Garmin gnc 300 Marine GPS System User Manual

GNC 300
INSTALLATION MANUAL
GARMIN INTERNATIONAL, INC.
1200 E. 151st STREET
OLATHE, KANSAS 66062-3426
PART NUMBER: 190-00067-02
REVISION J, 30 MARCH 1998
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 1
© Copyright 1995-1998
Garmin Corporation
All Rights Reserved
This publication is the proprietary property of Garmin International Inc. It may not
be reproduced or transmitted in any form whether printed or electronic, without the
expressed written consent of Garmin International.
Garmin International, Inc.
1200 E. 151st Street
Olathe, KS 66062
U.S.A.
REVISION RECORD
ECO #
Initial
5074
5219
5827
6042
6274
7708
8322
8452
Rev.
Rev.
Rev.
Rev.
Rev.
Rev.
Rev.
Rev.
Rev.
Rev.
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 2
Date of Rev. Description
A, 01 Oct 1995
B, 05 Jan 1996
C, 29 Jan 1996
D, 18 June 1996
E, 23 Aug 1996
F, 22 Oct 1996
G, 10 Dec 1997
H, 28 Jan 1998
J, 30 Mar 1998
FAA Approval
Initial release
Clarify Mid Continent annun units GA 56 Mod 1
Add MCI options
Add STC. Chg to barrel type crimp connectors.
Chg Fig. 1-3A to agree with MCI's.
Correct btry pinout chart
Add antenna, chg btry GPN
Chg to/from voltage
Corr to btry pk s/n & misc. chgs.
TABLE OF CONTENTS
SECTION 1
GENERAL DESCRIPTION
1.1
1.2
1.2.1
1.2.2
1.2.3
1.3
INTRODUCTION
TECHNICAL CHARACTERISTICS
PHYSICAL CHARACTERISTICS
OPERATIONAL CHARACTERISTICS
INTERFACES
LICENCE REQUIREMENTS
SECTION 2
INSTALLATION CONSIDERATIONS
2.1
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.2
2.2.1
2.3
2.4
2.5
2.6
ANTENNA CONSIDERATIONS
GPS ANTENNA LOCATION
COMM ANTENNA LOCATION
ELECTRICAL BONDING
ANTENNA LIMITATIONS
VHF COMM INTERFERENCE OF GPS
COMM ANTENNA INSTALLATION CONSIDERATIONS
RACK CONSIDERATIONS
ACCESSIBILITY
CABLING AND WIRING
COOLING AIR
MINIMUM INSTALLATION REQUIREMENTS
EXTERNAL ALTITUDE INPUT
SECTION 3
INSTALLATION PROCEDURE
3.1
3.2
3.3
3.4
3.5
3.6
INSTALLATION ACCESSORIES
ANTENNA INSTALLATION
CABLE INSTALLATION
RACK INSTALLATION
GNC 300 INSTALLATION AND REMOVAL
COMM ANTENNA INSTALLATION CHECK
SECTION 4
POST INSTALLATION CONFIGURATION &
CHECKOUT PROCEDURE
SECTION 5
CERTIFICATION
SECTION 6
CONTINUED AIRWORTHINESS
APPENDIX A
APPENDIX B
APPENDIX C
CERTIFICATION DOCUMENTS
CONNECTOR CHANGES
STC PERMISSION
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LIST OF ILLUSTRATIONS
FIGURE
1-1
1-2
1-3
1-4
2-1
2-2
2-3
3-1
3-2
3-3
3-4
3-5
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PINOUT DEFINITION, 37 PIN DSUB
PINOUT DEFINITION, 26 PIN HD-DSUB
INTERCONNECT SCHEMATIC
INTERCONNECT SCHEMATIC NOTES
GPS ANTENNA INSTALLATION CONSIDERATIONS
GNC 300 INSTALLATION CONSIDERATIONS
SWITCH/ANNUNCIATOR LAYOUT
STUD MOUNT GA 56 INSTALLATION
FLANGE MOUNT GA 56 INSTALLATION
COAX CABLE INSTALLATION
AVIATION RACK DIMENSIONS
AVIATION RACK INSTALLATION
SECTION 1 GENERAL DESCRIPTION
1.1 INTRODUCTION
This manual describes the physical, mechanical, and electrical characteristics and
the installation requirements for the GNC 300 Aviation Kit.
After installation of the GNC 300 system, FAA Form 337 must be completed by an
appropriately certificated agency to return the aircraft to service.
1.2
TECHNICAL CHARACTERISTICS
The GNC 300 offers the versatility of fixed installation in a panel mounted aviation rack
as well as complete portability.
For TSO Compliance, see Appendix A.
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. The article may be installed only
if further evaluation by the applicant documents an acceptable installation and is
approved by the Administrator.
1.2.1 PHYSICAL CHARACTERISTICS
Width:
Height:
Depth:
GNC 300 Weight:
GA 56 Antenna Weight:
Aviation Rack Weight:
Max Air Speed:
(Structural rating for antenna)
6.25 inches
2 inches
5.65 inches
2.4 lbs.
4 oz.
10 oz.
Subsonic
1.2.2 OPERATIONAL CHARACTERISTICS
Operating Temperature Range:
Humidity:
Altitude Range:
Power Range
Power Requirements:
-20 oC to +55 oC
95% non-condensing
-1,500 to 50,000 ft.
10 to 15.1 VDC
1.2A @ 13.8v (not transmitting)
5.5A @ 13.8V (transmitting)
1.2.3 INTERFACES
The GNC 300 provides interfaces to various general aviation instruments. Figure 11 defines the function of each pin on the 37 pin DSUB connector located at the back
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of the rack. Figure 1-2 defines the function of each pin in the 26 pin HD-DSUB
connector (J102) located above the 37 pin connector at the back of the rack. Figures
1-3 and 1-4 defines the interconnects between the rack and other instruments. The
following interfaces are provided.
1.2.3.1 37 PIN CONNECTOR (J101)
CDI:
(Pins 1 and 4)
Capable of driving up to three 1000 ohm parallel
loads, +150 millivolts full scale deflection with a
maximum output of +300 millivolts.
To/From:
(Pins 2 and 4)
Capable of driving up to three 200 ohm parallel
loads, +82 millivolts full scale deflection.
