final installation must meet the
requirements of FAA AC 43.13-1B and AC 43.13-2A.
2.2 Installation Materials
The GWX 68 is available under the following part number:
Item Catalog P/N
GWX 68 Unit Only, (011-00883-00) 010-00299-00
GWX 68 Standard, (011-00883-00) * 010-00300-00
*Includes installation kit (011-01114-00).
2.3 Installation Considerations
Fabrication of a wiring harness is required. Sound mechanical and electrical methods and practices are
required for installation of the GWX 68.
2.3.1 Antenna Considerations
Antenna installations on pressurized cabin aircraft require FAA approved installation design and
engineering substantiation data whenever such antenna installations incorporate alteration (penetration) of
the cabin pressure vessel by connector holes and/or mounting arrangements. For needed engineering
support pertaining to the design and approval of such pressurized aircraft antenna installations, it is
recommended that the installer proceed according to any of the following listed alternatives:
1. Obtain approved antenna installation design data from the aircraft manufacturer.
2. Obtain an FAA approved STC, pertaining to, and valid for the antenna installation.
3. Contact the FAA Aircraft Certification Office in the appropriate Region and request identification
of FAA Designated Engineering Representatives (DERs) who are authorized to prepare and
approve the required antenna installation engineering data.
4. Obtain FAA Advisory Circular AC-183C and identify a DER from the roster of individuals in it.
5. Contact an aviation industry organization such as the Aircraft Electronics Association for
assistance.
Page 2-2 GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
2.4 Cabling & Wiring
Use AWG #24 or larger wire for all connections unless otherwise specified by the aircraft manufacturer
or Garmin. The standard pin contacts supplied in the connector kit are compatible with up to AWG #22
wire. In cases where some installations have more than one unit sharing a common circuit breaker, sizing
and wire gauge is based on aircraft circuit breaker layout, length of wiring, current draw of units, and
internal unit protection characteristics. Do not attempt to combine more than one unit on the same circuit
breaker unless it is specified on aircraft manufacturer approved drawings.
In these cases, a larger gauge wire such as AWG #18 or #16 may be needed for power connections. The
provided connector kit supplies extended barrel contacts for AWG #16 and #18 wire, if required. Special
thin-wall heat shrink tubing is also provided to insulate the extended barrels inside the backshell. If using
AWG #16 or #18 barrel contacts, ensure that no two contacts are mounted directly adjacent to each other.
This minimizes the risk of contacts touching and shorting to adjacent pins and to ground.
Ensure that routing of the wiring does not come in contact with sources of heat, RF or EMI interference.
Check that there is ample space for the cabling and mating connectors. Avoid sharp bends in cabling and
routing near aircraft control cables.
2.5 Cooling Requirements
The GWX 68 does not have provisions for attaching cooling air and does not generate an excessive
amount of heat during typical operations, however thermal characteristics of the installation should
always be assessed. An undesirable thermal condition could be created due to the unit’s own internal
power dissipation combined with restricted ventilation, or due to heat generated by adjacent equipment.
Limiting thermal build up, by means of fan or natural convection is always good practice and
recommended to increase the product life.
2.6 Mounting Requirements
The GWX 68 mounting surface must be capable of providing structural support and electrical bond to the
aircraft to minimize radiated EMI and provide protection from High-Intensity Radiation Fields (HIRF).
GWX 68 Installation Manual Page 3-1
190-00286-01 Preliminary Revision 1
3 INSTALLATION PROCEDURE
3.1 Unpacking Unit
Carefully unpack the equipment and make a visual inspection of the unit for evidence of damage incurred
during shipment. If the unit is damaged, notify the carrier and file a claim. To justify a claim, save the
original shipping container and all packing materials. Do not return the unit to Garmin until the carrier
has authorized the claim.
Retain the original shipping containers for storage. If the original containers are not available, a separate
cardboard container should be prepared that is large enough to accommodate sufficient packing material
to prevent movement of the item within the container.
