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Apollo GX60 GPS
Installation Manual
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Garmin Apollo GX50 GPS, Apollo GX60 GPS, Apollo GX60 Comm, Apollo GX65 GPS, Apollo GX65 Comm Installation Manual

®
Apollo
Model GX50 GPS Model GX60 GPS/Comm Model GX65 GPS/Comm
Installation Manual
© 2003 Garmin Ltd. or its subsidiaries. All rights reserved. Printed in the U.S.A.
Garmin International, Inc., 1200 East 151st Street, Olathe Kansas 66062, U.S.A. Tel: 913/397.8200 Fax: 913/397.8282
Garmin (Europe) Ltd., Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, Hampshire S051 9DL, U.K. Tel: 44/1794.519944 Fax: 44/1794.519222
Garmin Corporation, No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan Tel: 886/02.2642.9199 Fax: 886/02.2642.9099
Garmin AT, Inc., 2345 Turner Road, S.E., Salem, OR 97302, U.S.A. Tel: 800/525.6726 Fax: 503/364.2138 Canada Tel: 800/654.3415 International Tel: 503/391.3411
Visit our web pages at http://www.garminat.com and http://www.garmin.com
Send comments about this manual by email to: techpubs.salem@garmin.com
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 written permission 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 for personal use, 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.
Information in this document is subject to change without notice. Garmin reserves the right to change or improve their products and to make changes in the content of this material without obligation to notify any person or organization of such changes or improvements.
Garmin®, Garmin AT®, Garmin AT, Apollo, and GNS are trademarks of Garmin Ltd. or its subsidiaries. These trademarks may not be used without the express permission of Garmin.
HISTORY OF REVISIONS
Revision SW Ver Date Description
-- Nov 5, 1997 Initial release.
-01 Nov 11, 1997 Corrected altitude input requirements.
-01b June 10, 1998 Added references about altitude encoders, F/AD, & serial interface
-02 June 26, 1998 Addition of Model GX65 GPS/Comm
-03 Mar 24, 1999 Test Mode additions, Serial data output, Apollo ACU added
-03a Sept. 23, 1999 Added new connector pins and crimping tools
-03b 5/8/00 Add new extended data and SL30 output messages
-03c 3.3 7/2/01 Add autopilot roll steering data, and changes for GX SW Ver 3.3. Mounting tube changes.
-04 2/18/02 Added helicopter environmental qualification information
-04a 3.5 4/2/02 Added Transceiver Status data output
-04b 9/18/03 Company name change
IMPORTANT NOTE
“The conditions and tests required for TSO approval of this article are minimum performance standards. It is the responsibility of those desiring to install this article on or within a specific type or class of aircraft to determine that the aircraft operating conditions are within TSO standards. The article may be installed only if further evaluation by the applicant documents an acceptable installation and is approved by the Administrator.”
Source: FAA TSO-C129a, TSO-C37d, TSO-C38d, and TSO-C128
ORDERING INFORMATION
To receive additional copies of this publication, order part # 560-0959-04b, Apollo GX50 GPS and GX60/GX65 GPS/Comm Installation Manual.
NOTES
Table of Contents
TABLE OF CONTENTS
ABOUT THIS MANUAL...................................................................................................................... 1
APOLLO GX50/60/65 DESCRIPTION ................................................................................................. 1
SYSTEM CONFIGURATIONS ............................................................................................................... 4
VFR GPS NAVIGATION INSTALLATION ..................................................................................................................... 4
IFR GPS NAVIGATION INSTALLATION....................................................................................................................... 5
COMM TRANSCEIVER - GX60/65 .............................................................................................................................. 5
DATABASE UPDATES........................................................................................................................ 5
ACKAGE CONTENTS........................................................................................................................ 6
P O
THER REQUIRED MATERIALS ......................................................................................................... 8
PRE-INSTALLATION INFORMATION ................................................................................................... 9
INSTALLATION OVERVIEW................................................................................................................ 9
MOUNTING CONSIDERATIONS ................................................................................................................................... 9
MINIMUM SYSTEM CONFIGURATION ......................................................................................................................... 9
ALTITUDE INPUT ....................................................................................................................................................... 9
HELICOPTER REQUIREMENTS .................................................................................................................................. 10
EQUIPMENT MOUNTING ................................................................................................................. 10
MOUNTING TUBE INSTALLATION............................................................................................................................. 11
UNIT INSERTION ...................................................................................................................................................... 12
UNIT REMOVAL....................................................................................................................................................... 12
ELECTRICAL CONNECTIONS............................................................................................................ 14
POWER .................................................................................................................................................................... 14
AVIONICS OUTPUTS................................................................................................................................................. 14
SERIAL INTERFACE.................................................................................................................................................. 14
SPEAKER AND HEADPHONE OUTPUTS (GX60/65 ONLY) ......................................................................................... 15
MICROPHONE INPUTS (GX60/65 ONLY) .................................................................................................................. 15
TRANSMIT KEY INPUT (GX60/65 ONLY)................................................................................................................. 15
INTERCOM SELECTOR SWITCH (GX60/65 ONLY) .................................................................................................... 15
REMOTE FLIP/FLOP INPUT (GX60/65 ONLY) ........................................................................................................... 15
COMM ANTENNA (GX60/65 ONLY) ........................................................................................................................ 15