Units with Mod Status 1: +190 millivolts full scale deflection.
Nav Flag:
(Pins 3 and 4)
Capable of driving up to three 1000 ohm parallel
loads, 375 millivolts for flag out-of-view, and
+40 millivolts for flag in-view.
OBI data:
(Pins 7, 8, and 23)
Output providing bearing to waypoint data for a
Bendix/King RMI (KI 229 or equivalent).
Message annunciator:
(Pin 20)
Output capable of driving negative logic message
annunciators by sinking up to 500mA.
RS232 chan 1 output data: Output capable of driving devices as listed in Section 4.
(Pin 24)
Conforms to the EIA specification RS-232C.
RS232 chan 2 output data: Output capable of driving devices as listed in Section 4.
(Pin 19)
Conforms to the EIA specification RS-232C.
RS232 chan 1 input data: Input capable of receiving data from devices listed in
(Pin 17)
Section 4. Conforms to the EIA specification RS-232C.
Arrival annunciator:
(Pin 12)
Output capable of driving negative logic annunciator
by sinking up to 500mA.
GPS approach active ann: Output capable of driving negative logic annunciator
(Pin 13)
by sinking up to 500mA. See GNC 300 Pilot's Guide,
(GPN 190-00067-00), for more information.
GPS approach arm ann:
(Pin 28)
Output capable of driving negative logic annunciator
by sinking up to 500mA. See GNC 300 Pilot's Guide,
(GPN 190-00067-00), for more information.
ARINC 429 Output A & B: Output capable of interfacing with any device that has
(Pins 15 and 16)
an input conforming to the GAMA ARINC 429 (low
speed) specification.
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NAV Super Flag Output:
(Pin 10)
Output capable of driving positive logic NAV Super
Flag by sourcing up to 500mA for flag out of view (NAV
valid).
RS422 input:
(Pins 11 & 27)
Input capable of receiving serial OBS data from
Collins Pro Line 2 EFIS DSP unit.
GPS approach arm low:
(Pin 9)
Input, when grounded, controls approach mode.
GPS OBS:
(Pins 4,14,35 and 37)
Capable of interfacing with a standard OBS resolver.
ARINC 429 Input A & B:
(Pins 32 & 33)
Input capable of receiving data from ARINC 429 (low
speed) devices as listed in Section 4.
Battery +,-, Charge Enable Connection for GARMIN remote battery accessory.
(Pins 30, 34, 29)
1.2.3.2 26 PIN CONNECTOR (J102)
MIC Audio Hi and Lo::
(Pins 2 and 3)
Input requiring 275mV RMS into 470 ohm load.
(Standard carbon or dynamic MIC containing
transistorized pre-amp.)
MIC Key:
(Pin4)
Input, when grounded, keys the transmitter.
COMM Audio Hi and Lo:
(Pins 5 and 6)
Output capable of driving a 500 ohm load with
100mW.
MIC Intercomm:
(Pin 8)
Input requiring 125mV RMS into 470 ohm load.
(Standard carbon or dynamic MIC containing
transistorized pre-amp.)
Remote Transfer:
(Pin 10)
Input, when grounded, swaps the active and
standby COMM frequencies.
TX Interlock:
(Pin 12)
Input, when grounded, reduces receiver sensitivity
so squelch will not break when another transceiver is
keyed.
Altimeter input:
(Pins 14-24)
Capable of receiving encoded output data from any
parallel altimeter device.
Remote Enter:
(Pin 26)
Input, when ground, functions the same as the enter
key on the GNC 300 front panel.
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Sequence Hold Low:
(Pin 13)
Input, when grounded, activates HOLD mode. See
the GNC 300 Pilot's Guide (GPN 190-00067-00) for
more information.
1.2.3.3 COMM Antenna Connector (J4)
Capable of providing 5 watts, minimum, at 13.8V. Sensitivity of 6 dB SNR, minimum,
at 2 uV hard. The COMM antenna shall be approved to TSO C37( ) and C38( ).
1.3
LICENCE REQUIREMENTS
The transmitter, as installed in the aircraft, requires an Aircraft Radio Station
Licence. This licence is obtained by filing the FCC Form 404. While awaiting the
receipt of the station licence, a copy of FCC Form 404 is kept in the aircraft.
This equipment has been type accepted by the FCC and entered on the type accepted equipment list, as GARMIN GNC 300 and must be identified as GARMIN
GNC 300 on your Form 404, Aircraft Radio Station Licence application.
CAUTION
THE VHF TRANSMITTER IN THIS EQUIPMENT IS GUARANTEED TO MEET
FEDERAL COMMUNICATIONS COMMISSION ACCEPTANCE OVER THE OPERATING TEMPERATURE RANGE. MODIFICATIONS NOT EXPRESSLY APPROVED
BY GARMIN COULD VOID THE LICENCES' AUTHORITY TO OPERATE THE
EQUIPMENT.
SECTION 2 INSTALLATION CONSIDERATIONS
Careful planning and consideration of the suggestions in this section are required to
achieve the desired performance and reliability from the GNC 300.
2.1 ANTENNA CONSIDERATIONS
2.1.1 GPS ANTENNA LOCATION
The GNC 300 GA 56 Antenna must be mounted on top of the aircraft. For best
performance select a location with an unobstructed view of the sky above the aircraft
when in level flight. Figure 2-1 illustrates a typical GPS antenna installation.
For rotorcraft, locate the GA 56 antenna:
1) As far from the main rotor hub as possible. This reduces the percentage of time
the blade blocks the antenna.
2) As far below the blade surface as possible if installing the antenna under the blade.
This reduces signal distortion caused by the blades.
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The antenna should be located at least 3 feet from transmitting antennas such as VHF
Comm, HF transmitter, DME, Transponder, and Radar.
2.1.2 COMM ANTENNA LOCATION
The COMM antenna should be well removed from all projections, engines and
propellers. The ground plane surface directly below the antenna should be a flat plane
over as large an area as possible (18 inches square minimum).
The antenna should be mounted a minimum of 6 feet away from any DME antennas,
4 feet from any ADF sense antennas, and a minimum of 3 feet from the GNC 300 and
its GPS antenna.