3.2 Wiring Harness Installation
Allow adequate space for installation of cables, connectors, and strain relief as necessary. The installer
shall supply and fabricate all of the cables. All wiring must be in accordance with FAA AC 43.13-1B.
All electrical connections are made through a 44-pin D subminiature connector. Section 4 defines the
electrical characteristics of all input and output signals. Required connectors and associated hardware are
supplied with the connector kit.
See Appendix C for examples of interconnect wiring diagrams. Construct the actual harnesses in
accordance with aircraft manufacturer authorized interconnect standards.
Table 3-1. Pin Contact Part Numbers
44 pin D-Subminiature connector (P400)
Manufacturer 16 AWG
(Power Only)
18 AWG
(Power Only)
20 AWG 22-28 AWG
Garmin P/N 336-00044-01 336-00044-00 336-00044-02 336-00021-00
Military P/N N/A N/A N/A M39029/58-360
AMP N/A N/A N/A 204370-2
Positronic N/A N/A N/A MC8522D
ITT Cannon N/A N/A N/A 030-2042-000
Table 3-2. Recommended Crimp Tools
16, 18 & 20 AWG 22-28 AWG
Manufacturer Hand
Crimping Tool Positioner Insertion/
Extraction
Tool
(note 2)
Positioner Insertion/
Extraction
Tool
Military P/N M22520/2-01 N/A M81969/1-04 M22520/2-09 M81969/1-04
Positronic 9507 9502-11 M81969/1-04 9502-3 M81969/1-04
ITT Cannon 995-0001-584 N/A N/A 995-0001-739 N/A
AMP 601966-1 N/A 91067-1 601966-6 91067-1
Daniels AFM8 K774 M81969/1-04 K42 M81969/1-04
Astro 615717 N/A M81969/1-04 615725 M81969/1-04
Page 3-2 GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
NOTES
1. Non-Garmin part numbers shown are not maintained by Garmin and consequently are subject
to change without notice.
2. Extracting the #16, #18 and #20 contact requires that the expanded wire barrel be cut off from
the contact. It may also be necessary to push the pin out from the face of the connector when
using an extractor due to the absence of the wire. A new contact must be used when
reassembling the connector.
3.3 Backshell Assembly and D-Subminiature Connectors
The GWX 68 connector kit (011-01114-00) includes one Garmin backshell assembly. Garmin’s
backshell connectors give the installer the ability to quickly and easily terminate shield grounds at the
backshell housing using the Shield Block ground kit. The term ‘D-Sub’ (D-Subminiature) connectors
have a letter “D” physical shape. D-Sub refers only to the polarized shell that holds the contacts (pins or
sockets) in place. Table 3-3 lists Garmin part numbers for the GWX 68 D-Sub Connectors and the
Backshell Assembly.
Table 3-3. Backshell Assembly
Figure Ref Description Garmin P/N
1 Cast Housing (From Garmin Backshell kit.) 125-00085-00
2 Shield block 117-00147-xx
3Screw, 4-40 x.250, FLHP100°, SS/P, Nylon. 211-63234-08
4Multiple Conductor Shielded Cable
(See Interconnect Diagrams, Appendix C)
As Required
5 Shield Termination As Required
6 Braid, Flat (19 – 20 AWG equivalent, tinned
plated copper strands 36 AWG, Circular Mil
Area 1000 – 1300)
As Required
7 Shrink Tubing As Required
8 Pins 336-00021-00
9Ring terminal, #8, insulated, 18-22 AWG,
14-16 AWG, 10-12 AWG
MS25036-149,
MS25036-153,
MS25036-156
10 Screw, PHP, 8-32x.312", Stainless or Cad
Plated Steel
MS51957-42,
MS35206-242
11 Split Washer, #8, (.045" compressed
thickness) Stainless or Cad-plated steel
MS35338-137,
MS35338-42
12 Flat Washer, #8, .032" thick, .174"ID, .375"
OD, Stainless or Cad Plated Steel
NAS1149CN832R,
NAS1149FN832P
13 Silicon Fusion Tape 249-00114-00
14 Strain Relief 115-00499-xx
15 Screw,4-40x.375,PHP,SS/P,w/Nylon 211-60234-10
16 Lid 115-00500-xx
17 Screw,4-40x.187,FLHP100,SS/P,w/Nylon 211-63234-06
GWX 68 Installation Manual Page 3-3
190-00286-01 Preliminary Revision 1
3.3.1 Shield Block Assembly Procedure
The parts for the connector and backshell assembly, GWX68 installations, are listed in Table 3-3 and
shown in Figure 3-1.
