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Garmin G1000 Cockpit Reference Guide for the Mooney M20M, M20R, & M20TN
5-2
SECTION 5 – AUDIO PANEL
5.1 COM RADIO SELECTION
Pressing the COM1 MIC or COM2 MIC Key selects
the active transmitter (i.e., microphone). The associated
receiver audio (COM1 or COM2) also becomes selected
when the COM MIC key is pressed.
To prevent deselecting the desired received audio
when pressing another COM MIC key, press the already
selected COM1 or COM2 Key before pressing the other
COM MIC key.
Figure 5-2 Transceivers
5.2 SPLIT COM FUNCTION
NOTE: Split COM performance is affected by
the distance between the antennas and the
separation of the tuned frequencies.
Figure 5-3 Split COM Function
Pressing the COM 1/2 Key selects and deselects the split
COM function. During split COM operation, the COM1,
COM1 MIC, COM2, and COM2 MIC keys are active.
When the COM 1/2 Key is selected, COM1 is used by
the pilot for transmission and COM2 is used by the copilot.
The COM1 MIC annunciator blinks when the pilot’s
microphone is keyed and the COM2 MIC annunciator
blinks when the copilot’s microphone is keyed.
In this mode, both the pilot and the copilot can transmit
simultaneously over separate radios. The pilot can still
monitor NAV1, NAV2, and MKR audio as selected, but
the copilot is only able to monitor COM2.
5.3 MARKER BEACON RECEIVER
The marker beacon receiver is always ON. Only the
marker beacon audio can be turned off. Figure 5-4 shows
the marker beacon annunciators on the PFD
Figure 5-4 Marker Beacon Signal Indicator Lights on the PFD
Inner Marker
Annunciator
Outer Marker
Annunciator
Middle Marker
Annunciator
When the MKR/MUTE Key is pressed, the key
annunciator is lit and the audio tone can be heard over
the speaker or headsets during marker beacon reception.
When the tone is active, pressing the
MKR/MUTE
Key once mutes the audio but does not affect the marker
annunciator. The audio returns when the next marker
signal is received.
To turn off the marker beacon audio, press the
MKR/
MUTE Key once when there is no marker indication
present, or press twice when an indication is present. The
key annunciator will be extinguished when the marker
beacon audio is turned off.