190-00592-02 Rev. AGarmin G1000 Pilot’s Guide for the Diamond DA40/40F4-8AUDIO PANEL AND CNSCOM TRANSCEIVER MANUAL TUNINGThe COM frequency controls and frequency boxes are on the right side of the PFD and MFD.Manually Tuning a COM Frequency:1) Turn the COM Knob to tune the desired frequency in the COM Tuning Box.2) Press the Frequency Transfer Key to transfer the frequency to the active field.3) Adjust the volume level with the COM VOL/SQ Knob.4) Press the COM VOL/SQ Knob to turn automatic squelch on and off.Figure 4-6 COM Frequency TuningCOMVOL/SQ Knob Pressing theFrequencyTransfer Key Transfers COMFrequencies Between Activeand Standby Frequency BoxesTurn theCOM Knob toTune the Frequency inthe Tuning BoxSELECTING THE RADIO TO BE TUNEDPressing the small COM Knob transfers the frequency tuning box and the Frequency Transfer Arrowbetween the upper and lower radio frequency fields.Figure 4-7 Switching COM Tuning BoxesPressing theCOM Knob Switchesthe Tuning Box From One COMRadio to the OtherCOM TUNING FAILUREIn case of a COM system tuning failure, the emergency frequency (121.500 MHz) is automatically tuned inthe radio in which the tuning failure occurred.Figure 4-8 COM Tuning FailureEmergency ChannelLoaded Automatically
