Genesys GDR- NAV Series User manual

64-000109 Page 1 of 62
GDR-XXXX NAV/COM Installation Manual
REVISION HISTORY FOLLOWS ON PAGE 2.
WARNING: A printed copy of this document may not be the latest revision.
It is the responsibility
of the user to ensure that the latest revision is used. The latest revision of this document may be
printed from the Genesys Aerosystems electronic document repository.
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF GENESYS AEROSYSTEMS. NEITHER RECEIPT, NOR
POSSESSION THEREOF, CONFERS ANY RIGHT TO REPRODUCE OR USE, OR DISCLOSE, IN WHOLE OR IN PART, ANY SUCH
INFORMATION WITHOUT WRITTEN AUTHORIZATION FROM GENESYS AEROSYSTEMS.
APPROVAL NAME
PURPOSE:
This document is the Installation Manual for
the GDR-XXXX series Navigation and
Communication radio.
AUTHOR R DuRall
CHECK
D Boston
QUALITY
S Conn
COGNIZANT
B DeLong
COGNIZANT
COGNIZANT
RELEASE DATE: DOCUMENT NUMBER
64-000109
REV
A
Status
Draft
Typed signatures indicate approval. Handwritten,
or electronic signature approval of this document is
on file at Genesys Aerosystems, Anchorage,
Alaska.

GDR-XXXX NAV/COM INSTALLATION MANUAL
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REVISION RECORD
Rev
Notes
Date
Author
A
Original Version
See Cover
Page
R DuRall

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TABLE OF CONTENTS
CHAPTER 1 – INTRODUCTION.......................................................................................................7
1. PURPOSE................................................................................................................................7
2. SCOPE.....................................................................................................................................8
3. STYLE AND DEFINITION........................................................................................................8
4. UNPACKINGTHE GDR...........................................................................................................8
5. SPECIAL TOOLS.....................................................................................................................9
6. FUNCTIONAL DESCRIPTION..............................................................................................10
7. SYSTEM COMPONENTS .....................................................................................................14
8. ELECTRICAL SPECIFICATIONS..........................................................................................17
A. Power Inputs ...................................................................................................................................17
B. System Antenna Specifications .......................................................................................................17
C. Antenna Inputs ................................................................................................................................17
D. Microphone Inputs (DO-214, § 1.5.2)............................................................................................17
E. Audio Outputs and Levels...............................................................................................................17
9. ENVIRONMENTAL SPECIFICATIONS.................................................................................18
10. TSO APPLICABILITY.........................................................................................................20
11. TSO DEVIATIONS..............................................................................................................20
12. ACRONYMS AND ABBREVIATIONS................................................................................21
CHAPTER 2 – SYSTEM INSTALLATION......................................................................................23
1. LIMITATIONS AND NOTES...................................................................................................23
A. Notes and Warnings........................................................................................................................23
2. PRE-INSTALLATION INFORMATION..................................................................................23
3. CABLING TERMINATION .....................................................................................................24
A. General............................................................................................................................................24
B. Solder Sleeve Assembly...................................................................................................................24
C. Optional Shield Pull-Out Method...................................................................................................26
D. Back Shell Termination...................................................................................................................28
E. Right Angle BNC Connector Assembly ..........................................................................................28
4. MOUNTING............................................................................................................................29
A. Tray Installation..............................................................................................................................29
B. Tray Assembly.................................................................................................................................30
5. ANTENNA LOCATION...........................................................................................................31
A. COM Antenna..................................................................................................................................31
B. NAV Antenna...................................................................................................................................32
C. MB Antenna.....................................................................................................................................33
6. SIGNAL DESCRIPTION........................................................................................................34
A. Power and Ground..........................................................................................................................34
B. RS-232 Interface..............................................................................................................................34
C. ARINC 429 Interface.......................................................................................................................34
D. MIC Audio.......................................................................................................................................35
E. COM Audio and SIDETONE..........................................................................................................35
F. PTT and TX INTERLOCK..............................................................................................................36
G. NAV and MB AUDIO......................................................................................................................36
H. SDI, Power, and Discrete ...............................................................................................................37
CHAPTER 3 – SYSTEM DRAWINGS ............................................................................................39
1. MECHANICAL DRAWING.....................................................................................................39
A. GDR-XXXX .....................................................................................................................................39

