Installation Manual

Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Installation Checkout Page 3-44
3.11.1.3.1 GPS Operation Check
1. Press the Status button to open the GPS Status screen.
2. Verify that GPS information is being displayed and that the "GPS" operating mode is "WAAS". If
the information is missing perform the following:
• The unit may not be able to establish communication with a satellite due to an obstruction of the
GPS reception. Either move the aircraft to an area with better GPS reception or use a GPS
Simulator to generate the necessary signal.
• If the GPS reception continues to be a problem, check the GPS antenna installation.
3. Verify that the GPS position agrees with a known reference point.
4. Verify that the signal bars are showing at least 40 -50% in the GPS Receiver Information Packet for
all the GPS/SBAS satellites in view.
5. Power ON other avionics and verify that the signal bars are showing at least 40 -50% in the GPS
Receiver Information Packet for the satellites do not degrade significantly and position remains steady.
6. Power ON VHF Com radios (if applicable also power ON the SATCOM System). Verify that the
signal bars are showing at least 40 -50% in the GPS Receiver Information Packet for the satellites do
not degrade significantly and position remains steady.
7. If the aircraft is TAS/TCAS equipped, turn on the TAS/TCAS system and verify that the signal bars
are showing at least 40 -50% in the GPS Receiver Information Packet for the satellites do not
degrade significantly and position remains steady.
8. Any GPS interference (significant degrade in signal strength) must be resolved prior to completing
the installation. Use the troubleshooting procedures in the maintenance section for help.
3.11.1.3.2 Initial Traffic Altitude Mode
1. Press the Settings button.
2. Verify that unrestricted traffic Altitude Mode annunciator is green. Change the setting if needed by
pressing the indicator near the unrestricted text to select. Note - This is how the pilot selects the
default traffic altitude filter mode.
3.11.1.3.3 Set Display Brightness
1. Press the BRT button located on the right side of the screen to open the brightness scale bar.
2. Press and slide the scale button to adjust the Display Brightness Trim to the desired percentage.
3. The brightness screen times out after a few moments returning to the settings screen.
NOTE
This dimming setting only affects the NGT-9000 display brightness.
Optional lamps (if installed) required external dimming control.
3.11.1.4 TAWS Operational Check
Use the following procedure to check the operation of the panel mount NGT-9000. (This check is not
required for the remote mount unit). The Terrain Awareness and Warning System (TAWS) is optional
requiring a Function Activation code to be entered via the MPC (MAT).
1. After power is applied to Lynx NGT-9000, wait 3-5 minutes to let the GPS to initialize.
2. Slide each screen (right side) application until the TAWS application is shown. Verify that the screen
is showing terrain and obstacles information of local area.