Garmin GDU 37X Installation Manual page 68

2. Verify that the GPS receiver is functional and able to calculate its present position.
Test the XM Receiver (if applicable):
1. Power on unit and use the FMS Joystick to select the XM Page.
2. Verify that the XM receiver is functioning correctly as indicated by the green signal strength bars.
See Section 4.6
190-01054-01
Rev. D
for XM Activation Instructions if needed.
GDU 37X Installation Manual
Page 5-2