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B. GDR TRAY ......................................................................................................................................40
2. GDR-XXXX CONNECTOR DRAWINGS...............................................................................41
A. P1 Connector...................................................................................................................................41
B. P2 Connector...................................................................................................................................42
3. WIRING DIAGRAMS..............................................................................................................43
CHAPTER 4 – GROUND FUNCTIONAL TESTS...........................................................................46
CHAPTER 5 – TROUBLESHOOTING............................................................................................49
1. TOOLS ...................................................................................................................................49
2. SETUP....................................................................................................................................49
3. FAULT INDICATIONS............................................................................................................49
4. FAILURES..............................................................................................................................49
5. COM PORT INSPECTOR......................................................................................................49
6. GDR-XXXX MAINTENANCE UTILITY ..................................................................................49
APPENDIX A – ARINC 429 SPECIFICATIONS.............................................................................50
1. ARINCLABELS 030 AND 047,VHF COM................................................................................51
2. ARINC LABEL 034,VOR/ILS FREQUENCY ..............................................................................52
3. ARINC LABEL 035, DME FREQUENCY.....................................................................................53
4. ARINC LABEL 040, UHF COM................................................................................................54
5. ARINC LABEL 173, LOC DEVIATION........................................................................................56
6. ARINC LABEL 174, G/S DEVIATION .........................................................................................57
7. ARINC LABEL 222, VOR BEARING AND MARKER BEACON TONES ...........................................58
8. ARINC LABEL 242 &244, VOR GROUND STATION ID.............................................................59
9. ARINC LABEL 263 &264, ILS GROUND STATION ID................................................................60
10. ARINC LABEL 350 LRU MAINTENANCE STATUS...................................................................61
11. ARINC 429 UPDATE RATE (ARINC 429-18, ATTACHMENT 2)...............................62

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LIST OF FIGURES
Figure 1: GDR-XXXX .......................................................................................................................10
Figure 2: GDR Block Diagram .........................................................................................................13
Figure 3: Solder Sleeve Assembly...................................................................................................24
Figure 4: Wire Termination...............................................................................................................25
Figure 5: Shield Pull-Out Method.....................................................................................................27
Figure 6: Shield Pull-Out Method (Continued).................................................................................27
Figure 7: Right Angle BNC Connector.............................................................................................28
Figure 8: Tray Assembly ..................................................................................................................30
LIST OF TABLES
Table 1: Installation Guide Style Conventions...................................................................................8
Table 2: Special Tools Required........................................................................................................9
Table 3: List of Specifications and Major Components ...................................................................14
Table 4: GDR-XXXX Configuration..................................................................................................14
Table 5: GDR Installation Kit P/N 42-033100-0001.........................................................................15
Table 6: List of Possible Antennas...................................................................................................16
Table 7: List of VHF COM Antennas ...............................................................................................31
Table 8: List of Extended VHF COM Antennas...............................................................................32
Table 9: List of VHF & UHF COM Antennas ...................................................................................32
Table 10: List of NAV Antennas.......................................................................................................32
Table 11: List of MB Antennas.........................................................................................................33
Table 12: VHF COM 118 MHz Frequency with 25 kHz or 8.33 kHz channel bandwidth ...............51
Table 13: Sign Status Matrix definition and SDI bit definition..........................................................51
Table 14: NAV Frequency Selection Format for 109.3 MHz, ARINC Label 034 ............................52
Table 15: Definition of Bits 11 to 13 for Label 034...........................................................................52
Table 16: Sign Status Matrix definition ............................................................................................52
Table 17: ARINC SDI bit definition...................................................................................................52
Table 18: DME Frequency Format for 109.3 MHz, ARINC Label 035............................................53
Table 19: ARINC Label 035, Bits 11-13...........................................................................................53
Table 20: Sign Status Matrix definition ............................................................................................53
Table 21: Navigation source bit definition........................................................................................53
Table 22: ARINC Label 035 SDI bit definition .................................................................................53
Table 23: UHF COM Data Format Label 040..................................................................................54
Table 24: Modulation Bits.................................................................................................................54
Table 25: Bit 13 ................................................................................................................................54
Table 26: SDI bit definition...............................................................................................................54
Table 27: Sign Status Matrix definition ............................................................................................54
Table 28: LOC Deviation Specification, ARINC Label 173 .............................................................56
Table 29: LOC Deviation Format, ARINC Label 173.......................................................................56
Table 30: Status Matrix definition.....................................................................................................56
Table 31: Sign Bit definition .............................................................................................................56
Table 32: Glideslope Deviation Specification, ARINC Label 174....................................................57
Table 33: Glideslope Deviation Format, ARINC Label 174.............................................................57
Table 34: Status Matrix definition.....................................................................................................57
Table 35: Sign Bit definition .............................................................................................................57
Table 36: VOR Bearing Specification, ARINC Label 222................................................................58
Table 37: VOR Bearing Format, ARINC Label 222.........................................................................58
Table 38: Status Matrix definition.....................................................................................................58