Figure 3-1. Shield Block Install onto Backshell Connector Assembly
Table 3-4. Shield Block Components
Backshell Assembly
Garmin P/N
Shield Block
Garmin P/N
011-00950-12
(25/44 Pin High Density)
011-01169-01
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Preliminary Revision 1 190-00286-01
1. Attach the Shield Block(s) (2) to the backshell (1) by inserting the flathead screws (3) through the
holes on the Shield Block and threading into the tapped holes on the backshell (1). (See Figure 3-1).
The appropriate number of Shield Block kits is included in the GWX 68 connector kit.
Table 3-5. Shielded Cable Preparation
Float
Min
Float
Max
Ideal
Float
Window
Min
Window
Max
Ideal
Window
1.5” 2.5” 2.0” 3.0” 5.5” 4.5”
Figure 3-2. Shielded Cable Preparation
2. At one end of a shielded cable (4) measure back a distance between “Window Min” to “Window
Max” (Table 3-5) and cut a window (max size 0.35”) in the jacket to expose the shield. (See Figure
3-2). Use caution when cutting the jacket to avoid damaging the individual braids of the shield.
When dealing with a densely populated connector with many cables it may prove beneficial to stagger
the windows throughout the “Window Min” to “Window Max” range. If staggering is not needed the
“Ideal Window” length is recommended.
Tools needed to Accomplish the Window Cut:
• Coaxial Cable Stripper
• Thermal Stripper
• Sharp Razor Blade
3. Connect a Flat Braid (6) to the shield exposed through the window of the prepared cable assembly
(4). The Flat Braid goes out the front of the termination towards the connector. Do not allow wires
to exit the rear of the termination and loop back towards the connector. (See Figure 3-2). Make this
connection using an approved shield termination technique. Refer to FAA Advisory Circular AC
43.13 as a reference for termination techniques.
GWX 68 Installation Manual Page 3-5
190-00286-01 Preliminary Revision 1
Preferred Method, Solder Sleeves:
Slide a solder sleeve (5) onto the prepared cable assembly (4) and connect the Flat Braid (6) to the shield
using a heat gun approved for use with solder sleeves. It may be easier to use a solder sleeve with a pre-
installed Flat Braid versus having to cut a length of Flat Braid to be used. The chosen size of solder
sleeve must accommodate both the number of conductors present in the cable and the Flat Braid (6) to be
attached.
NOTE
Solder Sleeves with pre-installed Flat Braid: A preferred solder sleeve
is the Raychem S03 Series with the thermochromic temperature
indicator. These solder sleeves come with a pre-installed braid and
effectively take the place of items 5 and 6. For detailed instructions on
product use, refer to Raychem installation procedure RCPS 100-70.
Raychem Recommended Heating Tools:
• HL1802E
• AA-400 Super Heater
• CV-1981
• MiniRay
• IR-1759
Individual Solder Sleeves and Flat Braid
Solder Sleeves:
Reference the following MIL-Specs for general solder sleeves:
(M83519/1-1, M83519/1-2, M83519/1-3, M83519/1-4, M83519/1-5).
