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10. View the SUMMARY field and ensure that all items are 'complete', then de-activate the cursor.
11. Go to the System Status page.
12. Activate the cursor and highlight 'GDL69' in the LRU window.
13. Verify that the reported part number and version of the software matches the data in the Required
Equipment List.
14. Continue to the GDL 69A Test procedure.
4.3 Configure RS-232 Port
For installations with the MX20, refer to the MX20 Installation Manual for configuring the correct RS-
232 port of the MX20 that the GDL 69/69A is connected. For installations with the 400/500 series units,
refer to the 400/500 Series Pilot's Guide Addendum for configuring the correct RS-232 port of the
400/500 series unit that the GDL 69/69A is connected.
4.4 System Operational Checkout
Before performing system checkout, ensure that the configuration module (if applicable) is properly
programmed and the GDL 69/69A connected to the correct communication port.
Display/Control device refers to either the MX20 or the 400/500 series units.
4.4.1 Data Link Status and Connection
Power up the GDL 69/69A. View the data link status on the display/control device to verify XM signals
are being received. Refer to the MX20 installation manual or the 400/500 Series Pilot's Guide Addendum
for instructions on how to access the data link status page on those units. For GDU 104x units, refer to the
G1000 Configuration Manual, 190-00303-04 or the aircraft specific configuration manual.
The antenna gain setting should be 25 for the GA 55, GA 55A and GA 57, and may be different for
equivalent antennas. The cable loss setting should be set to 4.5 dB at the factory. Set this setting to the
value computed in Section 2.6.4.1 if it is different from the default value.
Figure 4-1. Data Link Configuration Page on the MX20
GDL 69/69A Installation Manual
190-00355-02
System Configuration/Checkout
Revision E
Page 4-3
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