The GNC 300 COMM antenna connector is specified to have installed GPN 330-0006700 (1.57542 GHz notch filter) to minimize interfering harmonics.
2.1.3 ELECTRICAL BONDING
No special precautions need to be taken to provide a bonding path between the GPS
antenna and the aircraft structure.
Follow the manufacturers instructions for the COMM antenna.
2.1.4 ANTENNA LIMITATIONS
GARMIN'S GA 56 Antennas are recommended for installations where the airspeed of
the aircraft will be subsonic.
GARMIN's GA 56, Mod 1 or later, must be used.
See the COMM antenna specification for its limitations.
2.1.5 VHF COMM INTERFERENCE OF GPS
On many panel-mounted aircraft, VHF COMM's can radiate strong harmonics from
the unit and antenna. The GNC 300 COMM section will not interfere with its GPS
section. However, placement of the GNC 300 GPS antenna relative to all COMM's and
COMM antenna, including its own, is critical.
Use the following guidelines, in addition to others in this document, when locating the
GNC 300 and its antennas.
GPS Antenna:
GNC 300:
Locate as far as possible from all COMM antennas
and all COMMs (including the GNC 300). The GPS
antenna will be much less sensitive to COMM antennas that
use a 1.57542 GHz notch filter.
Locate as far as possible from all COMM antennas.
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If a COMM antenna is found to be the problem, a 1.57542 GHz notch filter (GPN 33000067-00) may be installed in the VHF COMM coax, as close to the COMM as possible.
This filter (GPN 330-00067-00) is required for the GNC 300 transmitter).
If a COMM is found to be radiating, the following can be done:
1)
2)
3)
Replace or clean VHF COMM rack connector to assure good coax ground.
Place a grounding brace between the GNC 300, VHF COMM, and ground.
Shield the VHF COMM wiring harness.
2.1.6 COMM ANTENNA INSTALLATION INSTRUCTIONS
The COMM antenna should be installed according to the manufacturer's
recommendations.
2.2 RACK CONSIDERATIONS
2.2.1 ACCESSIBILITY
Plan a location which gives the pilot complete and comfortable access to the entire
keypad and which is plainly visible from the pilot’s perspective. Check that there is
adequate depth for the rack in the instrument panel. A location away from heating
vents or other sources of heat generation is optimal. Figure 2-2 illustrates a typical
aviation rack installation.
2.3
CABLING AND WIRING
The recommended antenna cable type for both antennas is M17/155-0001 (RG-58A/
U) per MIL-C-17. Maximum allowable length for the GPS antenna using this cable
type is 40 feet. Other cable types with 50 ohms nominal impedance and longer lengths
can be used for the GPS antenna, provided the installer insures that the attenuation
does not exceed 10dB at 1.5 GHz for the specific installation. Check that there is
ample space for the cabling and mating connectors. Avoid sharp bends in cabling,
particularly the COMM antenna cable, and routing near aircraft control cables.
Cabling for the GNC 300 should not be routed near components or cabling which are
sources of electrical noise.
Do not route the COMM antenna cable near any ADF antenna cables.
Route the GPS antenna cable as far as possible away from all COMMs and COMM
antenna cable.
2.4
COOLING AIR
Cooling air is not required for the GNC 300 but is highly recommended because, as
with any electronic equipment, reduced operating temperature can contribute to
increased reliability. Additionally, location of the GNC 300 in a stack of other power
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dissipating equipment can produce unacceptably high ambient air temperatures
around the unit. A 5/8 inch diameter air fitting is provided on the rear of the mounting
rack for the purpose of admitting cooling air under such conditions.
2.5
MINIMUM INSTALLATION REQUIREMENTS
Below is a list of required devices for A1 and A2 certification. Figure 1-3 shows
various equipment that can be used. For a specific list of equipment used in the
initial STC see GPN 190-00067-06. Deviations from this equipment should be
approved by the FAA or the governing organization.
Pressure Altitude Device
This device delivers pressure altitude data to the GNC 300. This data
can come from an encoder or serializer.
Manual Course Device
This device delivers the manual course selected to the GNC 300.
Course information can come from an analog resolver or from an EFIS
via the ARINC 429 bus or RS-422 bus.
HSI/CDI Device
This device displays Nav Flag, Left/Right and To/From. This can be
displayed on the EFIS or HSI.
External Annunciators
NAV
GPS
NAV/GPS
HOLD
AUTO
GPS Sequence
Approach Actv
Approach Arm
GPS Approach
Message
Arrival
and Switches
Annunciator
Annunciator
Switch
Annunciator
Annunciator
Switch
Annunciator (not required for A2)
Annunciator (not required for A2)
Switch (not required for A2)
Annunciator
Annunciator
The installer is advised to ensure that the switches and annunciators
are the functional equivalent to and perform at least as well as the
GARMIN devices used in the initial STC. The GARMIN switches and
annunciators are sunlight readable and in the primary view of the
pilot. Figure 2-3 shows what the GARMIN switch/annunciators look
like. For other information concerning switch/annunciators see the
Generic Airplane Flight Manual Supplement (190-00067-04) as well
as current FAA directives.
Qualified GPS Antenna
This antenna must be one of those listed in the accessories list.
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2.6
EXTERNAL ALTITUDE INPUT
Pressure altitude input from an external source may be derived from a RS-232
compatible serial altitude input or Parallel Gray Code/Gillham Altitude as described
in Section 4 of this manual. Gillham Altitude is not required when serial altitude is
used.
SECTION 3 INSTALLATION PROCEDURE
3.1
INSTALLATION ACCESSORIES
The following installation accessories are available:
ANTENNA AND RACK OPTIONS
010-10040-01
GA 56 ANTENNA KIT, W/O CABLE (Mod 1, or later)
Includes:
011-00134-00
GA56 ANTENNA SUB-ASSEMBLY
1
115-00031-00
BACKING PLATE
1
210-10004-09
NUT, SELF-LOCKING, #8-32
4
253-00002-00
ANTENNA GASKET
1
010-10040-02
GA 56 FLANGE MOUNT ANTENNA (Mod 1, or later)
Includes:
011-00147-00
FLANGE MOUNT GA56 ANTENNA SUB-ASSEMBLY
1
115-00080-00
NUT PLATE
1
211-62212-14
SCREW, #10-32 X 5/8
4
253-00011-00
ANTENNA GASKET
1
320-00003-00 15 FT LOW-LOSS AVIATION ANT. EXTENSION CABLE WITH RIGHT ANGLE BNC CONNECTOR
320-00003-02 30 FT LOW-LOSS AVIATION ANT. EXTENSION CABLE WITH RIGHT ANGLE BNC CONNECTOR
330-00087-00 CONNECTOR, BNC, MALE, CLAMP
Note: One cable assembly and one BNC connector are required to make the antenna cable, or it can
be fabricated by the installer from materials meeting the requirements of paragraph 2.3.