GPS ANTENNA........................................................................................................................................................ 16
POST INSTALLATION CHECKOUT .................................................................................................... 25
TEST MODE CHECKOUT AND SETUP........................................................................................................................ 25
GPS NAVIGATION CHECKOUT................................................................................................................................. 27
VHF COMM CHECKOUT (GX60/65)........................................................................................................................ 28
FINAL SYSTEM CHECK............................................................................................................................................ 29
INTERFACE CHECKS ................................................................................................................................................ 29
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Table of Contents
ENVIRONMENTAL............................................................................................................................34
GPS RECEIVER PERFORMANCE.......................................................................................................34
AVIONICS OUTPUTS ........................................................................................................................35
ALTITUDE INPUT REQUIREMENTS ...................................................................................................36
COMM RECEIVER PERFORMANCE (GX60/65 ONLY)........................................................................37
COMM TRANSMITTER PERFORMANCE (GX60/65 ONLY) .................................................................37
INTERCOM PERFORMANCE (GX60/65 ONLY) ..................................................................................38
ANTENNA REQUIREMENTS ..............................................................................................................38
GPS ANTENNA ........................................................................................................................................................38
COMM ANTENNA .....................................................................................................................................................38
REAR CONNECTOR PINOUT .............................................................................................................39
INSTALLATION ................................................................................................................................41
LITHIUM BATTERY REPLACEMENT..................................................................................................45
REFERENCE OSCILLATOR (GX60/65) ......................................................................................................................45
CLEANING THE FRONT PANEL .........................................................................................................45
FROM GARMIN AT..........................................................................................................................49
COMMERCIALLY AVAILABLE ..........................................................................................................52
MOVING MAP OUTPUT ...................................................................................................................56
BINARY NEAREST LIST DATA (WHEN EXTENDED DATA IS ENABLED ONLY) ..................................59
ANNUNCIATOR OUTPUTS (WHEN EXTENDED DATA IS ENABLED ONLY) .........................................60
FLIGHT PLAN WAYPOINT TYPES (WHEN EXTENDED DATA IS ENABLED ONLY) ..............................61
NAVCOMM DATA OUTPUT .............................................................................................................62
REMOTE LOCALIZER LIST ........................................................................................................................................ 64
DISTANCE/SPEED/TIME MESSAGE ..................................................................................................66
ALTITUDE ENCODER/CONVERTER INPUT ........................................................................................67
FUEL/AIR DATA COMPUTER INPUT .................................................................................................68
“S” DATA FORMAT .................................................................................................................................................. 68
“Z” DATA FORMAT.................................................................................................................................................. 70
ii Apollo GX50/60/65 Installation Manual
Table of Contents
GPSS SERIAL OUTPUT ................................................................................................................... 72
TRANSCEIVER STATUS (WHEN MOVING MAP MODE IS ENABLED ONLY) ....................................... 73
LIST OF TABLES
TABLE 1 PACKAGE CONTENTS......................................................................................................... 7
TABLE 2 COMM INTERFACE CONNECTOR PINOUT ......................................................................... 39
TABLE 12 FUEL/AIR DATA MESSAGE DATA (S FORMAT).............................................................. 69
TABLE 13 FUEL/AIR DATA MESSAGE DATA (Z FORMAT).............................................................. 71
LIST OF ILLUSTRATIONS
FIGURE 1 GX50 FRONT PANEL........................................................................................................ 2
FIGURE 2 GX60/65 FRONT PANEL................................................................................................... 2
FIGURE 5 CABLE ROUTING ............................................................................................................ 13
FIGURE 6 REAR COAX CONNECTOR ASSEMBLY ............................................................................ 17
IGURE 11 APOLLO 50/60 CONNECTIONS WITH MD41 ANNUNCIATOR / RELAY............................ 21
F F
IGURE 12 RS-232 SERIAL CONNECTIONS .................................................................................... 22
FIGURE 15 UNIT DIMENSIONS........................................................................................................ 34
FIGURE 16 - EXAMPLE ANNUNCIATORS.......................................................................................... 36
FIGURE 17 MOVING MAP DATA OUTPUT (EXTENDED DATA DISABLED)....................................... 61
FIGURE 18 MOVING MAP DATA OUTPUT (EXTENDED DATA ENABLED)........................................ 62
FIGURE 20 FUEL / AIRDATA DATA INPUT (S FORMAT) .................................................................. 70
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Table of Contents
NOTES
iv Apollo GX50/60/65 Installation Manual
Introduction
SECTION 1 - INTRODUCTION
ABOUT THIS MANUAL
This manual describes the installation of the Apollo GX50 GPS and GX60/65 GPS/Comm units. It is intended for use by persons certified by the Federal Aviation Administration (FAA) to install aircraft navigation devices. It includes installation and checkout procedures for the GX50, GX60, GX65 and units to standards described in FAA advisory circulars AC 20-138 (for GPS) and AC 20-67B (for comm).
