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.
© 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.
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.
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 Av. Kit Install. Manual 190-00067-02 Rev.
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.
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.
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.
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.
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).
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.
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.
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.
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.
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.
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.
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.
Note: Verify with manufacturer of data input device that unit supports GARMIN interface.
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 Horizont
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.
4.2.8 CONFIGURATION Select the Configuration Test Page. Change the selectable Strap and Fuel selections to match that of the aircraft.
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 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.
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.
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.
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.
FIGURE 1-1 PINOUT DEFINITION, 37 PIN DSUB Av. Kit Install. Manual 190-00067-02 Rev.
FIGURE 1-2 PINOUT DEFINITION, 26 PIN HD-DSUB Av. Kit Install. Manual 190-00067-02 Rev.
FIGURE 1-3A INTERCONNECT SCHEMATIC Av. Kit Install. Manual 190-00067-02 Rev.
FIGURE 1-3B INTERCONNECT SCHEMATIC Av. Kit Install. Manual 190-00067-02 Rev.
FIGURE 1-3C INTERCONNECT SCHEMATIC Av. Kit Install. Manual 190-00067-02 Rev.
FIGURE 1-4 INTERCONNECT SCHEMATIC NOTES Av. Kit Install. Manual 190-00067-02 Rev.
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.
FIGURE 2-3 SWITCH/ANNUNCIATOR LAYOUT Av. Kit Install. Manual 190-00067-02 Rev.
FIG 3-1 STUD MOUNT GA 56 ANTENNA INSTALLATION Av. Kit Install. Manual 190-00067-02 Rev.
FIGURE 3-2 FLANGE MOUNT GA 56 ANTENNA INSTALLATION Av. Kit Install. Manual 190-00067-02 Rev.
FIGURE 3-3 COAX CABLE INSTALLATION Av. Kit Install. Manual 190-00067-02 Rev.
FIGURE 3-4 AVIATION RACK DIMENSIONS Av. Kit Install. Manual 190-00067-02 Rev.
FIGURE 3-5 AVIATION RACK INSTALLATION Av. Kit Install. Manual 190-00067-02 Rev.
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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.
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.
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.
Av. Kit Install. Manual 190-00067-02 Rev.