190-00726-00 Rev. J Garmin G900X Pilot’s Guide 149AUDIO PANEL AND CNSSYSTEMOVERVIEW FLIGHTINSTRUMENTS EIS AUDIO PANEL& CNS FLIGHTMANAGEMENT HAZARDAVOIDANCE AFCS ADDITIONALFEATURES APPENDICES INDEXFREQUENCY SPACINGThe G900X COM radios can tune either 25-kHz spacing (118.000 to 136.975 MHz) or 8.33-kHz spacing(118.000 to 136.990 MHz) for 760-channel or 3040-channel configuration. When 8.33-kHz channel spacingis selected, all of the 25-kHz channel spacing frequencies are also available in the complete 3040-channel list.COM channel spacing is set on the System Setup Page of the AUX Page Group.Figure 4-18 COM Channel Spacing25-kHz ChannelSpacing8.33-kHz ChannelSpacingChanging COM frequency channel spacing:1) Select the AUX – System Setup Page.2) Press the FMS Knob to activate the flashing cursor.3) Turn the large FMS Knob to highlight the Channel Spacing Field in the COM Configuration Box.4) Turn the small FMS Knob to select the desired channel spacing.5) Press the ENT Key to complete the channel spacing selection.While the COM CONFIG Window is selected, the G900X softkeys are blank.Figure 4-19 AUX – System Setup PageSelect 8.33-kHzor 25.0-kHzCOM FrequencyChannel Spacing