The GX50 and GX60/65 units are equivalent except that the GX50 does not include the VHF Comm. Throughout this manual, references to the GX50/60/65 are for the GX50, GX60, and GX65. The GX65 differs from the GX60 in that it is not certified for IFR approaches.
Section 1
Section 2
Section 3
Section 4
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Provides an introduction to the Apollo GX50/60/65 units. TSO certification information is also included in this section.
Includes installation and checkout procedures.
Includes complete specifications.
Includes limitations for the equipment and installation.
Includes troubleshooting information.
Includes periodic maintenance requirements.
Includes the environmental qualification form.
Includes information on accessories.
Includes serial data specifications.
APOLLO GX50/60/65 DESCRIPTION
The Apollo GX50 GPS is a TSO-C129a/JTSO-C129a Class A1 GPS supplemental navigation receiver for IFR en route, terminal, and non-precision approach operation. The unit features a moving map display and a database provided by means of a plug-in data card for convenience in changing and updating the database.
The Apollo GX60 GPS/Comm includes the same GPS capabilities as the GX50 and includes a 760 channel VHF Comm transceiver. The Apollo GX65 includes the same GPS and Comm capabilities as the GX60, except that it is not certified for non-precision approach. The GX65 has TSO-C129a/JTSO-C129a Class A2 authorization.
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Introduction
Figure 1 GX50 Front Panel
Figure 2 GX60/65 Front Panel
Introduction
FEATURES
The GPS navigation features for the GX50 GPS and GX60/65 GPS/Comm include:
• High resolution, daylight readable graphics display
• Automatic display intensity
• Back-lit buttons
• Simple “Direct-To” navigation
• Datacard database for easy user update and replacement
• Nearest waypoint and airspace search (includes airports, VORs, LocDMEs, NDBs,
intersections, and user waypoints)
• Remote waypoint search
• Navigation displays -
− Lat/Lon to 0.01 minute
− Bearing and distance to waypoint
− Ground speed and track angle
− Track angle error
− Desired track and distance between waypoints
− Cross track error with numeric and graphic CDI
− Display of the “TO” waypoint ident
− ETE and ETA to the “TO” and destination waypoints
− Altitude (from altitude encoder/converter input)
− Minimum safe altitude and en route safe altitude information
• Map Displays -
− Full screen map with bearing, distance to waypoint, and zoom level
− Split screen map with distance, speed, bearing, track, crosstrack error, To
waypoint, and zoom level
− Split screen with nav data and comm frequency display (GX60/65 only)
− Smart key, 1 button map declutter, Tri-state
− On map waypoint selection for information, direct-to nomination
− Track up, desired track up, and magnetic north up options
− Runway diagrams and runway names displayed
− 5nm ATC rings around airports with control towers
− Airspaces displayed by sector or outer boundary
− Airspace display controllable by type
− Approach preview page (GX50/60 only)
− Route line displayed
• Automatic waypoint sequencing
• Vectors to final input (GX50/60 only)
• DME arc assist
• Built-in simulator for trip planning and training
• User definable navigation pages with auto sequencing
• 30 flight plans of 20 legs each
• 500 user waypoints created by lat/lon or by radial/distance from a reference waypoint
• Real time clock (time and date) in UTC
• Countdown timer
Apollo GX50/60/65 Installation Manual
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Introduction
• Flight timer
• Automatic or manual magnetic variation
• Parallel track offset
• Alerts for -
− Loss of navigation data
− Arrival at waypoint
− Special use airspace
• Full range (10VDC to 40VDC) input supply voltage
The VHF Comm features of the GX60/65 GPS/Comm include:
• 760 channels
• Frequency range of 118.000 to 136.975 MHz
• Active and standby frequency display
• Transmit status indicator
• Stuck mic time-out
• Frequency monitor function - listen to Standby frequency while monitoring Active
frequency for any activity
• Weather channels - tune in to National Weather Service channels
• Built-in intercom function
• Frequency memory and recall functions
− from navigation data base
− 10 last used
− 10 user stored
• Two microphone inputs
• 12 watt audio amplifier
• Remote flip/flop input
SYSTEM CONFIGURATIONS
The GX50/60/65 can be installed in several configurations based upon individual requirements. This includes VFR or IFR GPS navigation. This section defines the minimum requirements.
