NorthStar Navigation 961XD Troubleshooting the GPS/DGPS antenna installation, Interference

Models: 961X 961XD

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SECTION TWO - Installation

Table 2: Troubleshooting the installation (continued)

 

 

 

Problem Area

Symptom

Possible Solutions/Reasons

 

 

 

 

 

 

INTERFERENCE

Electrical, magnetic, or radio frequency (RF)

Turn off power to each and all of the

 

energy is interfering with the reliable opera-

vessel’s other instruments and sys-

 

tion of the unit as shown by high levels of

tems, one at a time, to isolate the

 

noise on the DGPS status screen.

source of the interference.

 

 

Attempt to eliminate the noise through

 

 

earth grounding or RF filtering tech-

 

 

niques as appropriate to the type of

 

 

noise encountered.

 

 

 

GPS

The head and processor power up, but poor

Check that you have the proper

 

GPS SNR readings are obtained even after

length of cable and that all connec-

 

running the unit for several minutes.

tions are clean and secure.

 

 

Verify the quality of the antenna loca-

 

 

tion (the antenna should have a clear

 

 

view of the sky). For the correct

 

 

antenna placement, see Figure 5.

 

 

See Table 3, “Troubleshooting the

 

 

GPS/DGPS antenna installation,” on

 

 

page 39.

 

 

 

Troubleshooting the GPS/DGPS antenna installation

In the following table (troubleshooting the GPS/DGPS antenna installa- tion), the Northstar AN150 refers to the 12-dB GPS antenna, the North- star 8410 coupler with whip antenna refers to the beacon receiver whip-type (E-field) antenna, and the Northstar AN205-P refers to the combination (combo) GPS/DGPS loop antenna with splitter. Whenever possible, the best and most efficient way to troubleshoot is to use a known-good set of cables, a splitter for combo antennas (when applica- ble), and working antennas as spares for swapping.

NOTE:

Concerns for the AN205-P that aren’t explained in the GPS/ DGPS antenna troubleshooting table below include the fact that mounting a loop-type antenna in close proximity to a radome (radar-set antenna) can cause signal degradation or a complete loss of the beacon signal. The klystron or magnetron contained in the radar antenna produces a very dense mag- netic field whether or not the radar set is turned on. These magnetic field effects are also present during the operation of the servo motors located on gyro-stabilized TV or IMARSAT communications dish platforms. Signal degradation checks should be performed before finalizing the installation.

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961 INSTALLATION MANUAL Revision A

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NorthStar Navigation 961XD installation manual Troubleshooting the GPS/DGPS antenna installation, Interference

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.