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Table 39: Sign Bit definition .............................................................................................................58
Table 40: Marker Beacon Tone Bit definition ..................................................................................58
Table 41: Morse code first word format, ARINC Label 263.............................................................59
Table 42: Morse code second word format, ARINC Label 264.......................................................59
Table 43: Status Matrix definition.....................................................................................................59
Table 44: Morse code first word format, ARINC Label 263.............................................................60
Table 45: Morse code second word format, ARINC Label 264.......................................................60
Table 46: Status Matrix definition.....................................................................................................60
Table 47: Sign Bit definition .............................................................................................................60
Table 48: Maintenance Status .........................................................................................................61
Table 49: Label 350 maintenance bit definition...............................................................................61
Table 50: Status Matrix definition.....................................................................................................62

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CHAPTER 1 – INTRODUCTION
1. PURPOSE
This manual provides a description of the Genesys Aerosystems (Genesys) Digital Radio
(GDR) series installation in an aircraft. The GDR can be used for new or retrofit
installations. The most recent version of this installation manual is always located online
at www.genesys-aerosystems.com under the “DealerLink” tab.
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 either
on or within a specific type or class of aircraft to determine that the aircraft installation
conditions are within the TSO standards. If not within the TSO standards, the article may
be installed only if further evaluation by the applicant documents an acceptable installation
and is approved by the Administrator.”
CAUTION: These instructions are intended for use by installers familiar with standard
aircraft avionics practices and methods of installation. If you do not have prior
experience with or knowledge of avionics installations, do not attempt the
following installation. Genesys will not be held liable for damaged items
resulting from improper handling and installation.

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2. SCOPE
This manual includes installation and checkout procedures for the GDR.
Chapter 1: Provides an introduction to the GDR.
Chapter 2: Includes system installation instructions.
Chapter 3: Includes unit drawings, both mechanical and electrical.
Chapter 4: Includes ground maintenance procedures.
Chapter 5: Includes ground functional test procedures.
Chapter 6: Includes troubleshooting procedures.
Appendix A: Includes ARINC 429 specifications.
3. STYLE AND DEFINITION
Stylistic elements used throughout this manual are listed in Table 1. These styles are
used to emphasize text, to make the information more accessible during installation and to
make the online manual more interactive.
Table 1: Installation Guide Style Conventions
Style
Description
Uses
Steps
Numbered steps that together form
a set of instructions for installing a
specific GDR.
The numbered steps provide guidance
through the proper sequence of
installation procedures.
Checklists
Installation procedures with
checkboxes beside them. All the
procedures in the checklist must be
performed, but do not need to be
performed in a specific order.
The checklist will help track the
installation progress. Place a check
mark on the PASS or FAIL line after
completion of each procedure.
NOTE:
Capitalized underlined text followed
by a colon.
The note format is used to highlight and
further explain certain installation and
operation details
CAUTION:
Bold, capitalized underlined text
followed by a colon.
This warning format is used to flag
important installation considerations.
Failure to heed the information in the
warnings could cause bodily harm or
death.
WARNING:
Bold, capitalized underlined text
followed by a colon.
This caution format is used to flag
important installation considerations.
Failure to heed the information in the
warnings could cause damage to the
aircraft or damage to the product.
4. SPECIAL CONSIDERATIONS
WARNING:
A. Changes or modifications to the equipment not expressly approved by the Genesys
Aerosystem could void the user's authority to operate the equipment.
B. It is the responsibility of the operator of this equipment to obtain any necessary
FCC licenses for transmitting with this equipment and transmit only on authorized
channels.