Flat Braid:
If the preferred Raychem sleeves are not being used, the individual flat braid selected should conform to
ASTMB33 for tinned copper and be made up of 36 AWG strands to form an approximately 19-20 AWG
equivalent flat braid. A circular mil area range of 1000 to 1300 is required. The number of individual
strands in each braid bundle is not specified.
NOTE
Flat Braid as opposed to insulated wire is specified in order to insure
continuing airworthiness by allowing for visual inspection of the
conductor.
Page 3-6 GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
Secondary Method, Heat Shrink instead of Solder Sleeves:
Solder a Flat Braid (6) to the shield exposed through the window of the prepared cable assembly (4).
Ensure a solid electrical connection through the use of acceptable soldering practices. Use care to avoid
applying excessive heat that burns through the insulation of the center conductors and shorts the shield to
the signal wire. Slide a minimum 0.75” of Teflon heat shrinkable tubing (5) onto the prepared wire
assembly and shrink using a heat gun. The chosen size of heat shrinkage tubing must accommodate both
the number of conductors present in the cable and the Flat Braid (6) to be attached.
4. At the same end of the shielded cable (4) and ahead of the previous shield termination, strip back
“Float Min” to “Float Max” (Table 3-5) length of jacket and shield to expose the insulated center
conductors. (See Figure 3-2). It may be best to build the “Ideal Float” length optimally.
Preferred Method:
The jacket and shield should be cut off at the same point so no shield is exposed. Slide 0.75” minimum of
Teflon heat shrinkable tubing (7) onto the cable and use a heat gun to shrink the tubing. The chosen size
of heat shrinkage tubing must accommodate the number of conductors present in the cable
Secondary Method:
Leave a max 0.35” of shield extending past the jacket. Fold this 0.35” of shield back over the jacket.
Slide a solder sleeve (7) over the end of the cable and use a heat gun approved for solder sleeves to secure
the connection. The chosen size of solder sleeve must accommodate the number of conductors present in
the cable.
5. Strip back 1/8” of insulation and crimp a pin (8) to each of the conductors in the shielded cable.
6. Insert newly crimped pins and wires into the appropriate connector housing location as specified by
the installation wiring diagrams.
7. Cut the Flat Braid (6) to a length with the addition of a ring terminal that will reach one of the tapped
holes of the Shield Block (2). (See Figure 3-1). An appropriate amount of excess length without
looping should be given to the Flat Braid (6) to allow it to move freely with the wire bundle. Note
that the maximum distance from the backshell allowed for the window splice should keep the Flat
Braid (6) to a worst case length of approximately 4”.
GWX 68 Installation Manual Page 3-7
190-00286-01 Preliminary Revision 1
8. Guidelines for terminating the newly cutoff Flat Braid(s) (item 6) with insulated ring terminals (9):
• Each tapped hole on the Shield Block (2) may accommodate only two ring terminals (9).
• It is preferred that only two Flat Braids (6) be terminated per ring terminal. Two Flat Braids per
ring terminal will necessitate the use of a Ring terminal, #8, insulated, 14-16 AWG
(MS25036-153).
• If only a single Flat Braid is left or if only a single Flat Braid is need for this connector, a Ring
terminal, #8, insulated, 18-22 AWG (MS25036-149) can accommodate this single Flat Braid.
• If more braids exist for this connector than two per ring terminal, it is permissible to terminate
three braids per ring terminal. This will necessitate the use of a Ring terminal, #8, insulated,
10-12 AWG (MS25036-156).
• In rare situations where more braids need to be terminated for this connector than three per ring
terminal it is allowable to daisy chain a maximum of two shields together before coming to the
ring terminal. (See Figure 3-3).