011-00154-00
MOUNTING RACK, (WITHOUT CONNECTORS)
Note: A mounting rack is required for approved installations. The following hardware is required for installation of the mounting rack, but is not provided:
#6-32 Flat Head Screw (4 ea.)
#6-32 Self-locking Nut (4 ea.)
011-00313-00
CONNECTOR, (J1 and J2) Kit
DATA BASE OPTIONS
010-10051-00
MEMORY
010-10051-01
MEMORY
010-10051-02
MEMORY
010-10032-03
MEMORY
CARD
CARD
CARD
CARD
- WORLDWIDE DATABASE
- AMERICAS DATABASE
- INTERNATIONAL DATABASE
- USER
ANNUNCIATOR OPTIONS
GPN
MID-CONTINENT P/N
013-00029-10
MD41-448
013-00029-11
MD41-444
013-00029-12
MD41-448 (5V)
013-00029-15
MD41-458
013-00029-16
MD41-454
013-00029-17
MD41-458 (5V)
DESCRIPTION
INTEGRATED SW/ANN
INTEGRATED SW/ANN
INTEGRATED SW/ANN
INTEGRATED SW/ANN
INTEGRATED SW/ANN
INTEGRATED SW/ANN
UNIT,
UNIT,
UNIT,
UNIT,
UNIT,
UNIT,
MISCELLANEOUS OPTIONS
010-10075-00
PC KIT
190-00067-00
GNC 300 PILOT'S GUIDE
190-00067-01
GNC 300 QUICK REFERENCE GUIDE
190-00067-06
GNC 300 IN MOONEY M20J DOCUMENTED INSTALLATION
330-00067-00
GPS 1.57542 GHZ NOTCH FILTER
362-00014-00
WALL ADAPTER - 110/220VAC
010-10057-00
28 TO 14V CONVERTER (Consists of 011-00181-00)
010-10074-00
REMOTE BATTERY PACK (Consists of 011-00182-00)
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HOR, 28V
HOR, 14V
HOR, 28V (5V LIGHTING)
VERT, 28V
VERT, 14V
VERT, 28V (5V LIGHTING)
The following installation accessories are required but not provided:
COMM ANTENNA:
HEADPHONES:
MICROPHONE:
3.2
BROAD BAND 50 OHM VERTICALLY POLARIZED WITH COAXIAL CABLE.
500 OHM NOMINAL IMPEDANCE
LOW IMPEDANCE CARBON OR DYNAMIC WITH TRANSISTORIZED PRE-AMP.
ANTENNA INSTALLATION
For the COMM antenna, follow the manufacturers instructions.
The remainder of this section applies to the GPS antenna. The GA 56 Antenna outline
and footprint dimensions are shown in Figures 3-1 and 3-2.
A. Using the backing plate as a template, mark the location of the mounting holes
and the through hole for coax cable. Drill or punch the holes.
B. The antenna installation must provide adequate support for the antenna considering
a maximum drag load of 5 lbs. for the GA 56 antennas (at subsonic speed). Install
a doubler plate to reinforce thin skinned aircraft. Observe guidelines for
acceptable installation practices as outlined in AC 43.13-2A.
C. Seal the antenna and gasket to the fuselage using a good quality electrical grade
sealant. Use caution to insure that the antenna connector is not contaminated
with sealant. Insure that the mounting screws are fully tightened and that the
antenna base is well seated against the gasket. CAUTION: Do not use construction
grade RTV sealant or sealants containing acetic acid. These sealants may damage
the electrical connections to the antenna. Use of these type sealants may void the
antenna warranty.
3.3
CABLE INSTALLATION
A. Route the coax cable to the rack location keeping in mind the recommendations
of Section 2. Secure the cable in accordance with good aviation practice.
B. Trim the coaxial cable to the desired length and install the BNC connector (33000087-00) per the cabling instructions on Figure 3-3. If the connector is provided
by the installer, follow the connector manufacturer's instructions for cable
preparation.
C. Contacts for the 37 and 26 pin connectors must be crimped into the individual
wires of the aircraft wiring harness. The following tables list contact part numbers
(for reference) and recommended crimp tools:
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Contacts
Standard Density Connectors
37 socket connector (J1 on unit)
Garmin p/n
military p/n
Amp
Positronic
ITT Cannon
9 pin connector (on battery pack)
Hi Dens. Connector
26 pin connector (J2 on unit)
20-24 AWG socket contact
18 AWG socket contact
20-24 AWG pin contact
18 AWG pin contact
22-28 AWG pin contact
336-00022-00
M39029/63-368
205090-1
M39029/63-368
031-1007-042
336-00023-00
n/a
n/a
FC6018D
see note
336-00024-00
M39029/64-369
205089-1
M39029/64-369
330-5291-037
336-00025-00
n/a
n/a
MC6018D
see note
336-00021-00
M39029/58-360
204370-2
M39029/58-360
030-2042-000
Tools
Hand
Crimping
Tool
military p/n M22520/2-01
Positronic
9507
ITT Cannon 995-0001-584
Amp
601966-1
Daniels
AFM8
Astro
615717
Standard Density Connectors (size 20 contacts)
Hi Dens. Connector (size 22D)
pin or socket contacts (20-24 AWG)
pin or socket contacts (18 AWG)
pin contacts (22-28 AWG)
positioner
M22520/2-08
9502-5
995-0001-604
601966-5
K13-1
615725
positioner
n/a
9502-11
see note
n/a
K774
see note
positioner
M22520/2-09
9502-3
995-0001-739
601966-6
K42
615724
insert/extract
M81969/1-02
M81969/1-02
980-2000-426*
91067-2
M24308/1-02
M81969/1-02
insert/extract
M81969/1-02
M81969/1-02
274-7048-000*
n/a
M24308/1-02
M81969/1-02
insert/extract
M81969/1-04
M81969/1-04
n/a
91067-1
M24308/18-1
M81969/1-04
* Insert/extract tools from ITT Cannon are all plastic, others are plastic with metal tip.