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5. UNPACKING THE GDR
A. System components are shipped in packaging designed to protect the components
during transit. Carefully unpack and identify each component using the list in
Table 3. Check the contents of the package against the packing list in the box.
Visually inspect each individual component for any signs of damage.
B. Keep all shipping containers and packaging in case they are needed for returning
items. Contact Genesys immediately if there are missing or damaged
components. Before returning any items, please contact Genesys by one of the
means below.
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
C. A claim must be filed for a damaged product within 48 hours of receiving the
equipment.
D. Most of the items required for installation are supplied in the original package
from Genesys. Supplemental items (not included in the package) are the
responsibility of the installer.
6. SPECIAL TOOLS
A. In addition to a standard aircraft mechanic’s tool set, crimp tools and locators that
meet MIL specification M22520 will be needed. These tools will ensure consistent,
reliable crimp contact connections.
Table 2: Special Tools Required
Tool Description
Part Number
Crimp Tool
M22520/1-01
Positioner
TH25
Crimp Tool
M22520/2-01
Positioner
M2520/2-08
Insertion Tool
CIET-20HD
B. In addition, the following tools and supplies should be available:
•A digital multi-meter for testing internal terminators on cable assemblies, and
for testing voltage
•Force gauge that can measure push and pull forces up to 90 pounds

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7. FUNCTIONAL DESCRIPTION
A. The GDR is a remotely mounted Very High Frequency (VHF) Navigation (NAV)
receiver, a VHF Communications (COM) receiver, an Ultra High Frequency (UHF)
Communications receiver and Marker receiver contained in a single rack-mounted
enclosure. A single transmitter is shared between the VHF and UHF COM radios.
The features included in the GDR are configured during manufacturing as defined
by the part number.The GDR is intended for air traffic control (ATC)
communications and VOR/ILS navigation.
Figure 1: GDR-XXXX
B. COM RX: Four (4) communications receivers are included in the GDR unit; two (2)
for VHF (Main and Guard) and two (2) for UHF (Main and Guard). Each band has
a separate audio output for audio panel interfacing. Guard and Main audio are
combined on the same output for each band. Audio volume control is available in
the radio for single pilot operation when an audio panel is not available.
C. COM TX: The GDR shares a single transmitter for VHF and UHF frequencies.
The VHF and UHF receivers have a separate microphone (MIC) inputs, Push-To-
Talk (PTT), and audio output for interface with the aircraft’s audio system. The
transmit frequency is determined by the PTT selected and the Main receiver
channel. Simultaneous VHF and UHF transmission is not allowed.
D. COM Classes:TX class, 3 and 5. RX class, C, D, and E.
E. Sidetone: A separate Sidetone audio output is available. Sidetone can be
configured to be on the receiver’ audio output or obtained from the independent
Sidetone audio output. When Sidetone is combined with the audio, only the
transmit band’s audio will have Sidetone present.