•
Figure 3-3: Daisy Chain Method for Shield Termination
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Preliminary Revision 1 190-00286-01
9. Repeat steps 2 through 8 as needed for the remaining shielded cables.
10. Terminate the ring terminals to the Shield Block (2) by placing items on the Pan Head Screw (10) in
the following order: Split Washer (11), Flat Washer (12), first Ring Terminal, second Ring Terminal
if needed, before finally inserting the screw into the tapped holes on the Shield Block. Do not violate
the guidelines presented in Step 8 regarding ring terminals.
11. It is recommended to wrap the cable bundle with Silicone Fusion Tape (13) (GPN: 249-00114-00 or a
similar version) at the point where the backshell strain relief and cast housing will contact the cable
bundle. Note: Choosing to use this tape is at the discretion of the installer.
12. Place the smooth side of the backshell strain relief (14) across the cable bundle and secure using the
three screws (15). Warning: Placing the grooved side of the strain relief across the cable bundle may
risk damage to wires.
13. Attach the cover (16) to the backshell (1) using two screws (17).
9
6
5
7
Figure 3-4: Parallel Shield Termination
3.3.2 Configuration Module Installaltion (MX20 only)
Table 3-6 lists part numbers for the Configuration Module Kit.
Table 3-6. Configuration Module Kit – 011-00979-00
Item Description Garmin P/N
Configuration Module PCB Board Assembly w/EEPROM 012-00605-00
Cable 4-Conductor Harness 325-00122-00
Crimp Pins #22 AWG (HD) 336-00021-00
Spacer Spacer, Config Module 213-00043-00
GWX 68 Installation Manual Page 3-9
190-00286-01 Preliminary Revision 1
3.3.3 Configuration Module Assembly Procedure (MX20 only)
Table 3-7. Configuration Module Wire Color Reference Chart
Color Function J400 Pin
Black Ground 1
Red Vcc 17
Yellow Data 16
White Clock 31
1. Crimp pins (4) onto each wire of the four-conductor wire harness (3). Strip 1/8” of insulation
from each wire prior to crimping.
2. Insert newly crimped pins and wires (3, 4) into the appropriate connector housing (5) location
shown in the figure below.
3. Apply the spacer (2) by wrapping it around the PCB Board (1) making sure to insert the plastic
connector mounted on the board into the hole provided in the spacer.
4. Plug the four-conductor wire harness (3) into the connector on the PCB Board (1).
5. Insert into the backshell (6) recess, PCB Board (1) with pad (2) in position.
6. Attach cover (7) to backshell (6) using screws (8).
Figure 3-5. Configuration Module Installation
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Preliminary Revision 1 190-00286-01
3.4 Unit Installation
The GWX 68 is designed to be rigidly mounted in the nose section of the aircraft. If the nose section is
not accessible, pod mounting is possible. The bulk head or antenna mounting plate must be very close to
perpendicular to the aircraft center line. The selected location must have adequate clearance for the full
antenna sweep and tilt range. See Appendix A for outline and installation drawings. The nose section
does not need to be pressurized.
It is crucial to the performance of the GWX 68 weather radar system that care be taken in
alignment of the GWX 68 unit with respect to the aircraft.
1. Refer to Figure A-1 mount the GWX 68 using the hardware provided.
2. Assemble the GWX 68 connector kit, see Section 3.3.
3. Check unit for clearance in all extreme positions.
4. Ensure wiring harness is routed in such a way that it can not be struck by or interfere with the unit
movement through the full sweep and tilt range.
3.5 Post Installation Configuration & Checkout
The GWX 68 does not provide valid outputs until the aircraft post installation
configuration procedures are completed.
When installed as part of the G1000 integrated cockpit system, the GWX 68 must have FAA approved
configuration data. Configuration data is loaded to the GWX 68 from an aircraft-specific G1000
Software Loader Card. Settings are predetermined for a specific aircraft and are typically contained
within the file named ‘TBD’.
The GDU 1040 PFD serves as the graphics user interface to the installer configuring the system. For
basic configuration information, refer to the G1000 Line Maintenance and Configuration Manual, Garmin
part number 190-00303-04. For actual aircraft installation/checkout, use only aircraft manufacturer
approved checkout procedures.
