Cabling And Wiring - Garmin GTX 32 Installation Manual

2.4

Cabling and Wiring

Use MIL-W-22759/16 or other approved wire, AWG #24 or larger wire for all interface connections. The
standard pin contacts supplied in the connector kit are compatible with up to AWG #22 wire. In cases
where some installations have more than one unit sharing a common circuit breaker, sizing and wire
gauge is based on aircraft circuit breaker layout, length of wiring, current draw of units, and internal unit
protection characteristics. Do not attempt to combine more than one unit on the same circuit breaker
unless it is specified on aircraft manufacturer approved drawings.
In some cases, a larger gauge wire such as AWG #18 or #16 may be needed for power connections. If
using #16 or #18 barrel contacts, ensure that no two contacts are mounted directly adjacent to each other.
This minimizes the risk of contacts touching and shorting to adjacent pins or to ground.
Ensure that routing of the wiring does not come in contact with sources of heat, RF or EMI interference.
Check that there is ample space for the cabling and mating connectors. Avoid sharp bends in cabling and
routing near aircraft control cables.
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, including connectors.
The following table is for reference only, and lists some suitable cable types, along with the maximum
length based on an assumed loss figure of 0.2 dB per connector. Any 50 Ω, double shielded coaxial cable
assembly that meets airworthiness requirements and the 1.5 dB maximum loss figure (including
connectors) may be used.
Max. Length Insertion loss
(feet – [m])
6' 1.3" [1.86m]
7' 7.3" [2.32m]
9' 2.0" [2.79m]
12' 6.0" [3.81m]
15' 5.4" [4.71m]
19' 9.4" [6.03m]
30' 3.6" [9.24m]
Supplier
Information
Page 2-4
Revision F
ECS Type
(dB/100ft)
18.0
14.45 3C142B
12.00
8.80 311601
7.12 311501
5.56 311201
3.63 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-RG400
M17/112-RG304
M17/127-RG393
See current issue RG types are
of Qualified obsolete and
Products List are shown for
QPL-17. reference only;
replaced by
M17 type
numbers.
GTX 32 Installation Manual
RG Type
RG-400
RG-304
RG-393
190-00303-60