Cable Installation; Figure 3-1. Coaxial Cable Installation - Garmin GNC 420A Installation Manual

Do not use construction grade RTV sealant or sealants containing acetic acid. These
sealants may damage the electrical connections to the antenna. Use of these type sealants
may void the antenna warranty.
3.6

CABLE INSTALLATION

1. Route the coaxial cable to the rack location keeping in mind the recommendations of Section 2.
Secure the cable in accordance with good aviation practice.
2. Trim the coaxial cable to the desired length and install the BNC connector (330-00087-00) per
the cabling instructions on Figure 3-1. If the connector is provided by the installer, follow the
connector manufacturer's instructions for cable preparation.
3. The card-edge connector may be used to terminate shield grounds to the 400 Series back plate.
4. Feed wires through the connector backshells before insertion into the 78, 44, and 25 pin connectors.
5. Contacts for the 78, 44 and 25 pin connectors must be crimped onto the individual wires of the aircraft
wiring harness. The following tables list contact part numbers (for reference) and recommended crimp
tools:
400 SERIES INSTALLATION MANUAL
190-00140-02
CAUTION

Figure 3-1. Coaxial Cable Installation

CAUTION
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