NorthStar 961x 用户手册

SECTION TWO - Installation

961 INSTALLATION MANUAL Revision A

Page 7

To ensure a proper installation, it is highly recommended that you per-
form all of the following activities before starting the installation:

preview/survey the vessel’s layout and existing equipment

review all the installation materials

review all the installation requirements, including:

- the physical requirements (spacing, location with regard to other 

equipment, etc.) 

- the electrical and electronic requirements (interference between 

other pieces of equipment, power requirements, etc.) 

Although the unit itself is very straightforward and easy-to-understand, it 
has a few basic requirements that must be met before safe and proper 
operation can be assured. The major parts of the rest of this section 
address several topics regarding the minimum installation requirements 
for the unit to:

minimize electrical wiring hazards

be mounted correctly

accurately receive GPS and DGPS signals

navigate safely

The majority of installation problems are caused by shortcuts taken with 
system cables. When installing your 961, be sure to:

assemble the connectors carefully

don’t make sharp bends in the cables 

leave service and drip loops 

tie-wrap all cables to keep them secure 

if cables are lengthened, seal all wiring splices

The “active” GPS antenna is best mounted in the clear, and low on the 
vessel to avoid extra motion from pitching and rolling. It should be 
mounted lower than directional high-power transmitting antennas such 
as radar or satcom. The length of coaxial cable to the “active” AN150 
antenna (supplied with the unit) must be a minimum of 20 feet, but not 
more than 100 feet. Coil up any unused length of cable; do not cut it to 
less than 20 feet!

 Be sure that all cable connectors are securely fastened, 

and that the cable itself is not subject to any tight bends.

For complete details about installing the AN150, see “Installing the 
antenna” beginning on page 14.