How to Install a Garmin GNC 300XL
The Garmin GNC 300XL is a global positioning system meant for use by pilots in aircraft. It provides them with navigational data and has communication capability. The device has a 760 channel transceiver and an 80 by 240 pixel high resolution dual scan display. It's Technical Standard Orders (TSO) certified by the FAA for nonprecision approaches in the Instrument Flight Rules (IFR) environment. Its features include auto squelch control, instant standby and emergency channel select and frequency transfer from the GPS database.
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Instructions
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1
Check that all parts and information are available in your Garmin package. This includes the GNC 300XL Unit and NavData card, GPS antenna, installation rack and connectors, Pilot's Guide, Quick Reference Guide, Database Subscription packet and Warrant Registration card.
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2
Insert a 3/32" Allen wrench in the small hole adjacent to the dual knob.
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Rotate the wrench counterclockwise until it stops to ensure the pawl latch is in the proper position.
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Insert the GNC 300XL into the aviation rack and rotate the wrench clockwise to secure the unit. Press gently on the left side of the unit while tightening to make sure the connectors fit together properly.
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Tips & Warnings
The Garmin GNC 300XL uses and can radiate radio frequency energy. If it's not installed correctly you may find it interfering with radio communications. To correct this try moving your device. You can also try connecting it to a different circuit than the equipment that it's affecting.
Read through the Owner's Manual thoroughly before using your GPS device. Practice using the simulator mode to familiarize yourself with the procedure.
You can check for discrepancies in your Garmin device's measurements by comparing the information it gives you to other navigational aids in your aircraft.
The vertical measurements shown by your GPS device may significantly vary from the altitude shown on pressure altimeters in your aircraft. Do not use GPS altitude for vertical navigation.
Unauthorized repairs will void the warranty on your device and your authority to use it under Part 15 regulations. Contact a Garmin Service Center to have any repairs or modifications made.
All GPS devices rely on the accuracy and maintenance of the Global Positioning System which is operated by the United States Government. Changes in this system could affect the performance of this device.
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