Overview; Section 7 - Antennas; Mounting Location; Gps Antenna (An145) - NorthStar 8700 Technical Reference Manual

7.1 Overview

7.2 GPS antenna (AN145)

7.2.1 Description

7.2.2 Dimensions

7.2.3 Cables

7.2.4 Mounting
location
05/01/97 REV H

Section 7 - Antennas

Northstar offers a variety of antenna options to suit any application. The
Northstar sensors' standard antenna system consists of the following:
antenna
•
antenna coupling unit (ACU) that provides impedance-matching cir-
•
cuitry for the antenna, and serves as a mounting base
coaxial cable connecting the ACU to the sensor
•
Antennas are sold separately from the sensors, since customers' needs
vary as to antenna reception, cable length, and so on; however, the 8801
and 8901 are the two exceptions to this rule. The 8801 is shipped with
the Northstar AN195 H-field antenna, and the 8901 is shipped with the
Northstar AN200 GPS/DGPS antenna. See Section 3, "Packaging," to deter-
mine which antennas are appropriate for your particular sensor.
The Northstar AN145 is a passive GPS antenna that's shipped with 25 feet
of RG-59U coaxial cable.

FIGURE 4 - Northstar AN145 antenna

The AN145 antenna doesn't operate properly with an antenna cable over
25 feet. If you require an antenna cable over 25 feet, contact Northstar
about substituting the AN150 antenna.
For land-based applications, mount the AN145 near the top of the vehi-
cle, where a clear and unobstructed view of the horizon is available in all
directions.
Section 7 - Antennas
A N T EN N A
O -RING
A D AP TE R
CAPTIVE SCREW
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