Garmin GTN 750 XM Satellite Radio Activation Instructions - Page 26
If you have a GDL 69A/69AH, Verify Audio
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3. If the GDL69 VER field displays "---" then GDL 69 Series to GNS 430W/530W interface communications are not yet established. Check the GDL 69 Series power, RS-232 configuration, and/or wiring. 4. Verify DATA ID contains the eight character identification code. 5. Verify DATA SIGNAL quality is either "Weak" or "Strong". If signal quality is "Antenna" or "None‟, check the antenna and wiring. 6. If you have a GDL 69A/69AH, Verify Audio ID contains the eight character identification code. Then verify that AUDIO SIGNAL quality is either "Weak" or "Strong". If signal quality is "Antenna" or "None‟, check the antenna and wiring. 7. SERVICE CLASS will initially read "DETECTING ACTIVATION". After the your activation request is completely processed by the XM activation system the service class field should change to the class that corresponds to the service level that you requested. This value will either be Aviation LT or Aviator. For a list of weather products available for the service level you requested, see Page 20 GDL 69/69A XM Satellite Radio Activation Procedures 190-00355-04 Rev. J