For GWX 68 installations operating with a Garmin MX20, refer to MX20 Installation Manual,
560-1025-09.
3.6 Continued Airworthiness
For sample Instructions for Continued Airworthiness (ICA) for the GWX 68 installed as part of the
G1000 integrated cockpit system, see the G1000 ICA Sample, Garmin part number 190-00303-07.
Other than for regulatory periodic functional checks, maintenance on the GWX 68 is “on condition” only.
Refer to the G1000 Line Maintenance and Configuration Manual, Garmin part number 190-00303-04.
NOTE
NOTE
GWX 68 Installation Manual Page 4-1
190-00286-01 Preliminary Revision 1
4 SYSTEM INTERCONNECTS
4.1 Pin Function List
4.1.1 P400
View of J400 connector from back of unit
123456789101112131415
161718192021222324252627282930
313233343536373839
404142
43
44
Pin Pin Name I/O
1 CONFIG MODULE GROUND --
2 RESERVED --
3 RESERVED --
4 ARINC 453 OUT A Out
5 ARINC 453 OUT B Out
6 RESERVED --
7 AIRCRAFT POWER 1 In
8 RESERVED --
9 AIRCRAFT POWER 1 In
10 AIRCRAFT POWER 2 In
11 RESERVED --
12 AIRCRAFT POWER 2 In
13 POWER GROUND --
14 RESERVED --
15 POWER GROUND --
16 CONFIG MODULE DATA I/O
17 CONFIG MODULE POWER Out
18 ROLL ATTITUDE HI In
19 ROLL ATTITUDE LO In
20 26 VAC GYRO REF LO In
21 26 VAC GYRO REF HI In
22 ARINC 429 IN 2 A In
23 ARINC 429 IN 2 B In
24 RESERVED --
25 RESERVED --
26 RESERVED --
27 RESERVED --
28 RESERVED --
29 RESERVED --
30 RESERVED --
31 CONFIG MODULE CLOCK Out
32 PITCH ATTITUDE HI In
33 PITCH ATTITUDE LO In
34 ETHERNET IN A In
35 ETHERNET IN B In
Page 4-2 GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
Connector P400, continued
Pin Pin Name I/O
36 ETHERNET OUT A Out
37 ETHERNET OUT B Out
38 ARINC 429 IN 1 A In
39 ARINC 429 IN 1 B In
40 RESERVED --
41 RESERVED --
42 RESERVED --
43 RESERVED --
44 RADAR REMOTE POWER OFF In
4.2 Power
4.2.1 Power Functions
This section covers the power input requirements.
4.2.1.1 Aircraft Power
Pin Name Connector Pin I/O
AIRCRAFT POWER 1 P400 7 In
AIRCRAFT POWER 1 P400 9 In
AIRCRAFT POWER 2 P400 10 In
AIRCRAFT POWER 2 P400 12 In
POWER GROUND P400 13 --
POWER GROUND P400 15 --
Pins 7 and 9 of P400 are internally connected to form AIRCRAFT POWER 1. Pins 10 and 12 of P400
are internally connected to form AIRCRAFT POWER 2. AIRCRAFT POWER 1 and AIRCRAFT
POWER 2 are “diode ORed” to provide power redundancy.
4.2.1.2 Remote On/Off
Pin Name Connector Pin I/O
RADAR REMOTE POWER OFF P400 44 In
For G1000 installations RADAR REMOTE POWER OFF must be grounded to pin 15 of P400 (POWER
GROUND).
