Contents - gdu 37x
- aviation limited warranty
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Section 1 GDU 37X Installation Overview
- System Overview
- Table 1-3 GDU 37X LRU Power Requirements
- Mounting
- Figure 1-1. TNC Connector Installation
- Section 2 GDU 37X
- Electrical Specifications
- Table 2-4 GDU 37X Supported Antennas
- Environmental Specifications
- Figure 2-2. GDU 37X Mounting Accessories
- Installation Considerations
- Figure 2-3. GDU 37X Panel Cutout Template
- Section 3 Garmin GPS/XM Antennas
- XM Antennas
- Figure 3-1. Recommended Antenna Placement
- Figure 3-2. Carbon/Glass Buried Antenna Area
- Figure 3-3. Glare Shield Buried Antenna Area
- Teardrop Footprint Antenna Installation (GA 55 and GA 56)
- Figure 3-4. Doubler Design, Teardrop Footprint Antenna, Skin Thickness 0.032" to 0.049"
- Figure 3-5. Doubler Design, Teardrop Footprint Antenna, Skin Thickness 0.049" to 0.051"
- Figure 3-7. Sample Doubler Location, Teardrop Footprint Antenna, Metal Skin Aircraft
- Figure 3-9. Skin Cutout Detail, Teardrop Footprint Antenna, Skin Thickness 0.049" to 0.051"
- Figure 3-11. Doubler Installation, Teardrop Footprint Antenna, Skin Thickness 0.032" to 0.049"
- ARINC 743 Footprint Antenna Installation (GA 55A, GA 57X)
- Figure 3-14. Doubler Design, ARINC 743 Footprint Antenna, Skin Thickness 0.032" to 0.049"
- Figure 3-15. Doubler Design, ARINC 743 Footprint Antenna, Skin Thickness 0.049" to 0.051"
- Figure 3-16. Doubler Design, ARINC 743 Footprint Antenna, Skin Thickness 0.051" to 0.063"
- Figure 3-17. Sample Doubler Location, ARINC 743 Antenna, Metal Skin Aircraft
- Figure 3-19. Skin Cutout Detail, ARINC 743 Footprint Antenna, Skin Thickness 0.049" to 0.051"
- Figure 3-21. Doubler Installation, ARINC 743 Footprint Antenna, Skin Thickness 0.032" to 0.049"
- Figure 3-23. Doubler Installation, ARINC 743 Footprint, Skin Thickness 0.051" to 0.063"
- Non-Structural Mount Installation
- Figure 3-26. Example Bracket Antenna Mounting Under Glareshield
- Figure 3-27. Example Non-structural Antenna Mounting Under Glareshield
- Figure 3-28. Example Teardrop Antenna Installation In Airframe Under Fabric Skin
- Figure 3-30. Example Non-structural Antenna Mounting On Airframe
- Figure 3-31. Example Teardrop Footprint Antenna Mounting Under Fabric Skin
- Section 4 Software, Configuration, Databases, and XM Activation
- Software Loading Procedure
- Configuration Pages
- acft configuration page
- comm configuration page
- Garmin Database Updates
- available databases
- SiriusXM® Activation Instructions (GDU 375 only)
- GDL 39/GDL 39R Software Update
- Section 5 Post-Installation Checkout Procedure
- Appendix A GDU 37X Pinouts
- Table A-2 Aircraft Power
- Table A-5 Lighting
- Appendix B Connector Installation Instructions
- Figure B-1 Shield Install onto a Jackscrew Backshell (78 pin example)
- Figure B-2 Method A.1 for Shield Termination
- Figure B-3 Insulation/Contact Clearance
- Figure B-4 Method A.2 (Daisy Chain) for Shield Termination
- Figure B-5 Method B.1 (Quick Term) for Shield Termination
- Figure B-6 Method B.2 (Daisy Chain-Quick Term) for Shield Termination
- Figure B-7 Daisy Chain between Methods A and B
- Figure B-8 Method C.1 Double-Shield Termination
- Figure B-9 Method C.2 Double-Shield Termination
- Figure B-10 D-Sub Spliced Signal Wire illustration
- Appendix C Outline and Installation Drawings
- Figure C-1.2 GDU 37X Panel Cutout Drawing
- Figure C-2.1 GA 55/55A Installation Drawing
- Figure C-2.2 GA 56 Installation Drawing
- Figure C-2.3 GA 57X Installation Drawing
- Appendix D Interconnect Drawing (example only)
- Figure D-1.2 GDU 37X Interconnect Drawing
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Secondary Method:Solder a Flat Braid (item 4) to the shield exposed through the window of the prepared cable assembly(item 2). Ensure a solid electrical connection through the use of acceptable soldering practices. Usecare to avoid applying excessive heat that burns through the insulation of the center conductors andshorts the shield to the signal wire. Slide a minimum 0.75 inches of Teflon heat shrinkable tubing(item 3) onto the prepared wire assembly and shrink using a heat gun. The chosen size of heatshrinkage tubing must accommodate both the number of conductors present in the cable and the FlatBraid (item 4) to be attached.Teflon Heat Shrinkable Tubing:Reference the following MIL-Spec for Teflon heat shrinkable tubing (M23053/5-X-Y).4. At the same end of the shielded cable (item 2) and ahead of the previous shield termination, stripback “Float Min” to “Float Max” (Table B-3) length of jacket and shield to expose the insulatedcenter conductors (Figure B-2). The “Ideal Float” length may be best to build optimally.Preferred Method:The jacket and shield should be cut off at the same point so no shield is exposed. Slide 0.75 inchesminimum of Teflon heat shrinkable tubing (item 5) onto the cable and use a heat gun to shrink thetubing. The chosen size of heat shrinkage tubing must accommodate the number of conductorspresent in the cable.Secondary Method:
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