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F. COM TX Power: The transmitter is configured for either 16 Watts or 25 Watts as
determined by the part number. This is identified by the number “16” or “25”
respectively as the first two digits in the model number.
G. VHF frequency range:Depending on the model number, the VHF receiver
operates in the 118 MHz to 136.991 MHz, or the extended 118 MHz to 155.975
MHz range with either 8.33 KHz or 25 KHz spacing. This is identified with the
number “36” or “56” respectively as the third and fourth digits in the model number.
The 8.33 kHz spacing is used in the ICAO EUR region states.
H. UHF frequency range: Units with UHF transceivers operate from 225 MHz to
399.975 MHz with either 12.5 KHz or 25 KHz spacing. The letter “U” at the end of
the model number designates that the UHF option has been enabled. The UHF
transceiver can operate in simplex or semi-duplex mode.
I. COM guard receivers: Guard receivers are factory configured with the standard
emergency frequencies of the 121.5 MHz and/or 243 MHz.The receivers may be
disabled or configured for other channels as desired.
J. TX interlock: A TX interlock input is available when needed for multiple transmitter
installations.
K. NAV ILS/VOR receiver:The GDR has a combined VHF Omnidirectional Radio
(VOR) and Localizer (LOC) receiver.The VOR covers 160 channels and the LOC
covers 40 channels in the 108.00 to 117.95 MHz range.
L. NAV audio: The GDR provides a separate audio outputs for the VOR/LOC. Audio
volume control is available in the radio for single pilot operation when an audio
panel is not available.
M. Glideslope receiver: The GS channels are automatically paired by the radio to
provide Instrument Landing System (ILS) guidance on Localizer channels. The
GS covers 40 channels in the 330.95 MHz to 334.70 MHz range.
N. NAV antenna: The Glideslope and NAV receivers share a common antenna input
through an internal RF diplexer. The GDR is intended to be connected to a
combined VOR/LOC/GS antenna to be supplied by the installer. If two GDRs are
installed, an external NAV/GS splitter, similar to a Sensor Systems Model SSPD-
113-10 or equivalent, may be installed to route the VOR/LOC/GS signal to both
GDR receivers. This splitter is to be supplied by the installer. Alternately two NAV
antennas may be installed for redundancy. The GDR can tune an external
Distance Measuring Equipment (DME) transceiver using the ARINC 429
communications bus.
O. Marker beacon receiver: The GDR has a MB receiver, which uses a separate
BNC connector mounted on the front of the chassis. If two GDRs are installed, an
external MB splitter, supplied by the installer, may be used to route the MB signal
to both GDR receivers. A Cobham (Comant) Model CI 509 or equivalent splitter is

GDR-XXXX NAV/COM INSTALLATION MANUAL
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acceptable. The lamp indicators of the MB receiver are contained in the
transmitted ARINC 429 Label 222 (VOR) and the RS-232 message ID V33. No
discrete lamp drivers are provided.
P. Marker audio: The GDR has a separate MB audio output for connection to the
aircraft’s audio system. Audio volume control is available in the radio for single
pilot operation when an audio panel is not available.
Q. Marker thresholds: The MB receiver has a HI and LO threshold factory set for -67
dBm and -53 dBm respectively. When am external splitter is installed, the installer
may wish to compensate the MB thresholds for the loss. On installation, the
threshold may be adjusted using the RS-232 ID V52, which is stored in non-volatile
memory.
R. Control buses: The GDR radio has four (4) tuning buses, two RS-232, two RX
ARINC 429 and one TX ARINC 429.The last bus tuned controls the radio, which
is compatible with burst mode tuning.

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EFIS OR
CONTROLPANEL
GDR
RS-232 #1
SDI2
ARINC429
RS-232
ANALOG
EFIS OR
AUTOPILOT
ARINC TX
EFIS,HSI, OR
AUTOPILOT
PS ENABLE
ILS ENERGIZE
+UP
+DOWN
+GS FLAG
- GS FLAG
GS SUPERFLAG
VOR/LO C COMP
EFIS OR
CONTROLPANEL
RS-232 #2 EFIS OR EHSI
ARINC TX
ARINC RX #1
AUDIO SYSTEM
VHF MIC+
VHF MIC-
VHF AUDIO+
VHF AUDIO-
VHF P TT
UHF MIC+
UHF MIC-
UHF AUDIO+
UHF AUDIO-
UHF PTT
TX I NTERLOCK
NAV AUDIO+
NAV AUDIO-
MB AUDIO+
MB AUDIO-
ARINC RX #2
EMERGENCY
SIDE TONE+
SIDE TONE-
Figure 2: GDR System Block Diagram