VFR GPS NAVIGATION INSTALLATION
When installed for VFR operation, the GX50/60/65 requires only the following minimal connections.
• an A-33 or A-34 GPS antenna
• power input
The GX50/60/65 can also be connected to other external devices such as:
• an external non-numeric indicator, such as a CDI or HSI
• external lamp annunciators including “MSG” and “PTK”
• an “OBS/HLD” external annunciator (with switch)
• an autopilot
• a moving map display connected to an RS-232 serial output
Introduction
• an altitude encoder/converter
• Fuel/Airdata Computer (e.g. Shadin Model ADC-200)
When the GX50/60/65 is installed for VFR, a placard stating “GPS Limited to VFR Use Only” or an FAA approved equivalent statement must be placed next to the primary indicator.
IFR GPS NAVIGATION INSTALLATION
When installed for IFR operation, the GX50/60/65 requires connections to several external indicators. The minimum connections for IFR operation are as follows.
• an A-33 or A-34 GPS antenna
• power input
• an external non-numeric indicator, such as a CDI or HSI
• external lamp annunciators including “MSG” and “PTK”
For TSO-C129a A1 (non-precision approach) operation the following connections are also required (GX65 not included):
• external lamp annunciators including “APPRCH” and “ACTIVE”
• an “OBS/HLD” external annunciator (with switch)
• altitude input from an altitude encoder/converter or air data computer
The GX50/60/65 can also be connected to other external devices such as:
• an autopilot
• a moving map display connected to an RS-232 serial output
• an SL40 VHF Comm radio connected to an RS-232 serial output (For GX50 units)
• Fuel/Airdata Computer (e.g. Shadin Model ADC-200)
COMM TRANSCEIVER - GX60/65
For standalone installations, the comm requires connections to:
• a standard comm antenna
• a microphone (or microphones)
• a speaker or headphone
• power input
The microphone and speaker or headphones may be installed dedicated to the GX60/65 comm, or by connection to an audio panel.
The comm installation can also include optional connections:
• external remote flip-flop button
DATABASE UPDATES
The GX50/60/65 utilizes a Flybrary database stored on a standard plug-in memory card for easy updating and replacement. Simply plug in the new datacard to update your existing database or change to a new database.
Contact the Garmin AT factory for information on databases available for the GX50/60/65.
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Introduction
REGULATORY COMPLIANCE
The Apollo GX60/65 is designed and tested to meet the following TSO/JTSOs:
FAA TSO-C37d/JTSO-2C37e Class 4 for transmit FAA TSO-C38d/JTSO-C38e Class D for receive FAA TSO-C128/JTSO-2C128 for unintentional transmission (stuck mic) FAA TSO-C129a /JTSO C129a (GX60 – Class A1, GX65 – Class A2) for GPS navigation
The Apollo GX50 is designed and tested to meet the following TSO/JTSOs:
FAA TSO-C129a/JTSO-C129a Class A1 for GPS navigation
The Apollo GX60/65 comm complies with the FCC requirements specified in:
CFR 47, Part 87, Aviation Services, Subpart D, Technical Requirements
The Apollo GX50 and GX60/65 comply with the FCC requirements specified in:
CFR 47, Part 15, Radio Frequency Devices, Subpart B, Unintentional Radiators
The Apollo GX50/60/65 software is designed and tested to RTCA/DO-178B, level C and ED­12B Level C.
Note: Unauthorized changes or modifications to the GX50/60/65 may void the compliance to regulatory agency requirements and authorization for continued equipment usage.
