Ground-Link Installation




This guide gives you the step-by-step procedures for installing your Ground-Link system. In addition to these instructions, you will need to refer to the antenna assembly instructions included with the antenna.

This guide does not attempt to explain local building codes or FAA regulations for mounting antennae or running cabling. Please refer to the appropriate authorities to ensure that your installation conforms to all codes.

Getting Started

Ground-Link Transceiver

Installation of the Ground-Link system is a straightforward process, but before you get started, make sure you have all the equipment you will need. You should have all of the following:

  • Ground-Link transceiver
  • Antenna kit (2 packages)
  • Coaxial Cable
  • Telephone Cable

If you are missing any of the above components recheck the packaging and call us at (612) 377-6976 with any further questions.

Step 1.
Place the Ground-Link Unit

Position your Ground-Link in a location where it is out of the way and won't be tampered with. The unit may rest on a horizontal surface, or be mounted on a wall. If mounting on a wall, be sure the mounting can support the transceiver's 16 pound weight. When positioning the Ground-Link, make sure the cooling vents are not obstructed. The location should also be near an electrical and telephone outlet.

Step 2.
Assemble the Antenna

Figure 2 - Ground-Link antenna
mounting detail

Your Ground-Link system comes with an antenna kit that must be assembled before use. Follow the assembly instructions provided with the antenna. You will need the allen wrench (supplied) to perform the assembly. Note: If circumstances permit, a flexible rubber antenna may be connected directly to the Ground-Link unit, eliminating the need for the coaxial cable and exterior antenna. Call Avtech Marketing for more information.

Step 3.
Mount the Antenna

The Ground-Link antenna must be mounted at a height between 7 and 10 feet. Do not mount the antenna higher than specified, or the unit may not comply with FAA regulations. To mount the antenna, use the supplied clamps and attach it to a pole or antenna mast. When mounting the antenna, make sure that the center whip is pointing upward, and the other four are horizontal. Be sure your mounting location is near enough to the Ground-Link transceiver so the supplied coaxial cable can be used.

Step 4.
Run the Coaxial Cable

You will need to run the coaxial cable from the location of your Ground-Link transceiver to the antenna. Ensure that it does not lie across the open ground, where it could be damaged or cause someone to trip. Provide a drip loop in the cable where it exits your building, to prevent moisture from entering.

Step 5.
Connect Cables

Figure 3 - Rear view of transceiver,
showing connections

  1. Plug the Ground-Link's power cord into an electrical outlet. When choosing an outlet, it is recommended you avoid an outlet on the same circuit as refrigerators, heaters, copiers, or other devices that can cause power sags or surges.
  2. Look through the hole on the front of the Ground-Link. A red LED will be visible if the unit has power.
  3. Connect the phone cable to the Ground-Link and plug the other end into a telephone wall jack. It is recommended, but not required, that you use a dedicated phone line for your Ground-Link.
  4. Connect the antenna's coaxial cable to the connector on the Ground-Link transceiver.

Step 6.
Basic Reception Test

Perform this test with the telephone cable disconnected.
  1. With the Ground-Link unit powered on, key a handheld radio (or have someone key an aircraft radio) four times on 121.725 MHz (or whatever the unit's operating frequency is). The Ground-Link should attempt to dial.
  2. If you hear dialing, the unit is receiving radio signals correctly. If not, check the antenna cabling and position. Repeat the test until you hear the Ground-Link attempting to dial.
  3. Reconnect the telephone cable. Now that you have the unit correctly installed, re-connect the phone cable and perform the next step, the final reception test.

Step 7.
Comprehensive Reception Test

Perform this test with the all cables connected.
  1. Take a vehicle with a radio capable of tuning the Ground-Link to the extents of the aircraft movement area.
  2. At each point farthest away from the Ground-Link, key the microphone four times on the Ground-Link frequency. The system should dial the air traffic control facility. Explain to them that you are performing a test and let them know how many times they can expect a call from you during the test.
  3. If the unit fails to establish communications at any point on the movement area, you may have to reposition the Ground-Link antenna to compensate for the reception problem.

At this point, your Ground-Link unit is fully tested and operational. Please call us at (612) 377-6976 with any questions or comments and enjoy your new Ground-Link service!