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8. SYSTEM COMPONENTS
The table below provides a list of specifications and major components (by part number)
that make up the equipment system complying with the standards prescribed in all TSOs
listed in Chapter 1, Section 10.
Table 3: List of Specifications and Major Components
Component
Description
Part No.
Specifications
Dimensions
Weight
Power
GDR-XXXXX 42-03300X- XXXX
See Table 4
1.79”w
6.77”h
12.24”d 3.9 lbs.
8.0A TX
mode
0.8A RX
mode
Single GDR
Mounting
Tray
42-033 0.60 lbs. NA
Table 4 provides a part number breakdown for the currently defined radio configurations.
Table 4: GDR-XXXX Configuration
Part Number Model Number
VOR/ILS
Marker Beacon
136MHz VHF
156MHz VHF
225
-
400MHz
UHF
TX Power
42-033001-0001
GDR-1636
Y
Y
Y
16
42-033002-0001
GDR-1656
Y
Y
Y
16
42-033003-0001
GDR-1636U
Y
Y
Y
Y
16
42-033004-0001
GDR-1656U
Y
Y
Y
Y
16
42-033005-0001
GDR-2536
Y
Y
Y
25
42-033006-0001
GDR-2556
Y
Y
Y
25
42-033007-0001
GDR-2536U
Y
Y
Y
Y
25
42-033008-0001
GDR-2556U
Y
Y
Y
Y
25
42-033009-0001
GDR-1624U
Y
Y
16
42-033010-0001
GDR-2524U
Y
Y
25

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NOTE: Small parts and electrical components required for installation that are not specifically called
out in the parts list, shall meet the requirements for aerospace use as “acceptable parts” or
“standard parts. Selection of these parts shall be in accordance with guidance provided in FAA
Advisory Circular 20-62D, Dated 5/24/96 (or later revision).
Table 5: GDR Installation Kit P/N 42-033100-0001
ITEM
QTY
PART NUMBER
DESCRIPTION
1
1
3010-10153-01
Connector, D-Sub, 37 Pin, Female, Swage Locknut
2
1
3010-10152-01
Connector, D-Sub, 15 Pin, Female, Swage Locknut
3
2
3010-10154-01
Connector, Coax, Rack Mount
4
1
9010-21457-01
Radio Mounting Tray
5
4
9000-21465-01
Screw, Modified, Shoulder, Hex, 4-40 x .266”L, SS
6
4
MS24693-C4
Screw, Phillips, 100° Flat, 4-40 x 3/8”L, SS
7
1
031-4427
Connector, BNC, Straight Crimp Plug, RG-400/U, 50

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Table 6: List of Possible Antennas
Antenna function
Vendor
Part number
Maximum Airspeed
Freq. Range
Marker Antenna
Dayton Granger
EMB10-14
600 knots
75 MHz
Comant
CI 102
400 knots
75 MHz
Comant
CI 118
Not specified
75 MHz
VOR/LOC and GS Ant.
Vendor
Part number
Maximum Airspeed
Freq. Range
Dayton Granger
VT10-56-6/15960
108-118 & 329-335 MHz
Harris
DMN4-17N
Mach 1 "blade"
108-118 & 329-335 MHz
Comant
CI 205-3
300 knots "towel bar"
108-118 & 329-335 MHz
Comant
CI 120-400
300 knots "blade"
108-118 & 329-335 MHz
Comant
CI 120 G/S
600 knots "blade"
108-118 & 329-335 MHz
COM Antenna
Vendor
Part number
Maximum Airspeed
Freq. Range
VHF COM:
Harris
DM C60-1
Not specified "Blade"
118-137 MHz
Comant
C109
Not specified "whip"
118-137 MHz
Harris
DM C63-1/A
Not specified "whip"
118-137 MHz
Harris
DM C70-1/A
400 mph "Blade"
118-137 MHz
Extended VHF COM:
Harris
DM C60-17
Not specified "Blade"
118 -152 MHz
Comant
CI-108-1
Not specified "Blade"
118-153 MHz
Harris
DMC50
Mach 0.89 "Blade"
118-156 MHz
Harris
DM C50-17
Not specified "Blade"
116-156 MHz
Sensor Systems
S65-8280-18
Mach 0.85 "Blade"
116-156 MHz
VHF & UHF COM:
Sensor Systems
S65-8282-512
Mach 0.85 "Blade"
108-512 MHz
Cooper Antenna
21-50-99
Mach 0.95 "Blade"
100-400 MHz
NOTE: This is list is provided as a reference only. It is up to the installer to determine suitability of
each antenna for its intended purpose. The GDR radio should operate properly with any antenna
meeting the appropriate TSO.