UNPACKING THE EQUIPMENT
Carefully unpack the equipment. Visually inspect the package contents for any evidence of shipping damage. Retain all shipping containers and packaging material in case reshipment is necessary.
PACKAGE CONTENTS
As shipped from the Garmin AT factory, the Apollo GX50/60/65 package includes most items necessary for installation other than supplies normally available at the installation shop, such as wire and cable ties, and required input and output equipment. The standard items included in the package are listed in Table 1.
Introduction
Table 1 Package Contents
Part # Description Qty GX50 GX60 GX65 Units
430-6050-4xx GX50 GPS 1 430-6050-6xx GX60 GPS / Comm 1 430-6050-8xx GX65 GPS / Comm 1 Install kits Part number: 424-2007- -4xx -6xx -8xx
162-0100 15-pin dsub connector shell 1 1 162-0103 37-pin dsub connector shell 1 1 1 162-1008 Right angle coax plug 1 2 2 162-1060 TNC coax connector 1 1 1 202-0001 Cable tie 2 4 4 204-0037 Edge grommet 6” 6” 6” 204-2100 Shoulder bushing 2 4 4 221-0400 4-40 x 1/4 SS pan head Phillips machine screw
4 4 4
with lock washer 224-0404 4-40 x 1/4 SS flat head Phillips machine screw 6 8 8 245-0022 Crimp contact for dsub, 20 to 24 awg wire 37 52 52 310-5184-xx Mounting frame 1 1 1 310-5188-xx Connector mounting plate 1 1 1 998-0048 3/32 hex driver 1 1 1 Manual kits Part number: 564-0064- -4xx -6xx -8xx
560-0961-xx GX GPS User’s Manual 1 1 1 560-0959-xx GX50 / GX60 Installation Manual 1 1 1 560-0928-xx GX GPS Approach User’s Manual Insert 1 1 560-0963-xx GX60 Comm User’s Manual Insert 1 1 560-9000 Binder, 5½ x 8½ x 1” 3 ring 1 1 1 561-0236-xx GX60/65 Quick Reference Guide 1 1 561-0238-xx GX50 Quick Reference Guide 1 Accessories
560-0949-xx A-33 Installation Guide 1 1 1 590-1104 A-33 GPS Antenna 1 1 1
Note: Package contents may vary depending on how the unit is ordered.
Apollo GX50/60/65 Installation Manual
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Introduction
OTHER REQUIRED MATERIALS
The GX50/60/65 is intended for use with standard aviation accessories. External devices required for various installations are listed in the System Configurations section on page 4. Depending upon the installation, this will include items such as:
• annunciators
• a CDI or HSI
• a comm antenna
• a microphone(s)
• a speaker or headphones
SPECIAL TOOLS REQUIRED
Crimp Tool
A crimp tool meeting MIL specification M22520/1-01 and a positioner/locater are required to ensure consistent, reliable crimp contact connections for the rear d-sub connectors. These tools are available from:
For pin p/n 245-0022
Astro Tool Corp. Phone (503) 642-9853 21615 SW TV Highway Fax (503) 591-7766 Beaverton, OR 97006
Crimp tool: Astro Tool part #615708 Positioner: Astro Tool part #616356
For pin p/n 245-0027
ITT Cannon Phone (714) 261-5300 1851 E. Deere Ave. Fax (714) 575-8324 Santa Ana, CA 92705-6500
Insertion tool: ITT part # 274-7006-000 (Desc. CIET-20HD) Regular duty Crimp tool: ITT part #995-0001-585 (Desc. M22520/1-01) Regular duty Locator tool: ITT part #995-0001-244 (Desc. TH25) Heavy duty Crimp tool: ITT part #995-0001-584 (Desc. M22520/2-01) Heavy duty Locator tool: ITT part #995-0001-604 (Desc. M22520/2-08)
LICENSE REQUIREMENTS
An aircraft radio station license is required for operation of the GX60/65 comm transmitter once installed in the aircraft. An application must be submitted on FCC Form 404, which may be obtained from the FCC in Washington, DC, or any of its field offices. Procedures for applications are in CFR 47, Part 87, Aviation Services, Subpart B, Applications and Licenses.
Installation
SECTION 2 - INSTALLATION
This section describes the installation of the GX50 and GX60/65 including mounting, wiring, and connections. A post installation check-out procedure is included at the end of this section.