Non- GARMIN part numbers shown are not maintained by GARMIN and
consequently are subject to change without notice.
NOTE: Alternate contacts for 18 AWG wire: As an alternate to the Positronic
contacts listed (and provided in the install kit), the installer may use contacts
made by ITT Cannon as follows: Socket contact - ITT Cannon p/n: 031-10007001, Pin contact - ITT Cannon p/n: 330-5291-055. These contacts require the
use of a different crimp tool positioner than that shown in the table, with part
numbers as follows: Daniels p/n: K250, Astro p/n: 616245, or ITT Cannon p/
n: 980-00005-722.
See Appendix B for information regarding obsolete stamped type contacts.
3.4
RACK INSTALLATION
A. Figure 3-4 shows outline dimensions for the aviation rack. Install the rack in
a rectangular 6.320" x 2.000" hole in the instrument panel. Exercise caution
when installing the rack into the instrument panel. The rack is designed to
facilitate removal of the GNC 300 for portable use. Deformation of the rack may
make it difficult to install and remove the GNC 300.
B. Install the rack in the aircraft panel using four #6-32 countersunk screws and
four self-locking nuts or other FAA approved methods as per Advisory Circular
43.13-1A. The screws are inserted from the inside through the holes in the sides
of the rack (see Figure 3-5).
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3.5
GNC 300 INSTALLATION AND REMOVAL
The GNC 300 is installed in the rack by gently sliding it straight in until it rests
against the back of the rack. A 3/32 inch hex drive tool is then inserted into the
access hole at the bottom of the unit face. Rotate the hex tool clockwise while
pressing on the left side of the Bezel until the unit is firmly seated in the rack.
To remove the unit from the rack, insert the hex drive tool into the access hole on the
unit face and rotate counter-clockwise until the mounting screw turns freely and the
unit protrudes about 3/8 inch from the panel.
Be sure not to over tighten the unit into the rack. The application of hex drive tool
torque exceeding 15 in*lbs can damage the locking mechanism.
3.6
COMM ANTENNA INSTALLATION CHECK
Check for insertion loss and VSWR. VSWR should be checked with an in-line type
wattmeter inserted in the coaxial transmission line between the transceiver and
the antenna. Any problem with the antenna installation will most likely be seen
as a high reflected power. A VSWR of 3:1 will result in a 25% loss in power.
SECTION 4 POST INSTALLATION CONFIGURATION & CHECKOUT
PROCEDURE
Before starting the below operations, unit initialization must occur. Do this by first
removing any data cards and then turning the unit on. Press enter in response to
“Select operating mode Normal ok?”. Press enter in response to “No Jeppesen
database rte/prx limited to user wpts ok?”. After the satellite status page is displayed
for 5 seconds the unit may be turned off. Proceed with the following steps.
4.1
TEST MODE OPERATIONS
With power applied to the aviation rack and the GNC 300 unit off, depress and hold
the ENT key and turn the unit on (release the ENT key when the display activates).
The first page displayed is the Display Test Page. While in TEST MODE, test pages
can be selected by ensuring the cursor is off and rotating the outer knob either
direction. To change data on the displayed test page, depress the CRSR key and the
cursor will highlight the standby COMM frequency. Press cursor again to move to
configuration selections. The inner knob will change the data on the selected field.
The ENT key or the outer knob will advance to the next field on the page. Pressing the
CRSR key again will stop the current field from flashing, allowing the outer knob to
select the next test page. The ENT key is used to enter a new value into the OBI data
field after selecting the desired value using the inner and outer knobs (see the
appropriate chapter of the Pilot's Guide for more information on page and data
selection). Note that some pages found in test mode are intended for bench testing
and are not discussed here.
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 15
4.2
INSTALLATION CONFIGURATION
Note that the below pages are in the order found when rotating the outer knob
clock-wise starting at the Display Test Page. See Section 4.1 to get to this page.
4.2.1 DISPLAY ADJUSTMENT
This page allows the setting of display parameters that affect the display brightness
in automatic mode.
“response time” sets the speed with which the brightness responds to ambient light
changes.
The higher the number the slower the display responds.
“min” sets the minimum brightness of the display. The higher the number the
brighter the minimum brightness.
“slope” sets the sensitivity the brightness of the display has to changes in ambient
light. The higher the number the brighter the display will be for a given increase
in ambient lighting.
4.2.2 I/O CHANNEL 1
Select the I/O CHANNEL 1 Test Page. Change the selectable input and output to
match that of the installed equipment. The available options are:
Input:
Field
off
icarus-alt
shadin-alt
shadin-fuel
arnav/ei-fuel
shadin-adc
shadin-fadc
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190-00067-02 Rev. J
Page 16
Description
No units connected to Channel 1 input
Serial altitude received from:
Icarus, Model 3000, Mode C Serializer
Serial altitude received from:
Shadin 9000T Serializer System (Non-TSO'd)
Shadin 9200T Series Serializer System (Non-TSO'd)
Shadin 8800T Series Encoder System (TSO'd)
Fuel information received from:
Shadin 91204XT Series Digital Fuel Management System
(TSO'd)
Shadin 91053XT Series Digital Fuel Management System
(TSO'd)
Fuel information received from:
Arnav, Model FC-10, Fuel Computer (TSO'd)
Arnav, Model FT-10, Fuel Totalizer (TSO'd)
Electronics International, Model FP-5L, Fuel Flow
Computer (Non-TSO'd)
Air data information received from:
Various models from the 9628XX-X family
Fuel/Air data information received from:
Various models from the 9628XX-X family
Note: Verify with manufacturer of data input device that unit supports GARMIN
interface.
