User Guide

190-00494-00 Rev. B
Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang
4-7
AUDIO PANEL AND CNS
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.
Figure 4-4 COM Radio Transmit Indications
Annunciator
Flashes During
Transmission
Transmit
Indication
When the same COM radio is selected on both Audio Panels, the pilot has transmit priority on COM1, the
copilot has transmit priority on COM2.
STUCK MICROPHONE
If the push-to-talk (PTT) Key becomes stuck, the COM transmitter stops transmitting after 35 seconds of
continuous operation. An alert appears on the PFD to advise the crew of a stuck microphone.
The COM1 MIC or COM2 MIC Key Annunciator on the Audio Panel flashes as long as the PTT Key remains
stuck.
Figure 4-5 Stuck Microphone Alert