PRE-INSTALLATION INFORMATION
Always follow good avionics installation practices per FAA Advisory Circulars (AC) 43.13-1A,
43.13-2A, AC 20-138, and AC 20-67B, or later FAA approved revisions of these documents.
Follow the installation procedure in this section as it is presented for a successful installation. Read the entire section before beginning the procedure. Perform the post installation check­out before closing the work area in case problems occur.
INSTALLATION OVERVIEW
A successful installation should start with careful planning including determination of mounting location for the GX50/60/65, antenna mounting, cable routing, and other required modifications. Once the mounting location has been determined, prepare the mounting frame for installation. It may be easier to complete the wiring harness and attach the connectors to the mounting frame before installing the mounting frame.
INSTALLATION CONSIDERATIONS
MOUNTING CONSIDERATIONS
The GX50/60/65 is designed to mount in the avionics stack in the aircraft instrument panel within easy view and reach of the pilot. The standard package includes a mounting frame for ease of mounting, connections, and service of the unit. Allow an additional one inch clearance to the rear of the mounting frame for connectors and cables.
For typical installations, the GX50/60/65 does not require external cooling. When mounting the unit, ensure that a clearance of 1/8 to 1/4 inch exists between avionics units to allow for air circulation.
MINIMUM SYSTEM CONFIGURATION
The minimum system configuration and external connection requirements are described in the System Configurations section on page 4.
ALTITUDE INPUT
The GX50/60/65 includes an altitude input, which is used by the GPS RAIM calculations as well as providing for altitude assist functions such as altitude preset and hold and 3D airspace alerts. The altitude input is required for installations approved for non-precision approach operation, optional for other installations.
The GX50/60/65 altitude input can be connected from either an altitude encoder/converter or an air data converter. The minimum requirements for the altitude input are listed in the specifications on page 36.
Apollo GX50/60/65 Installation Manual
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Installation
HELICOPTER REQUIREMENTS
The GX60 and GX65 is qualified for helicopter installation with certain mount tube and GX60/65 configurations (see Section 4 - Limitations).
EQUIPMENT MOUNTING
Once the cable assemblies have been made, attach the 15 and 37 pin d-sub and coaxial cable connectors to the rear connector mounting plate and the mounting frame as illustrated in Figure 4 and Figure 5. Route the wiring bundle as appropriate. The rear connector plate should be attached to the mounting frame before installing the frame in the instrument panel. The rear connector plate can be used to tie down the cable assemblies. Use the supplied edge guard to protect the cable from sharp edges. Connect the shield grounds directly to the connector mounting plate.
Once the cable assemblies, the connector mounting plate, and the mounting frame are assembled, install the mounting frame assembly in the instrument panel as illustrated in Figure 3. Be sure to use low profile head screws so the unit will slide in and out freely. Attach the front of the mounting frame to the instrument panel. Use support brackets to attach the rear of the frame to the aircraft.
Installation
MOUNTING TUBE INSTALLATION
Care must be taken when installing the mounting tube to ensure you can properly insert and secure the unit. There must be a minimum vertical spacing of 0.040 inches between units to prevent interference with the cam locking mechanisms. Mounting tubes with clearance dimples help maintain the proper clearance. The mounting tube must be installed with the clearance dimples pointing up.
Figure 3 - Full Stack Mounting Tube Spacing
The mounting tube should be flush to the instrument panel and allow sufficient clearance for the back of the bezel of the unit to mount flush to the mounting tube. Sufficient clearance must exist in the instrument panel opening to allow ease of insertion and removal of the unit. If the back
of the unit bezel does not mount flush to the mounting tube, the connector may not engage fully.
Secure the mounting tube to the instrument panel structure. Mounting screw heads must not protrude into the mounting tube. Be sure to use the appropriate screws so the unit will slide in and out freely. The screws attaching the mounting tube to the instrument panel structure must not interfere with the insertion of the unit. Failure to prevent interference will result in damage to the unit or prevent its insertion. Take care that the mounting tube is not distorted when it is attached to the instrument panel and structural supports. Shims may be necessary to properly install the mounting tube. If the mounting tube is distorted out of square, the unit may either bind when being inserted or the cam lock may not engage.
Apollo GX50/60/65 Installation Manual
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Installation
UNIT INSERTION
Position the cam lock as shown below. The front lobe of the cam should be vertical. The cam lock mechanism should be fully unscrewed (turned counter-clockwise). Slide the unit into the frame. Turn (clockwise) and carefully hand-tighten (4 in-lb max.) the cam lock mechanism using only the 3/32" hex driver provided in the installation package. Using a larger tool than the one provided makes it easy to exceed the allowable torque on the cam lock resulting in damage to the unit. The unit will be pulled into the frame securing the unit and the connectors will fully engage. Do NOT overtighten. The back of the bezel must only be flush to the mounting tube. If the cam lock is hard to turn or the unit does not seat fully, the unit is probably binding and the mounting tube should be checked.