Output:
Field
off
aviation
Description
No units connected to Channel 1 output
Serial position, velocity and navigation data to:
Argus, Model 3000, Moving Map
Argus, Model 5000, Moving Map
Argus, Model 7000, Moving Map
Stormscope, Series II with Navaid, Moving Map
Shadin, 91204X[T] Digital Fuel Management System
(TSO'd)
Shadin, 91053X[T] Digital Fuel Management System
Electronics International, Model FP-5L, Fuel Flow
Computer (Non-TSO'd)
Shadin, Model 9628XX-X Fuel/Airdata Computer
(TSO'd)
GARMIN, GPS 195
GARMIN, GPS III
4.2.3 RS-422 CHANNEL
Select the RS-422 Channel Test Page. Change the selectable input and output to
match that of the installed equipment. The available options are:
Input:
Field
off
Collins PL2 DSP
Description
No units connected to the RS-422 input
Collins Pro Line 2 Display Select Panel connected
Output:
Field
off
Description
NO AVAILABLE SELECTIONS
4.2.4
ARINC 429 CHANNEL
Select the ARINC 429 Channel Test Page. Change the selectable output to match that
of the installed equipment. The available options are:
Input:
Field
off
Selected Course
Course/heading
Heading
Description
No units connected to ARINC 429 input
Any ARINC 429 compatible unit that transmits the
“Selected Course” word (label 100)
Any ARINC 429 compatible unit that transmits the
“Selected Course” (label 100), as well as the “True
heading” (label 314) and/or “Magnetic heading” (label
320) words
Any ARINC 429 compatible unit that transmits the
“True heading” (label 314) and/or “Magnetic heading”
(label 320) words
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 17
Output:
Field
off
Collins PL2 EFS
King EFS 40/50
w/o GAMA labels
Description
No units connected to ARINC 429 output
Collins Pro Line 2 EFIS connected (w/ GAMA)
King Radio EFIS 40 or 50 connected (w/ GAMA)
Any unit that receives standard 429 output
Below is a list of labels output by the GNC 300:
Navigation/position data
Label
(octal)
Description
100
114
115
116
121
251
252
310
311
312
313
314
320
147*
261*
275*
326*
351*
352*
Selected course
Desired track
Bearing to waypoint
Cross track error
Horizontal command (to autopilot)
Distance to go
Time to go
Present position latitude
Present position longitude
Ground speed
Ground track
True heading
Magnetic heading
Magnetic variation
GPS navigation mode
Navigation status
Lateral scale factor
Distance to destination
Time to destination
Flight plan data
Label
(octal)
074*
075*
113*
300*
303*
304*
305*
306*
307*
Description
Flight plan header
Active from/to waypoints
Message checksum
Station magnetic variation/type/class
Message length/type/number
Waypoint identifier characters 1-3
Waypoint identifier characters 4-6
Waypoint latitude
Waypoint longitude
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190-00067-02 Rev. J
Page 18
Identification data
Label
(octal)
Description
377
371*
Equipment identifier
General Aviation equipment identifier
*These labels are formatted per the General Aviation Manufacturers Association
(GAMA) definition. Note that the use of a 429 device w/o GAMA will cause the loss
of the above asterisked labels. Some may be required for A1 certification. For
example, label 326 changes the CDI scale for approach.
4.2.5 CDI CALIBRATION
Select the test page displaying CDI output calibration. Place the cursor on the
alignment field by using the outer knob. Use the inner knob to adjust the CDI needle
until it is centered. Once centered, turn the cursor off to complete the calibration
process.
4.2.6 SELECTED COURSE CALIBRATION
Select the test page displaying the selected course input. Using an extremely accurate
input source, input 150° to the GNC 300. The input course will indicate close to 150
and a “Calib?” field will appear in the lower right corner. Selecting the “Calib?” field
will calibrate the GNC 300 to match the input source. Verify OBS operation by
checking that the bearing displayed on the GNC 300 is within 2° of the selected
bearing. Do this for every multiple of 30° around the OBS.
4.2.7 APPROACH SETTINGS
Select the Approach Settings Test Page. Move the cursor over the approach switch
field to change the installation state.
The available options are:
Appr switch: Field
none
instld
Description
The approach switch is not present
The approach switch is installed
NOTE: To verify the installation of the approach switch, the “instld”
setting requires the approach switch to be pressed to confirm its
presence. The following prompt is displayed in this case: “press appr
switch to confirm” along with a “?” following “instld”. When the switch
press is recognized the prompts are cleared and the “instld” setting is
confirmed.
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 19
4.2.8 CONFIGURATION
Select the Configuration Test Page. Change the selectable Strap and Fuel selections
to match that of the aircraft. The available options are:
Strap:
Field
Description
Lnav 1
Lnav 2
common
Number 1 (Pilot) long range NAV
Number 2 (Co-Pilot) long range NAV
Common long range NAV
NOTE: The strap option affects the interpretation of RS-422 and ARINC 429
input data
For RS-422 input data the following applies:
Lnav 1
Lnav 2
common
Only data marked for Lnav 1 is used
Only data marked for Lnav 2 is used
Data marked for either Lnav 1 or Lnav 2 is used
For ARINC 429 input data the following applies:
Lnav 1
Lnav 2
common
Only data with SDI=0 or SDI=1 is used
Only data with SDI=0 or SDI=2 is used
Only data with SDI=0 is used
NOTE: SDI=0 is an “all call”.
Fuel:
av gas
Jet A
Jet B
Using Aviation gas (5.8 lbs/gal)
Using Jet A/Jet A-1 fuel (6.7 lbs/gal)
Using Jet B (JP-4) fuel (6.5 lbs/gal)
NOTE: The Fuel option is used to designate the type of fuel used so that the
correct fuel density will be used in calculations.
4.2.9
REMOTE BATTERY SETTINGS
Remote Battery: none
instld
NOTE: If “instld” is selected when a battery is not installed erroneous
voltages will be shown on the Power Test page and invalid battery messages
will be issued in normal operating modes.
Low Battery:
selectable between 8.0 volts and 9.6 volts by 0.2 volt steps
NOTE: In normal operating modes, The “Battery Low” message will be
issued when the battery voltage is below the low battery value. The default
value is 9.0 volts.
