air
avionics
4. Installation Overview
2. Do not coil the antenna cable.
3. Do not paint or cover the antenna.
4. Ensure that no conductive parts (metal, carbon fiber) are located above of the
antenna. Conductive, grounded parts below of the antenna may improve GPS
antenna performance.
5. Install the antenna in a location where it has a clear view of the sky and the largest
unobstructed possible opening angle.
6. Do not install the antenna closer than 30 cm (1 ft) away from another active GPS
antenna.
Figure 4.9.: GPS antenna reception angle
4.5 Pressure Tubing Considerations
Pressure tubing should be installed in accordance with applicable regulations.
•
Route the tubing as appropriate. Avoid sharp bends.
•
Make sure the aircraft static pressure port is plumbed directly to the unit static
pressure input port.
•
Secure all tubes in order to minimize vibration.
•
Ensure that no deformations of the airframe surface have been made that would
affect the relationship between static air pressure and true ambient static air pressure
for any flight condition.
•
The pressure tubing should not be located near flight control cables and controls.
•
AT-1 should not be at the low point of the static plumbing lines in order to avoid
moisture or debris collecting at or near the unit.
•
Use care to avoid getting fluids or particles into the pneumatic port.
AT-1
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Installation Manual
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rev. 4.0
·
2020/01/09
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