1-19190-00601-02 Rev. B Garmin G600 Pilot’s GuideForewordSec 1SystemSec 2PFDSec 3MFDSec 4HazardAvoidanceSec 5AdditionalFeaturesSec 6Annun.& AlertsSec 7SymbolsSec 8Glossary Appendix AAppendix BIndex1.3.4 Display BacklightingThe backlighting of the PFD and MFD displays and bezel keys can beadjusted automatically or manually. The default setting (automatic backlightingadjustment) uses photocell technology to automatically adjust for ambientlighting conditions. Photocell calibration curves are pre-configured to optimizedisplay appearance through a broad range of cockpit lighting conditions. Manualbacklighting adjustment can be accomplished using the existing instrumentpanel dimmer bus or the following procedures.Backlighting Adjustment1) From the first AUX page, press the small MFD knob to highlight the “DisplayBrightness” “Mode” box.2) Turn the small MFD knob to select the desired brightness Level and then pressENTER.Figure 1-18 Display Brightness Adjustment3) Turn the large MFD knob to highlight the mode field. Turn the small MFD knobto select “AUTO” or “MANUAL.”4) Press ENT.1.3.5 Dual GDU 620 InstallationsDual GDU 620 units when connected in the aircraft may be set up tocommunicate and share information by “Crossfilling” or synchronizinginformation between the two units.1.3.5.1 Crossfill InformationThe following information is always synchronized between both GDU 620’s:• Selected Altitude• Selected Heading• Selected Course
