NorthStar Navigation 800/628-4487, 978/897-6600 installation manual Installing the AN205-P antenna

SECTION FOUR: Installing and wiring the 2701

Installing the AN205-P antenna

Choosing the best antenna mounting location

The 2701 operates with Northstar’s AN205-P “combo” GPS/DGPS antenna. For mounting recommendations, see see “Choosing the best mounting location” beginning on page 12.

NOTE:

Before permanently installing the AN205-P, try temporarily installing it and using the 958 to see if the antenna location works well.

CAUTION!

Don’t mount the antenna near rotating warning beacons or strobe lights, electric motors, fluorescent lights, or other RF sources. These can create RF interference to the differential reception.

If position data is intermittent, make sure you have the proper cable length, and check the quality of the antenna location and the quality and proper termination of the connectors. Also, make sure that the 2701’s ground lug terminal is securely connected with a heavy gauge conductor to ship’s ground.

Use the locking nut shown to prevent rotation of the antenna or bottoming out of the mounting stanchion into the threaded mount portion of the antenna. If done with enough force, either of these may break the antenna.

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Figure 13: Northstar AN205-P antenna dimensions

Connecting the 2701 to the antenna

The 50-foot antenna cable connects the 2701 with the AN205-P antenna. The cable length must be a maximum of 50 feet, but can be shortened to the desired length. Don’t make any tight bends in the cable, and fasten it along its length to avoid chafing or whipping or any kind. Coil up any unused length of cable. Be sure that the cable connectors are securely fastened. NOTE: Installations that require a cable length from 50 to 100 feet should order the AN206 combo antenna and a 100-foot length of coaxial cable from the Northstar Sales Department.

958 Installation Manual, Rev. A1 Page 19