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9. ELECTRICAL SPECIFICATIONS
Connector pin numbers for these inputs are listed in CHAPTER 3 – SYSTEM DRAWINGS.
A. Power Inputs
Receiver (NORM) 22 to 33 VDC, 1.0 Amps @ 22 VDC
27.5 VDC, 0.8 Amps typical
(EMER) 18.0 VDC, 1.2 Amps typical
Transmit (NORM) 22 to 33 VDC, 6.0 Amps @ 22 VDC
27.5 VDC, 5.7 Amps typical
(EMER) 18.0 VDC, 6 Amps typical
The Equipment shall provide the specified performance when operating on aircraft 28 VDC
power supplies with characteristics and limits as specified in MIL-STD-704F.
B. System Antenna Specifications
COM Ant: 50 Ohm, 3:1 VSWR max., recommended ≤ 2.5:1 max.
Marker Ant: 50 Ohm, 1.5:1 VSWR max.
G/S Ant: 50 Ohm, 5.0:1 VSWR max., recommended ≤ 3.0:1 VSWR
NAV Ant: 50 Ohm, 5.0:1 VSWR max., recommended ≤ 3.0:1 VSWR
C. Antenna Inputs
COM 50 Ohm BNC
Marker Ant 50 Ohm BNC
G/S RX 50 Ohm BNC
NAV RX 50 Ohm BNC
D. Microphone Inputs (DO-214, § 1.5.2)
Impedance: 150 Ohm
Bias: 12 VDC, on MIC HI input
Input voltage range: 0.25 to 2.5 VRMS for specified AM modulation
0.27 VRMS recommended typical audio panel input level
Input type: Differential, MIC HI to MIC LO
E. Audio Outputs and Levels
Audio Output Range: <2 to 8 Vrms configurable in ~0.03 Volt steps
Output load: 150 to 600 Ohms capable
Output balance: Floating differential or single-ended with negative side grounded
Audio power: Production set 100 mW into 150 Ohms, output voltage must be
reset for other impedances.
Marker audio output: 3.87 ± 0.50 VRMS, 100 mW, 150 Ohms
VOR/LOC audio output: 3.87 ± 0.50 VRMS, 100 mW, 150 Ohms
VHF COM audio output: 3.87 ± 0.50 VRMS, 100 mW, 150 Ohms
UHF COM audio output: 3.87 ± 0.50 VRMS, 100 mW, 150 Ohms
Sidetone audio output: 3.87 ± 0.50 VRMS, 100 mW, 150 Ohms
Combined Sidetone: Set -6 dB below received RX audio level, see note.

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Note: When Sidetone is combined with the normal receiver output, the Sidetone will be -6 dB
or 25 mW at 0.25 VRMS audio input.
10. ENVIRONMENTAL SPECIFICATIONS
The GDR-XXXX meets the following environmental testing requirements from DO-160F:
Sec.
Condition
Cat.
Test Category Description
Notes
4.0
Temperature and
Altitude
F2
Equipment intended for installation in a non-pressurized
but controlled temperature location on an aircraft that is
operated at altitudes up to 50,000 ft. MSL.
Operating High: +70˚C
Operating Low: -55˚C
Ground Survival High:
+85˚C
Ground Survival Low: -
55˚C
Altitude: 50,000 feet
4.5.5
In-Flight Loss of
Cooling
X
No cooling is required
4.62
4.63
Decompression
and
Overpressure
X
5.0
Temperature
Variation
A
Equipment external to the aircraft or internal to the
aircraft at 10°C/min.
6.0
Humidity
B
Equipment intended for installation in civil aircraft, non-
civil transport aircraft and other classes, within non-
environmentally controlled compartments of aircraft in
which more severe humidity environment may be
encountered.
7.0
Operational
Shocks
& Crash Safety
B
Equipment generally installed in fixed-wing aircraft or
helicopters and tested for standard operational shock
and crash safety.
8.0
Vibration
S
U2
U - (Helicopter w/Unknown Frequencies) Demonstrates
performance at higher vibration levels and after long
term vibration exposure for fuselage and instrument
panel equipment when the specific rotor frequencies
are unknown.
Fixed wing sine curve M &
B
Random vibration curves
F&F1
9.0
Explosive
Atmosphere
X
10.0
Waterproofness
W
Equipment is installed in locations where it may be
subjected to falling water, such as condensation.
11.0
Fluids
Susceptibility
X
12.0
Sand and Dust
S
Equipment installed in locations where the equipment is
subjected to blowing dust in the course of normal
aircraft operations.
13.0
Fungus
Resistance
F
Demonstrate whether equipment material is adversely
affected by fungi growth.
By Analysis
14.0
Salt Fog
S
15.0
Magnetic Effect
Z
Magnetic deflection distance less than 0.3m.
16.0
Power Input
Z
DC equipment intended for use on aircraft electrical
systems supplied by engine-driven alternator/rectifiers,
or DC generators where a battery of significant capacity
is floating on the DC bus at all times.

