Antenna Cable Installation; Antenna Cable Connectors; Recommended Antenna Cable Type - Garmin GTX 327 Installation Manual

2.3.4 Antenna Cable Installation

When routing antenna cables, observe the following precautions:
•
All cable routing should be kept as short as possible and as direct as possible.
•
Avoid sharp bends.
•
Avoid routing cables near power sources (e.g., 400 Hz generators, trim motors, etc.) or
near power for fluorescent lighting.
•
Avoid routing cable near ADF antenna cable (allow at least a 12-inch separation).
The following table lists examples of the recommended antenna cable vendors and the type of cable to be
used for specific lengths of cable. Any cable meeting specifications is acceptable for the installation. The
maximum coaxial cable attenuation at 1090 MHz must not exceed 1.5 dB.
Max. Length (feet)
8.8
10.0
12.5
17.0
21.0
27.0
41.0
Supplier Information

2.3.5 Antenna Cable Connectors

One of two rack connectors are provided (item 6 or 12 in the installation drawing, figure B2 on page 39).
RF Adapter item 12 (Garmin P/N 330-00326-00) requires the cable to be terminated to an appropriate
type BNC plug (provided by installer), which is then attached to item 12. Any 50 ohm, double shielded
cable may be used, provided it introduces less than 1.5 dB attenuation at 1 GHz including the connector.
Connector item 6 (Garmin P/N 330-00198-00) requires the cable to be terminated directly to it and can
accommodate only M17/128 (RG-400) cable. The completed cable including connectors must introduce
no more than 1.5 dB attenuation at 1 GHz. Instructions for installing the item 6 are shown below (steps
A-G).
GTX 327 Installation Manual
190-00187-02
Table 2-1. Recommended Antenna Cable Type
ECS Type
3C142B
311601
311501
311201
310801
Vendor: Electronic
Cable Specialists
5300 W. Franklin Drive
Franklin, WI 53132
Tel: 800-327-9473
414-421-5300
Fax: 414-421-5301
www.ecsdirect.com
MIL-C-17 Type
M17/128
M17/112
M17/127
MIL-C-17 types: See
current issue of
Qualified Products List
QPL-17.
RG Type
RG400
RG304
RG393
RG types: See current
issue of Qualified
Products List QPL-17.
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