Vor Rmi/Obi Interface Check (Gtn 650 Only); Dme Interface Check (Gtn 650 Only); Magnetic Compass Check - Garmin GTN 625 Installation Manual

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6.12.7.1 SiriusXM Satellite Radio Weather Checkout Procedure
1. With the GTN running in the normal mode, go to the External LRUs page (in the System page
group) then touch the 'More Info' key next to the GDL69.
2. Verify that the Data Radio ID field has a valid ID. For a GDL 69A, the Audio Radio ID field
should also display a valid ID.
3. Verify that at least one subscribed weather product turns green on the GDL 69 status page. This
may take several minutes. This will indicate that the weather products are being received.
During SiriusXM activation, "Detecting Activation" will be displayed in the SERVICE CLASS field on
the XM Information page, and "Aviator" or "Aviator Pro" will be displayed once the SiriusXM signal is
detected.
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6.12.7.2 SiriusXM Satellite Radio Audio Checkout Procedure
1. With the GTN running in the normal mode, access the Music page from the Services page.
NOTE
If the SiriusXM Satellite Radio audio subscription has not been activated, audio is
available only on Channel 1. If the audio subscription has been activated, audio should be
available on multiple channels.
2. Ensure that the GDL 69A audio is not muted.
3. Verify that audio can be heard over the headsets. Adjustment of the volume may be required.
6.12.8

VOR RMI/OBI Interface Check (GTN 650 Only)

The GTN RMI/OBI output can be used to drive an RMI (or OBI) navigation indicator. This check verifies
that the RMI/OBI is receiving data from the GTN. If the following steps do not perform correctly, check
the electrical connections and configuration setup.
NOTE
The aircraft heading system must be operating properly in order for the RMI needle to
point correctly.
1. Apply power to the GTN.
2. If installed, set the RMI select switch to the VLOC position.
3. Tune a local VOR station, or use a simulated signal from an approved VOR Test System.
4. Verify that the RMI needle swings and points toward the VOR station.
6.12.9

DME Interface Check (GTN 650 Only)

If the GTN is set up to remotely channel a DME, verify the interface as described in this section.
1. Select a VOR/ILS channel that corresponds to (1) a DME station within a 40 nautical mile range,
or (2) the frequency of a DME ground tester.
2. Verify that the DME locks on to the signal and a valid distance, ground speed and time are dis-
played.
3. Tune an invalid VOR station. Verify that the DME changes to an invalid station.

6.12.10 Magnetic Compass Check

A Compass swing should be carried out at completion of installation in accordance with AC 43.13-1B,
chapter 12, section 3, paragraph 12-37.
GTN 625/635/650 TSO Installation Manual
Page 6-66
190-01004-02
Rev. F