UNIT REMOVAL
To remove the unit from the mounting frame, turn the screw counter-clockwise with the hex driver to unscrew the cam lock mechanism. The unit will begin to pull away from the mounting tube. Turn the screw until slight resistance is felt and then pull the unit from the frame. Do not exert excessive turning force at the end of the cam lock travel or the unit may be damaged. With the cam lock fully disengaged, pull the unit straight out holding onto the sides of the bezel. It is not recommended that you pull the unit out by the rotary knobs. No special extraction tools are required, if the mounting tube is properly installed.
Installation
Figure 4 Mounting Frame Assembly
Figure 5 Cable Routing
Apollo GX50/60/65 Installation Manual
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Installation
ELECTRICAL CONNECTIONS
Wiring necessary for installation of the GX50/60/65 includes the rear panel electrical connections and the antenna cable placement. The 15 and 37 pin d-sub connectors and coax connector(s) may be wired before or after being installed in the mounting frame. The recommended connecting wire size for the connectors is 20 to 24 AWG. Wiring diagrams are included on pages 18 through 24.
POWER
The GX60/65 requires two power connections, one for the GPS navigation side of the unit, the other for the comm. Make the power connections to the unit using 20 AWG wire.
The GPS navigation power input is internally fused at 3 amps. A separate 2 amp (maximum) circuit breaker or fuse should be installed for downline overload or short circuit protection.
The comm power input (GX60/65 only) is internally fused at 7 amps. A separate 5 amp (maximum) circuit breaker or fuse should be installed for downline overload or short circuit protection.
Note: Circuits should be protected in accordance with guidelines in AC 43.13-1A, chapter 11, section 2, paragraph 429.
Warning
When connecting power to the GX unit, reversing the polarity of the connection will blow the internal fuse. The internal fuse is soldered onto the circuit board and requires repair at the factory.
AVIONICS OUTPUTS
The GX50/60/65 includes avionics outputs for CDI/HSI indicators, autopilot, and annunciators. These outputs are to be connected as appropriate for the particular installation. The CDI/HSI outputs may be connected to a dedicated CDI or HSI or to a shared indicator using an appropriate switching relay. The avionics outputs available are listed in the Avionics Outputs specification on page 35. Connect the annunciator outputs to lamp indicators as described in the specifications. The minimum connections required for different installations are listed in the System Configurations on page 4.
If a switching relay is used to make connections to a shared CDI/HSI, it should be a minimum of an eight pole relay box with an appropriate selector switch with annunciation. The ILS enable signal (see Figure 8 and Figure 11) from a connected ILS receiver can be connected to automatically switch the indicators back to the nav receiver when an ILS frequency is selected.
SERIAL INTERFACE
The GX50/60/65 includes two RS-232 serial ports for making optional connections. The serial ports can be used for connecting to such devices as the Apollo SL40 comm, a moving map display, multi-function display, autopilot, VHF Nav/Com, Fuel Air/Data computer, or an altitude encoder/converter. Serial output connections should be limited to no more than three external units.
When making connections to the GX50/60, use a three-conductor shielded cable (for two-way serial communication) or a two-conductor shielded cable (for one-way serial communication). Make RxD, TxD, and signal ground connections to the 37-pin connector. Connect the shield(s) to the rear of the mounting frame. The shield leads must be <1.25 inches. See Figure 5.
Complete serial interface specifications are included in Appendix E.
Installation
SPEAKER AND HEADPHONE OUTPUTS (GX60/65 ONLY)
Connect the speaker and headphones to the output pins on the rear connector.
MICROPHONE INPUTS (GX60/65 ONLY)
Microphone input connections should be made using a twisted pair shielded cable. Attach the signal ground to the mic ground pin on the rear connector and connect the shield to the rear connector plate.
TRANSMIT KEY INPUT (GX60/65 ONLY)
The TxKey input on the rear connector must be pulled low to ground to enable the transmitter. This input should be connected to a microphone or yoke mounted momentary push button switch.
INTERCOM SELECTOR SWITCH (GX60/65 ONLY)
The GX60/65 includes a voice activated intercom function that can be enabled by an external control switch. This is an optional connection.
