Garmin GMA 350 Installation Manual

Also see for GMA 350: Pilot's guide Pilot's guide Installation manual

Garmin GMA 350 Installation Manual Manual pdf 24 page image

190-01134-11 GMA 350/350c/350H/350Hc Installation ManualRev. J Page 2-32.3 Installation ConsiderationsThe GMA 350/350H interfaces with various avionics equipment. Fabrication of a wiring harness isrequired. Sound mechanical and electrical methods and practices are required for installation of theGMA 350/350H.2.3.1 Marker Beacon Antenna Installation2.3.1.1 Location ConsiderationsThe marker beacon antenna should be mounted on a flat surface on the underside of the aircraft body.NOTEDo not install the antenna inside the aircraft. Installing the antenna inside the aircraftlimits the antenna reception and increases the antennas susceptibility to radiation fromcomponents inside the aircraft.Mount the antenna so that there is a minimum of structure between it and the ground radio stations. Locateit as far away as possible from transmitter antennas.2.3.1.2 Marker Beacon Antenna MountingInstall the antenna according to the antenna manufacturer’s instructions. If the antenna is being installed ona composite aircraft, ground planes must sometimes be added. Conductive wire mesh, radials or thinaluminum sheets embedded in the composite material provide the proper ground plane allowing theantenna pattern (gain) to be maximized for optimum performance.2.3.1.3 Marker Beacon Antenna CableUse coaxial cable meeting the applicable aviation regulation for the marker beacon antenna. Any cablemeeting specifications is acceptable for the installation. When routing antenna cables, observe thefollowing precautions:• All cable routing should be kept as short and as direct as possible• Avoid sharp bends• Avoid routing cables near power sources (e.g., 400 Hz generators, trim motors, etc.) or near powerfor fluorescent lighting• Allow a 12 inch minimum separation between any other cables, including antenna cables (e.gADF, COM, NAV, GS, MARKER)