NorthStar Navigation GM1708 961XD - Manual (Page 18)

SECTION TWO - Installation
Page 8 961 INSTALLATION MANUAL Revision A
Using DGPS with
an AN150 and
8410 ACU
If the unit is equipped with a differential receiver (and you’re using the
AN150 GPS antenna, not the AN205-P GPS/DGPS combo antenna), this
receiver must be connected to a Northstar 8410 differential Antenna
Coupling Unit (ACU). The ACU’s four-foot whip antenna should be
mounted as high as conveniently possible (but not at the highest point)
and as far away as possible from other antennas. The ACU can be
mounted on a standard marine antenna mount (1" diameter, 14 threads
per inch).
For complete details about installing the AN150/8410 ACU, see “Install-
ing an 8410 ACU (for use with the AN150 only)” beginning on page 22.
Using the DGPS
antenna
(AN205-P)
For complete details about installing the AN205-P, see “Installing the
antenna” beginning on page 14.
Bench-testing the
961
It is recommended that you bench-test the unit before installing it on the
vessel. Bench testing ensures that the equipment is fully operational, and
allows the GPS receiver to collect its almanac and ephemeris data for the
installed location, which results in less on-board installation time.