Garmin GDL 82, Руководство по установке

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System Checkout
190-01810-00 GDL 82 TSO Installation Manual
Rev. 5 Page 8-2
8.1 Ground Checks
Configure the GDL 82 before performing system checkouts. When configured correctly, the GDL 82 annunciates
failures detected with interfacing systems. Correct annunciated failures before proceeding with the ground checks.
Failures are displayed on the Faults page of the GDL 8X Install Tool. All ground checks are done through the
GDL 8X Install Tool.
8.1.1 GPS
NOTE
After installation, the initial position acquisition can take up to 20 minutes. Subsequent acquisitions will
not take as long.
Internal GPS Source
The GPS checkouts described in this section are applicable for installations utilizing the GDL 82 internal GPS/SBAS
receiver as a position source. To ensure the GDL 82 is able to compute a GPS position, all other avionics should be
turned off at the start of this test, with the GDL 82 powered on. To verify, go to the GPS page.
Use the GDL 8X Install Tool to ensure that a 3D Fix or 3D Diff Fix is obtained. If the unit is unable to acquire satellites,
move the aircraft away from obstructions that might shade GPS reception. If the GPS solution does not improve, check
the GPS antenna installation.
Once GPS position information is available, move aircraft to a known reference position and perform the following
steps:
1. On the GPS page, verify that the LAT/LON agree with the known reference position.
2. While monitoring the GPS page, turn on other avionics one at a time and check Navigation Status, and ensure
that a 3D Fix or 3D Diff Fix is obtained or retained.
3. Before proceeding with the interference check, verify that any connected equipment is transmitting and/or
receiving data from the GDL 82 and is functioning properly.
4. If you are testing a transmitter from a non-aviation device, each frequency must be verified by transmitting for at
least 30 seconds on each channel.
5. Check for VHF COM transmitter interference as follows:
6. Select 121.150 MHz on the COM transceiver to be tested.
a. Transmit for a period of 35 seconds.
b. While transmitting, check Navigation Status and verify that a 3D Fix or 3D Diff Fix is retained.
7. Repeat step 6 for the following frequencies:
a. 25 kHz COM Channel Spacing:
121.150 MHz 131.225 MHz
121.175 MHz 131.250 MHz
121.200 MHz 131.275 MHz
121.225 MHz 131.300 MHz
121.250 MHz 131.325 MHz
131.200 MHz 131.350 MHz