Installation Instructions

190-01007-A3 GTN 6XX/7XX AML STC Installation Manual
Rev. 4 Page 2-5
2.3.2 Materials Required but not Supplied
2.3.2.1 Accessories Required but not Supplied
The following installation accessories are required for the installation but not supplied by Garmin.
Table 2-13. Accessories Required but Not Supplied
Item Requirements
COM Antenna
(GTN 635/650/750
only)
Shall meet TSO-C37( ) and C38( ) or TSO-C169( ). 50 Ω, vertically polarized
with coaxial cable
NAV Antenna
(GTN 650/750 only)
Shall meet TSO-C40( ) and C36( ). 50 Ω, horizontally polarized with coaxial
cable. Note that if the NAV antenna is a combined VOR/LOC/GS antenna, it
must meet TSO-C40( ), C36( ), and C34( ).
Glideslope Antenna
(GTN 650/750 only)
Shall meet TSO-C34( ). 50 Ω, horizontally polarized with coaxial cable or low-
loss splitter used with the VOR/LOC antenna.
Headphones
500Ω nominal impedance
Microphone Low impedance, carbon or dynamic, with transistorized pre-amp
2.3.2.2 Materials Required but Not Supplied for GTN Installations
The GTN unit and GMA 35 are intended for use with standard aviation accessories. The following items
are required for installation, but not supplied:
• Wire (MIL-W-22759/16 or equivalent) – If MIL-W-22759/18 wire is utilized because the smaller
insulation diameter works better with the high density contacts used in the GTN system, care
must be taken to adequately support and protect the wiring due to its thinner insulation.
• Shielded Wire (MIL-C-27500 cable utilizing M22759/18 wire (TG) or ETFE jacket (14), or
equivalent)
• Aircraft Grade Category 5 Ethernet Cable (required only for installations utilizing HSDB
interfaces such as a second GTN, a GDL 69/69A or the GTS 8XX). See interconnect diagrams in
Appendix E and Appendix F for Ethernet cable part number.
• Mounting Hardware for GTN (8 minimum – NASM24693 Screw, Machine, Flat Countersunk
Head 100°, Cross Recessed with .1380-32 UNC-2A Thread, Corrosion Resistant Steel (alternates
include MS24693 or AN507) and NASM21042 Nut, Self-Locking, Reduced Height with .1380-
32 UNJC-3B Thread (alternates include MS21042 and Monadnack Clip Nut 6-32))
• Push/pull manually resettable circuit breakers (see drawings in Appendix E for circuit breaker
ratings)
• Tie Wraps or Lacing Cord
• Ring Terminals (for grounding and circuit breaker connections)
• Coaxial Cable (RG-400, RG-142B or equivalent – Refer to Section 2.4.11.2 for additional
information)
• Shield Terminators (See Figure 3-2)
• Silicon Fusion Tape, Garmin P/N 249-00114-00