190-00726-00 Rev. AGarmin G900X Pilot’s Guide4-16AUDIO PANEL AND CNSNAV radios are selected for listening by pressing the corresponding keys on the Audio Panel. Pressing theNAV1 or NAV2 Key selects and deselects the navigation radio source. Selected audio can be heard over the headsetand the speakers (if selected). Radios can be selected individually or simultaneously.Figure 4-18 Selecting a NAV Radio ReceiverNAV RECEIVER MANUAL TUNINGThe NAV frequency controls and frequency boxes are on the left side of the PFD and MFD.Manually tuning a NAV frequency:1) Turn the NAV Knob to tune the desired frequency in the NAV Tuning Box.2) Press the Frequency Transfer Key to transfer the frequency to the NAV Active Frequency Field.3) Adjust the volume level with the NAV VOL/ID Knob.4) Press the NAV VOL/ID Knob to turn the Morse code identifier audio on and off.Figure 4-19 NAV Frequency TuningPress theFrequency Transfer Key toTransfer NAV Frequencies BetweenActive and Standby Frequency FieldsTurn theNAV Knob toTune the Frequency inthe Tuning BoxTurnVOL/ID Knob to adjustvolume. Press Knob to TurnMorse Code On or Off.