Garmin GTX 325 User Manual

190-01499-02 GTX 3x5 TSO Installation Manual
Rev. 1 Page 3-5
3.4.4 GA 36 Antenna
Antenna includes four 10-32 UNF-2A x 1.00" SS 303 mounting screws and one O-ring.
An antenna doubler may also be required. Refer to appropriate antenna installation data.
To secure the antenna, four #10 washers and four #10 self-locking nuts are required. Suitable nut plates
may be secured to the doubler. Torque the four supplied #10-32 stainless steel screws 20-25 in-lbs. To
avoid deformation of the mounting area, torque should be evenly applied across all mounting screws.
To connect the GPS antenna coax cable, a TNC plug is required.
3.4.5 GA 37 Antenna
Antenna includes four 10-32 UNF-2A x 1.00" SS 303 mounting screws and one O-ring.
An antenna doubler may also be required. Refer to appropriate antenna installation data.
To secure the antenna, four #10 washers and four #10 self-locking nuts are required. Suitable nut plates
may be secured to the doubler. Torque the four supplied #10-32 stainless steel screws 20-25 in-lbs. To
avoid deformation of the mounting area, torque should be evenly applied across all mounting screws.
To connect the GPS antenna coax cable, a TNC plug is required.
3.4.6 A33W Antenna
Antenna includes four 6-32 UNC-2A x 1.00" SS 303 mounting screws and one O-ring.
An antenna doubler may also be required. Refer to appropriate antenna installation data.
To secure the antenna, four #6 washers and four self-locking nuts are required. Suitable nut plates may be
secured to the doubler. Torque the four supplied #6 stainless steel screws 3-5 in-lbs. To avoid deformation
of the mounting area, torque should be evenly applied across all mounting screws.
To connect the GPS antenna coax cable, a TNC plug is required.
3.5 Installation Materials Required But Not Supplied
The GTX 3x5 is installed with standard aviation materials. The following items are required for
installation, but not supplied.
• Wire (MIL-W-22759/16 or equivalent)
• Shielded wire (MIL-C-27500 or equivalent)
• Aircraft grade category 5 Ethernet cable (Required for installations utilizing the HSDB interfaces)
• Mounting hardware
• Circuit breaker of appropriate rating
• Tie wraps and/or lacing cord
• Ring terminals (for grounding)
• Coaxial cable (RG-400 or equivalent – see section ?? for more information)
• Coax connectors – BNC connectors for the transponder antenna and TNC connectors for the GPS
antenna
• Pressure altitude source (must meet ??)
Options for pressure altitude source:
• Optional pressure sensor module
• RS-232 serial input
• ARINC 429 input
• Parallel Gray code input

Garmin GTX 325 Specifications

General

Brand	Garmin
Model	GTX 325
Category	Marine Radio
Language	English