Garmin GNC 420AW Installation Manual - page 111
400W Series Installation Manual
Page 5-31
190-00356-02
Rev. E
5.5.6.2.1 One 400W Series Unit / One SN3308
1.
Cycle power to the GNS 400W Series unit and acknowledge the prompts until it gets to the self
test page (see Section 5.5.1).
2.
Ensure that the SN3308 is receiving valid heading.
NOTE
The Vertical Deviation Indication will not be displayed unless the SN3308 is receiving
valid heading.
3.
While the GNS 400W Series unit is displaying the self test page, verify that the SN3308 is
displaying the following data from the GPS source.
•
Course Deviation: Half-scale left deviation, TO indication, flag pulled
•
Vertical Deviation: Half-scale up deviation, flag pulled
•
Active Waypoint: GARMN
4.
On the GNS 400W Series unit verify that an OBS value is displayed (and not dashed out).
5.
Acknowledge the self test on the GNS 400W series unit by pressing the ENT key.
6.
Select VLOC on the GNS 400W Series unit and verify that the SN3308 displays NAV 1 or NAV
2 (depending on what navigation source the GNS 400W is).
7.
Using a VOR test set verify that the CDI deviation on the SN3308 is displayed correctly.