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 20
4.2.10 I/O CHANNEL 2
Note: This page is not found in the Test Pages but is included here to aid installation.
For more information see SET pages in the Pilot's Guide (GPN 190-00067-00).
Select the I/O CHANNEL 2 Set Page. Change the selectable input and output to match
that of the installed equipment. The available options are:
Input:
Field
off
Description
NO AVAILABLE SELECTIONS
Output:
Field
off
plotting
Description
No units connected to Channel 2 output
Serial position, velocity, navigation and satellite data to:
NMEA 0183 Version 2.0 compatible mapping device or
GARMIN PC software.
NOTE: Below is a list of the NMEA 0183 sentences (with maximum number of
characters) that the GNC 300 transmits.
RMC
-70 characters
GGA
-72 characters
GSA
-57 characters
GSV
-140 characters (70 characters x 2 sentences)
RMB
-70 characters
BOD
-35 characters
WPL
-38 characters
*PGRME
-35 characters
*GARMIN proprietary accuracy error sentence that is not a part of the NMEA
0183 standard.
4.3
GROUND TEST
The GNC 300 ground test procedure incorporates a series of display pages to test CDI/
flag, OBI, annunciators, external switches, altitude inputs, and power functions of the
unit.
Note that the below pages are in the order found when rotating the outer knob counterclockwise starting at the Display Test page. See Section 4.1 to get to this page.
4.3.1 POWER TEST
Select the Power Test page. This page reports the status of the GNC 300 external power
source, remote battery and internal memory battery.
In the below “voltage”
represents the voltage currently measured for that function.
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 21
The first line, below the COMM frequencies, shows the source of external power as
shown below:
External Power “voltage”
Battery Power
Wall Adapter
The presence of a Wall Adapter will override the other two sources. Battery Power will
not be shown unless on the Remote Battery Settings Page the Remote Battery is
selected as “instld”. The higher voltage of External Power or Battery Power will
determine which is shown.
The next line shows the status of the Remote Battery as shown below:
Rmt Bat none (If on the Remote Battery Settings Page Remote Battery is selected as
none)
Rmt Bat “voltage” “mode” “auto status”
“mode” represents the mode of the charger enable to the remote battery pack and is
selectable. “On” enables the charger. “Off” disables the charger. “Auto” enables the
charger if the External Power is the current source and its voltage is high enough.
When in “Auto” mode “auto status” will be either “on” or “off” reflecting whether the
charger is enabled or disabled.
The next line reports the status of the internal memory battery as shown below:
Mem Bat ok/low.
Note that the “TX” field will light on the display but the transmitter will not actually
transmit when the GNC 300 is powered from the wall charger.
4.3.2 CDI AND FLAG TEST
Select the CDI Test Page. Using the controls on the GNC 300 front panel, make the
selections indicated below and verify the interfaces as appropriate:
CDI
Full scale left
Full scale right
Centered
Ensure the CDI is deflected full scale left (5 dots)
Ensure the CDI is deflected full scale right (5 dots)
Ensure the CDI is centered
TO/FROM/FLAG
TO
FROM
FLAG
Ensure TO flag is visible
Ensure FROM flag is visible
Ensure TO and FROM are NOT visible
CDI FLAG
IN VIEW
OUT OF VIEW
Ensure CDI flag is in view
Ensure CDI flag is out of view
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Page 22
SUPERFLAG
IN VIEW
OUT OF VIEW
Ensure superflag in view
Ensure superflag out of view
4.3.3 ANNUNCIATOR TEST
Select the Annunicator Test Page. Using the controls on the GNC 300 front panel make
the selections indicated below and verify the interfaces as appropriate:
MSG Annunciator
OFF
ON
Ensure the Message Annunciator is OFF
Ensure the Message Annunciator is ON
Arrival Annunciator
OFF
ON
Ensure the Arrival Annunciator is OFF
Ensure the Arrival Annunciator is ON
Approach Annunciator
OFF
ACTV
ARM
Ensure all Approach Annunciators are OFF
Ensure the Approach Active Annunciator is ON (Arm
is OFF)
Ensure the Approach Arm Annunciator is ON (Active
is OFF)
4.3.4 EXTERNAL SWITCH TEST
Select the External COM Switches Page. For each of the following installed remote
switches perform the following:
Press Remote Enter and verify the Rmt ent field changes from off to on.
Press PTT and verify the PTT field changes from off to on.
Press Remote Transfer and verify the Rmt xfr field changes from off to on.
Next, select the External Switches Page. For each of the following installed remote
switches perform the following:
Press GPS Appr and verify the “appr” field changes from off to on.
Press GPS Sequence and verify the “hold” field changes from off to on.
4.3.5 COMMUNICATIONS LOOPBACK TEST
This page displays the results of communication loop back tests. Four channels are
tested: RS232 channels 1 and 2, RS 422 and ARINC 429. Results of the test are either
“OPEN” or “OK”. Open means the channel's transmitter and receiver are not
connected or the test failed. The tests are performed continuously while on this page
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 23
except for RS232 channel 2. This channel is only tested at power on and the results
displayed on this page. Therefore the unit must be turned off and the receiver/
transmitter connected or disconnected and then turn the unit on to perform the test.
To test the channels:
RS232 channel 1:
RS232 channel 2:
RS422:
ARINC 429:
Connect RS232 channel 1 receiver and transmitter
Connect RS232 channel 2 receiver and transmitter
Connect RS232 channel 1 to RS422 LOW (pin 27) and
ground RS422 HI (pin 11)
Connect ARINC 429 receiver and transmitter
4.3.6 ALTITUDE INPUT TEST
Select the Gray Code Altitude Test Page if this input is used. Verify that the altitude
input is reading the correct altitude. NOTE: This does not display serial altitude.
4.3.7 OBI TEST
Select the OBI Test Page. Using the controls on the GNC 300 front panel, make the
selections indicated below and verify the interfaces as appropriate:
OBI Data
VALID
INVALID
OBI Value
Ensure that the OBI indicates the proper value
Ensure the OBI is invalid
Ensure that the OBI displays the value entered when
the VALID option is selected
NOTE: The 3 lines that make up the OBI interface may be toggled individually. This
may be done from the “Value” field. Cycle this field to the desired line (either CLOCK,
DATA or SYNC) and toggle the output to HIGH or LOW.
