Garmin GTN 650 Pilot's Guide - Page 159

8.4 CDI (GTN 650 only) Foreword The GTN 650's CDI key is used to couple the GPS or VLOC receiver to Getting the external CDI (or HSI). CDI selection is available on the Default Navigation Started page. When the external CDI (or HSI) is connected to the GPS receiver, "GPS" is Xpdr Ctrl shown on the annunciation bar. When the external CDI (or HSI) is being driven by the VLOC receiver, "VLOC" appears instead. Com/Nav NOTE: The external CDI (or HSI) must be coupled to the VLOC receiver for FPL approaches which are not approved for GPS. See the ILS example in the Procedures section for more information. Direct-To NOTE: GPS phase of flight annunciations (LPV, ENR, etc.) are not applicable to the external CDI (or HSI) when VLOC is active. Proc Wpt Info NOTE: The internal on-screen CDI information is based on GPS data and cannot be used for primary navigation. Map NOTE: If the unit is not configured for a CDI key, then the "activate GPS missed approach" will only resume automatic waypoint sequencing. The user must Traffic switch to GPS navigation, if desired, by using their external source selection method (this is typical an EFIS system). Terrain 1. The navigation source is shown in the center of the annunciation Weather bar at the lower part of the display. Nearest CDI Display Music Touch CDI Key To Toggle Navigation Source Touch To Edit FPL Touch To Access Map Page GPS Level Navigation Touch OBS Of Service Source Key To Toggle Annunciation OBS Mode Figure 8-38 Navigation Source Selection 2. Touch the CDI key to toggle between sources. Utilities System Messages Symbols Appendix Index 190-01004-03 Rev. B Garmin GTN 625/635/650 Pilot's Guide 8-29