When making connection for the intercom selection, connect the intercom selection input to a remote mounted normally open switch. A momentary toggle or alternate action switch can be used. Connect the other terminal of the switch to ground. The intercom function is enabled when the input is pulled low to ground. The monitor function is inhibited when the intercom function is selected.
REMOTE FLIP/FLOP INPUT (GX60/65 ONLY)
The GX60/65 includes a remote flip/flop input. This is an optional input that can be connected to a remote mounted (such as on the yoke) momentary push button switch which pulls the input low to ground.
ANTENNA INSTALLATION AND CONNECTIONS
COMM ANTENNA (GX60/65 ONLY)
The GX60/65 requires a standard 50Ω vertically polarized antenna. Follow the antenna manufacturer’s installation instructions for mounting the antenna.
The antenna should be mounted on a metal surface or a ground plane with a minimum area of 18 x 18 inches. The antenna should be mounted a minimum of two feet away from GPS antennas.
The comm antenna should also be mounted as far apart as practical from the ELT antenna, preferably one on top and the other on the bottom of the aircraft fuselage. Some ELTs have exhibited re-radiation problems generating harmonics that may interfere with GPS signals. This can happen when the comm (GX60/65 or any other comm) is transmitting on certain frequencies such as 121.15 or 121.175 MHz, which may cause the ELT output circuit to oscillate from the signal coming in on the ELT antenna coax. The antenna coax cable should be made of RG-142B or a comparable quality 50Ω coax. Assembly instructions for the rear coax connector are included in Figure 6.
Apollo GX50/60/65 Installation Manual
15
Installation
GPS ANTENNA
The mounting location and cable connections for the GPS antenna are very important. The antenna should be mounted no closer than two feet from VHF comm transmitter antennas, six inches from other antennas emitting less than 25 watts, and two feet from higher power antennas. Special care should be taken to ensure that the GPS antenna is not mounted in close proximity to antennas that may emit harmonic interference at the L1 frequency of
1575.42 MHz. Refer to the antenna installation manual for installation instructions.
The connectors are included in the installation kit, and are intended for use with RG-142B size coax cable. If using a different diameter coax, alternative connectors may be required. Assembly instructions for the connectors are included in Figure 6 and Figure 7. RG-142B cable can be used as long as the length is less than 20 feet. For longer lengths, use a low loss 50Ω coax.
Suggestion: Temporarily locate the GPS antenna with coax connected to the GX50/60/65 and check the GPS performance as described in the GPS Operation and Position test in the Post Installation Checkout on page 27. Once a suitable location has been verified, then permanently mount the antenna.
Note: If using a GPS antenna that was already on the aircraft, or if mounting the antenna closer than two feet from a comm antenna, conduct the GPS Operation and Position test in the Post Installation Checkout on page 27. If the GX50/60/65 passes the test, then moving the antenna is not necessary.
Once the antenna mounting position has been prepared, route the coax cable from the antenna to the GX50/60/65. Proper selection of coax cable and assembly of connectors is critical to GPS signal performance. The cable loss from the antenna to the GX50/60/65 should be limited to a maximum of 4 dB. Minimize the coax length for optimum performance and DO NOT coil excess cable. Leave only enough for service loops. The coaxial connectors and adapters, such as TNC to BNC, add additional loss to the cable and should be considered when computing the maximum 4 dB loss. A typical loss of 0.2 dB can be used for each connection. The typical cable loss for 20 feet of RG-142B coax with a connector on each end is 4 dB.
During the post-installation checkout, susceptibility to harmonics of VHF comm transmitters will be evaluated. If problems arise, then better isolation, or distance, may be required between the GPS and comm antennas, or a notch filter may be installed in series with the antenna coax of the VHF comm transceiver to reduce or eliminate the harmonic interference. A notch filter for this use (part #162-1059) is available from Garmin AT.
Note: GX60/65 performance has been verified in typical installations and has not shown
problems with the built-in comm interfering with the GPS when installed according to
If a VHF comm transmitter causes problems with the GPS on the selected frequencies as listed in the post-installation checkout, the problem may be due to the ELT. This can be verified by disconnecting the ELT antenna coax at the ELT unit. If the ELT is found to cause the problem, then contact the ELT manufacturer or replace the ELT.
the recommended installation guidelines.
Installation
Figure 6 Rear Coax Connector Assembly
Figure 7 TNC Coax Connector Assembly
Apollo GX50/60/65 Installation Manual
17
Installation
Figure 8 GX50/60/65 Power and Avionics Connections
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