Figure 16: Acu Assembly - NorthStar 951X Installation Manual

SECTION TWO - Installing the unit
The Northstar 8410 Antenna Coupling Unit (ACU—supplied with a unit
Installing an 8410
that's equipped with a DGPS receiver) is used when you don't want to use
ACU (for use with
the combo AN205-P antenna. Although similar in appearance to North-
the AN150 only)
star loran ACUs, only the unit labeled "8410" will work with the internal
DGPS receiver. The ACU also serves as a sturdy mounting base for the
whip antenna.
The ACU consists of two pieces. The circuitry is sealed in a rugged, water-
proof, fiberglass polycarbonate body, the upper end of which is threaded
to accept a standard 4-foot whip antenna. A large female thread is molded
into the lower portion, or base, of the ACU body into which the upper
half is secured (see Figure 16, "ACU assembly"). A gasket and rubber
O-ring on the upper half provide weathertight sealing when the two
halves are secured. The bottom of the base is threaded (1"–14) to mount
onto an antenna mast or onto a standard deck mount.

Figure 16: ACU assembly

951/952 INSTALLATION MANUAL Revision B Page 23