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NorthStar Navigation 961XD Installing an 8410 ACU for use with the AN150 only, Mounting

Models: 961X 961XD

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SECTION TWO - Installation

Installing an 8410 ACU (for use with the AN150 only)

If you want to receive differential corrections with the 961 and you’re using the AN150 antenna, you must use the Northstar 8410 Antenna Coupling Unit (ACU). Although similar in appearance to Northstar 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.

Mounting the 8410

The Northstar 8410 differential receiver antenna should be mounted as high as conveniently possible (but not at the highest point) and as far away as possible from other antennas. If you have several possible antenna locations, you may evaluate each by operating the unit with the DGPS antenna temporarily mounted in each location.

The best location is one providing the lowest “noise” count (atmospheric impulse noise generated by thunderstorms and other conditions, includ- ing vessel-generated noise and any on-board interference) and highest Signal-to-Noise Ratio (SNR). You can view both of these values after you turn the unit’s power on; see “Turning the unit on” beginning on page 26.

Another major concern, precipitation static (called “P-static”), must be addressed when installing the differential antenna. The 8410 receives weak AM signals and can be sensitive to nearby noise sources and P-static. P-static generally appears only during rain or snow; conse- quently, it can easily be overlooked during installation. Much like a loran antenna, the effects of P-static are minimized if the differential antenna is mounted so that it isn’t the highest metallic object on the vessel. The highest metal object acts much like a lightning rod, attracting tiny static discharges in the atmosphere. If the differential receiver antenna is the highest object, these discharges can totally override the differential sig- nals and cause poor operation in bad weather. The optimum antenna location is high and clear for fair-weather operation, but below the top of a metal mast or other antenna for best foul-weather operation. On sailing vessels, the ACU might be mounted on top of a low mast, or on the stern rail if no other suitable location is available.

The 8410 differential receiver ACU can be mounted on a standard marine antenna mount (one inch diameter, 14 threads per inch).

For special applications involving serious grounding problems, or where optimum portability is required, you can use the AN205-P combination GPS/DGPS antenna; for details, see “Installing the AN205-P antenna” beginning on page 19.

The ACU consists of two pieces, the body and the base. The circuitry is sealed in a rugged, waterproof, 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

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961 INSTALLATION MANUAL Revision A

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NorthStar Navigation 961XD installation manual Installing an 8410 ACU for use with the AN150 only, Mounting
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961X, 961XD specifications

NorthStar Navigation has long been a leader in marine navigation systems, and the NorthStar 961XD and 961X are no exceptions. These cutting-edge devices bring advanced navigation capabilities to both recreational boaters and professional mariners, ensuring precise positioning and enhanced safety on the water.

The NorthStar 961XD is equipped with a powerful GPS receiver that delivers exceptional accuracy, even in challenging environments. This is achieved through a combination of differential GPS (DGPS) technology and support for WAAS (Wide Area Augmentation System). These features enable users to achieve positioning accuracy within a few meters, which is crucial for safe navigation in crowded or complex marine environments.

One of the standout features of the NorthStar 961XD and 961X is their intuitive user interface. The devices boast a large, high-resolution color display that provides clear visibility in various lighting conditions, including bright sunlight. The menu-driven system allows users to quickly access essential functions, making it easy to plot courses, set waypoints, and track routes on the go.

Both models support advanced charting capabilities, including the ability to display vector and raster charts. The chart database can be easily updated via USB, ensuring that users have access to the latest navigational information. This is particularly important for long-distance cruisers navigating through unfamiliar waters.

Another significant feature of the NorthStar 961XD and 961X is their integrated fishfinder capabilities. With sonar technology, users can locate fish, understand the underwater topography, and enhance their fishing experience. This dual functionality makes the devices versatile companions for both navigation and hunting for the next big catch.

Connectivity is another important aspect of the NorthStar systems. Both models feature multiple connectivity options, including NMEA 0183, allowing seamless integration with other onboard electronics such as autopilots, radars, and AIS systems. This enhances the overall situational awareness and safety of the vessel.

Finally, the rugged design of the NorthStar 961XD and 961X ensures they can withstand the harshest marine environments. With water-resistant housing and durable construction, these devices are built to last, providing reliable performance year after year.

In summary, the NorthStar 961XD and 961X deliver a winning combination of advanced navigation technologies, user-friendly interfaces, integrated fishfinding capabilities, and robust construction. These features make them indispensable tools for anyone serious about safe and efficient navigation on the water.