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Sec.
Condition
Cat.
Test Category Description
Notes
17.0
Voltage Spike
A
Equipment intended primarily for installation where a
high degree of protection against damage by voltage
spikes is required.
18.0
Audio Frequency
Conducted
Susceptibility-
Power Inputs
Z
Equipment intended primarily for installation where a
high degree of protection against damage by voltage
spikes is required.
19.0
Induced Signal
Susceptibility
ZC
Equipment intended primarily for operation in systems
where interference-free operation is required on aircraft
whose primary power is constant frequency (DC).
20.0
Radio Frequency
Susceptibility
(Conducted and
Radiated)
W/WR
Equipment and interconnecting wiring installed in
severe electromagnetic environments and to show
compliance with the interim HIRF rules. Includes JAA
INT/POL AC/AMJ 20.1317
Conducted: Cat. W & G
Radiated: Cat. W, R, & G
.
21.0
Emission of
Radio Frequency
Energy
M
Equipment in areas where apertures are EM significant
but not in direct view of aircraft antennas, such as
passenger cabin or cockpit.
22.0
Lightning
Induced
Transient
Susceptibility
A3J3L3
Equipment interconnected with shielded wiring installed
within any airframe or airframe
section where apertures,
not structural resistance are a significant source of
induced transients. Level 3 designates equipment and
interconnecting wiring installed in a moderately
exposed environment.
All wires (including
discretes) shielded and
heavily grounded.
23.0
Lightning Direct
Effects
X
Not Applicable
24.0
Icing
X
Not Applicable
25.0
Electrostatic
Discharge (ESD)
A
Electronic equipment that is installed repaired or
operated in an aerospace environment.
26.0
Fire,
Flammability
C
Non-metallic equipment, component parts, sub-
assemblies installed in pressurized or non-pressurized
zones and non-fire zones with largest dimension
greater than 50 mm.
By Analysis

GDR-XXXX NAV/COM INSTALLATION MANUAL
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11. TSO APPLICABILITY
The GDR-XXXX is an incomplete system for each of the TSOs listed below.
TSO
Title
MOPS
TSO-C34e
ILS Glideslope Equipment Operating within the Radio
Frequency Range of 328.6-335.4 MHz (Class D)
RTCA/DO-192
TSO-C35d
Airborne Radio Marker Receiving Equipment (Class A)
RTCA/DO-143
TSO-C36e
Airborne ILS Localizer Receiving Equipment Operating
within Radio Frequency Range of 108-112 MHz
RTCA/DO-195
TSO-C40c
VOR Receiving Equipment Operating within Radio
Frequency Range of 108-117.95 MHz
RTCA/DO-196
TSO-C128a
Devices That Prevent Blocked Channels Used in Two-
Way Radio Communication Due to Unintentional
Transmission.
RTCA/DO-207
TSO-C169a
VHF Radio Communication Transceiver Equipment
Operating within the Radio Frequency Range 117.975 to
137.000 MHz.
RTCA/DO-186B
12. TSO DEVIATIONS
The following TSO deviations have been granted for the GDR-XXXX.
TSO
TSO Deviation