GWX 68 Installation Manual Page 4-3
190-00286-01 Preliminary Revision 1
4.3 Serial Data
4.3.1 Serial Data Electrical Characteristics
4.3.1.1 ARINC 429/453
Pin Name Connector Pin I/O
ARINC 453 OUT A P400 4 Out
ARINC 453 OUT B P400 5 Out
ARINC 429 IN 1 A P400 38 In
ARINC 429 IN 1 B P400 39 In
ARINC 429 IN 2 A P400 22 In
ARINC 429 IN 2 B P400 23 In
4.3.1.2 Ethernet HSDB
Pin Name Connector Pin I/O
ETHERNET IN A P400 34 In
ETHERNET IN B P400 35 In
ETHERNET OUT A P400 36 Out
ETHERNET OUT B P400 37 Out
The Ethernet high speed data bus (HSDB) meets the hardware aspects of IEEE standard 802.3 for 10 base
T Ethernet communications.
4.4 Configuration
4.4.1 Configuration Module
Pin Name Connector Pin I/O
CONFIG MODULE GROUND P400 1 --
CONFIG MODULE DATA P400 16 I/O
CONFIG MODULE POWER P400 17 Out
CONFIG MODULE CLOCK P400 31 Out
4.5 Auto Pilot
4.5.1 Flight Instruments
Pin Name Connector Pin I/O
ROLL ATTITUDE HI P400 18 In
ROLL ATTITUDE LO P400 19 In
PITCH ATTITUDE HI P400 32 In
PITCH ATTITUDE LO P400 33 In
Inputs pitch and roll attitude information from AFCS. Expected nominal input voltage is 50mV/degree.
Page 4-4 GWX 68 Installation Manual
Preliminary Revision 1 190-00286-01
4.5.2 26 Volt AC Reference
Pin Name Connector Pin I/O
26 VAC GYRO REF LO P400 20 In
26 VAC GYRO REF HI P400 21 In
Expected nominal input voltage is 400 Hz, 26VRMS.
APPENDIX A OUTLINE & INSTALLATION DRAWINGS
GWX 68 Installation Manual Page A-1 (Page A-2 blank)
190-00286-01 Preliminary Revision 1
4.600±.022 116.84±0.56
AZIMUTH AXIS
6.815±.064 173.09±1.63
45°
MAX. AZIMUTH
ANGLE
BULKHEAD MOUNTING
SURFACE
6.624 168.25
3.312 84.12
6.750 171.45
3.375 85.73
10.00 254.0
4X .265 THRU6.73
.25 6.4
.30 7.6
4.951±.029 125.75±0.74
TILT AXIS
2.47 62.7
30°
MAX. TILT
ANGLE
R5.530 140.46
MAX SPHERICAL RADIUS
10" ANTENNA
R6.548 166.32
MAX SPHERICAL RADIUS
12" ANTENNA
NOTES:
1. DIMENSIONS: INCHES[mm]
2. 12" ANTENNA SHOWN
UP
PRELIMINARY
4X 211-64214-22
1/4-28 SOCKET HEAD CAP SCREWS
RIGHT ANGLE
CONNECTOR
Figure A-1. GWX 68 Outline Drawing
APPENDIX B INTERCONNECT DRAWINGS
GWX 68 Installation Manual Page B-1 (Page B-2 blank)
190-00286-01 Preliminary Revision 1
Figure B-1. GWX 68 Typical G1000 Interconnect Wiring Diagram
APPENDIX B INTERCONNECT DRAWINGS
GWX 68 Installation Manual Page B-3 (Page B-4 blank)
190-00286-01 Preliminary Revision 1
Figure B-2. GWX 68 Typical MX20 Interconnect Wiring Diagram
APPENDIX B INTERCONNECT DRAWINGS
GWX 68 Installation Manual Page B-5 (Page B-6 blank)
190-00286-01 Preliminary Revision 1
Figure B-3. GWX 68 Analog Stabilization Interconnect Wiring Diagram
APPENDIX B INTERCONNECT DRAWINGS
GWX 68 Installation Manual Page B-7 (Page B-8 blank)
190-00286-01 Preliminary Revision 1
Figure B-4. GWX 68 AHRS Stabilization Interconnect Wiring Diagram