ADS-B FDL-DB Dual Band Series
Installation Manual
Document No. 88552 Rev A
FFS Copyright © 2020 All rights reserved.
5-53
9. Read the primary altimeter value; rotate the
CODE
knob either clockwise or
counterclockwise until the altitude displayed on the TC978 Controller matches the
aircraft primary altimeter. Press the
ENT
button and the display will move to the high
altitude set point and an altitude will be displayed as shown below. On the static test set,
drive the altitude to the service ceiling of the aircraft.
10. Read the primary altimeter value; rotate the
CODE
knob either clockwise or
counterclockwise until the altitude displayed on the TC978 Controller matches the
aircraft primary altimeter. Press the
ENT
button and the display will move to the test
altitude screen which is the next configuration item in the setup mode.
To complete the testing you should leave the front controller screen displaying the encoder
altitude, and exercise the altitude on the static test set across the altitude range of the aircraft.
The display will be as shown above for pressure reported. Use at least 10 test points and verify
that in each case the altitude displayed on the primary altimeter and the altitude displayed on
the TC978 Controller correspond within the 125 foot tolerance. Lightly tap the altimeter at each
test point to eliminate friction effects.
5.4.3 Pressure Altitude Reported
Pressure altitude is displayed after the altitude calibration setup has been completed. The display
shows the reported pressure altitude and should match the altitude reported by the primary
altimeter.
Press
ENT
button and the display will instruct completion of setup and power off the system.