4.3.8 SIGNAL ACQUISITION TEST
The Self Test Page will be displayed followed by the Data Base Page. Upon approval
of the Data Base Page, the Satellite Status Page will be displayed. If unable to acquire
satellites, relocate the aircraft away from obstructions which might be shading
reception. If the situation does not improve, check the antenna installation.
Once GPS position information is available, use the DIRECT-TO key to activate the
navigation function to a nearby NAVAID, intersection, or airport. Ensure any
connected equipment is transmitting data to and/or is receiving data from the GNC
300 and is functioning properly (see the Pilot's Guide for more information on the
DIRECT-TO function).
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 24
4.3.9 VHF COMM INTERFERENCE CHECK
a)
Go to the Satellite Status Page, verify that 7 to 8 satellites have been
acquired
b) See that the “NAV” flag is out of view
c)
Select 121.15 MHZ on COMM1
d) Transmit for a period of 20 seconds
e)
Verify that the flag does not come into view
f)
Repeat steps d) and e) for the following frequencies:
121.175, 121.20, 131.250, 131.275 and 131.300
g)
Repeat steps c-f for all COMMs installed in the aircraft
h) If the “NAV” flag comes into view, refer to Section 2.1.5 for options to improve
performance.
4.3.10 VHF COMM CHECK
A flight test is recommended after the installation is completed to insure satisfactory
performance. To check the communications transceiver, maintain an appropriate
altitude and contact a ground station facility at a range of at least 50 nautical miles.
Contact a ground station close in. Press the squelch disable button to defeat the
automatic squelch feature and listen for any unusual electrical noise which would
reduce the COMM receiver sensitivity by increasing the squelch threshold. If possible,
verify the communications capability on both the high and low end of the VHF COMM
band.
SECTION 5 CERTIFICATION
The GNC 300 is certified for IFR enroute, terminal and non-precision approaches.
The GNC 300's initial certification was accomplished via a STC by GARMIN in a
Mooney M20J. See Appendix C for a copy of the STC.
All installations must be certified. For more information, see FAA Advisory Circular
“Airworthiness Approval of Global Positioning System (GPS) Navigation Equipment for
use as a VFR and IFR Supplemental Navigation System”, Appendix 1. All new
certifications after GARMIN's Mooney installation will be “Follow-On”.
SECTION 6 CONTINUED AIRWORTHINESS
Maintenance of the GNC 300 is on condition only. Periodic maintenance of the GNC
300 is not required.
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 25
FIGURE 1-1 PINOUT DEFINITION, 37 PIN DSUB
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 26
FIGURE 1-2 PINOUT DEFINITION, 26 PIN HD-DSUB
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 27
FIGURE 1-3A INTERCONNECT SCHEMATIC
Av. Kit Install. Manual
190-00067-02 Rev. J
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FIGURE 1-3B INTERCONNECT SCHEMATIC
Av. Kit Install. Manual
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FIGURE 1-3C INTERCONNECT SCHEMATIC
Av. Kit Install. Manual
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Page 30
FIGURE 1-4 INTERCONNECT SCHEMATIC NOTES
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 31
Antenna masked by vertical
T tail, or dorsal fin
fin,
OK
Antenna must be
top of aircraft.
on
FIG 2-1
GPS ANTENNA INSTALLATION CONSIDERATIONS
Maintain 6"(16 cm)
compass safe distance
ACTV
GARMIN GNC 250
STBY
CLR ENT
CRSR
SQ
D
NRST
RTE
WPT
NAV
MSG
FIG 2-2
GNC 300 INSTALLATION CONSIDERATIONS
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 32
FIGURE 2-3 SWITCH/ANNUNCIATOR LAYOUT
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 33
FIG 3-1
STUD MOUNT GA 56 ANTENNA INSTALLATION
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 34
FIGURE 3-2
FLANGE MOUNT GA 56 ANTENNA INSTALLATION
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 35
FIGURE 3-3 COAX CABLE INSTALLATION
Av. Kit Install. Manual
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Page 36
FIGURE 3-4 AVIATION RACK DIMENSIONS
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 37
FIGURE 3-5 AVIATION RACK INSTALLATION
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 38
APPENDIX A CERTIFICATION DOCUMENTS
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APPENDIX B CONNECTOR CHANGES
STAMPED CONTACT CONNECTOR USAGE
Garmin panel mount GPS radios have previously been shipped with stamped crimp type contacts. All
products are now being shipped with machined mil-spec contacts with color-coded barrels. The following
figures can be used to identify which type contact you have:
Some contacts are pins as shown, while others are the socket type. The type used will vary with the
installation. When working with the stamped crimp type contacts, the following tools should be used:
Tools
supplier
Amp
ITT Cannon
Cinch
37 and 9 position connectors
Crimp Tool
Extraction Tool
58448-2
91067-22
995-2000-000
980-0008-124
HTD-544
CIET-20-HDB
26 position connector
Crimp Tool
Extraction Tool
90430-1
91285-1
995-2000-022
980-00004-804
HTD-544
HTD-520
Part numbers shown are not maintained by Garmin and consequently are subject to change without notice.
Special considerations must be made for aircraft power and remote battery (optional) connections, as shown
in the following diagram:
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REMOTE BATTERY PIN ASSIGNMENTS
A change was made to the remote battery connectors starting with serial numbers 33050055. Units with
lower serial numbers have pin contacts on the battery pack. Units 33050055 and up use socket contacts on
the battery and the pin number assignments are different, however the individual contact locations are
unchanged. The following table shows the pin assignments for the two different types of connectors:
Serial Number
remote batt.
mating plug
function
battery +
battery +
charge enable
aircraft power
aircraft power
no connection
no connection
ground
ground
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below 33050055
33050055 and up
pins
sockets
sockets
pins
contact number
contact number
1
2
3
4
5
6
7
8
9
5
4
3
2
1
9
8
7
6
APPENDIX C STC PERMISSION
Consistent with N8110.69 or Order 8110.4, Aviation Authority approved installers
are hereby granted permission to use STC# SA00372WI data to modify aircraft.
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 45
Av. Kit Install. Manual
190-00067-02 Rev. J
Page 46