Revision G
October 14, 1996 9
SECTION III
3. INSTALLATION
3.1. GENERAL
This section contains all necessary installation instructions and check-out procedures for the
Terra by Trimble TRI NAV Course Deviation Indicator. For the installer with little or no
experience of installing avionics, Section 3.3 provides important information. Trimble
recommends reading this section before continuing with installation.
3.2. PREPARATION FOR USE
Every precaution has been taken to protect the TRI NAV during shipment. Upon receipt of
the equipment, perform the following inspections:
1. Remove the unit from the shipping container and visually inspect for damage.
2. Check controls and switches to determine if they may have been damaged.
3. Make sure that all hardware and connectors listed in Section I, under “Equipment
Supplied” are present.
If the unit is damaged, a claim must be filed with the carrier. The carrier assumes title of the
unit when accepted for shipment. Do NOT return the unit to Trimble or its representatives.
It is suggested that the package be retained for inspection by the carrier in the case of damage
or for future use should it be necessary to ship the unit for service or to transfer it to another
location.
3.3 GENERAL INSTALLATION INSTRUCTIONS FOR AVIONICS
The following paragraphs contain pertinent hints, advice, and guidance intended for use by
installers of avionics equipment. These have been drafted to address common problems
encountered during the installation process. Specific questions may be addressed to Trimble
for technical assistance by calling 1-800-487-4662 and requesting Technical Assistance.
3.3.1 COAXIAL CABLES AND CONNECTORS
Improper installation of coaxial cables and connectors create many of the problems
encountered during avionics installations. Problems to avoid include twisted, chafed,
or pinched cables, sharp bends in cables, open or shorted center conductors or shield
braid, and improper grounding of shields. Also, proper termination of antenna
coaxial cables at the antenna should be carefully checked. After installing
connectors, pull firmly to ensure good mechanical bonding (particularly if you use
crimp-on connectors) and use your ohmmeter to insure good electrical connection
with no shorting. Be sure that coax lengths and types follow the avionics
manufacturer’s recommendations.
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