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TRANSMIT/RECEIVE INDICATIONS
During COM transmission, a white TX appears by the active COM frequency replacing the Frequency
Transfer Arrow. On the Audio Panel, when the active COM is transmitting, the active transceiver COM MIC
Key Annunciator flashes approximately once per second.
During COM signal reception, a white RX appears by the active COM frequency replacing the Frequency
Transfer Arrow. Entertainment audio, if selected, is muted during active COM radio reception. Refer to
Additional Audio Panel Functions later in this section, and details on the Data Link Receiver in the Additional
Features Section.
COM TRANSCEIVER MANUAL TUNING
The COM frequency controls and frequency boxes are on the right side of the MFD and PFD.
Manually tuning a COM frequency:
1) Turn the COM Knob to tune the desired frequency in the COM Tuning Box (large knob for MHz; small knob for
kHz).
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.
190-00592-06 Rev. A
Transmit and
Receive Indicators
Figure 4-4 COM Radio Transmit and Receive Indications
Turn the VOL/SQ Knob to adjust
volume. Press the Knob to Turn
Automatic Squelch On or Off
Figure 4-5 COM Frequency Tuning
Garmin G1000 Pilot's Guide for the Diamond DA40/40F
AUDIO PANEL AND CNS
Annunciator
Flashes During
Transmission
Press the Frequency Transfer
Key to Transfer COM
Frequencies Between Active
and Standby Frequency Boxes
Turn the COM Knob to
Tune the Frequency in
the Tuning Box
97
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