Name: Garmin G3X Touch
Brand: Garmin
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190-01115-01 G3X/G3X Touch Installation Manual - GTR 20 Installation

Rev. AC Page 21-6

21.5.2 Interference of GPS

On some installations, VHF COM transceivers, Emergency Locator Transmitter (ELT) antennas, and

Direction Finder (DF) receiver antennas can re-radiate to the GPS antenna. Placement of the GPS antenna

relative to a COM transceiver and COM antenna (including the GTR/ COM antenna), ELT antenna, and

DF receiver antenna is critical.

Use the following guidelines, in addition to others in this document, when locating the GTR 20 and its

antenna.

• Locate the GTR 20 as far as possible from all GPS antennas.

• Locate the COM antenna as far as possible from all GPS antennas.

If a COM is found to be radiating, the following can be done:

• Replace or clean VHF COM rack connector to ensure good coax ground.

• Place a grounding brace between the GTR 20 and ground.

• Shield the GTR 20 wiring harness.

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