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Manual Squelch Annunciator; Off for Automatic Squelch, On for Manual SquelchPress to switch between VOL and SQ. Turn to adjust Squelch when SQ Annunciation is lit, Volume when VOL Annunciation is lit.Volume AnnunciationSquelch AnnunciationMaster Volume Control for Pilot Side or Copilot SideICS IsolationFigure 4-47 Intercom Controls
130 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B
Audio Panel and CNS
SYSTEM
OVERVIEW
FLIGHT
AUDIO PANEL EICAS INSTRUMENTS
& CNS
FLIGHT
MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
Passenger Address (PA) Systemystem
A passenger address system is provided by pressing the PA Key to deliver messages to the passengers. The message is heard by the other pilot on the headset only if the INTR COM Key is enabled. PA messages are one way from the flight deck to the passengers.
A Push-to-talk (PTT) must be pressed to deliver PA announcements to the passengers over their headphones.
When PA is selected on the Audio Panel, the annunciator flashes about once per second while pressing the PTT, the COM MIC annunciator is no longer lit, and the active COM frequency for that Audio Panel changes to white, indicating that there is no COM selected.
Figure 4-48 PA Key Selected for Cabin AnnouncementsPA Key is Selected on the Audio Panel
Simultaneousimultaneousimultaneous COM Operationperation NOTE: If the selected COM1 and COM2 frequencies are within approximately 1 MHz of each other, interference may be heard during transmission on the other radio. Simultaneous COM operation is affected by the distance between the COM antennas and the separation of the tuned frequencies.
Both the pilot and the copilot can transmit and receive simultaneously over separate COM radios. The selected COM MIC Annunciator flashes when either pilot’s microphone PTT is pressed.
If both pilots select the same COM radio, the pilot has priority on COM1 and the copilot has priority on COM2.
190-00494-02 Rev. B Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 131
Audio Panel and CNS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS EICAS AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE AFCS ADDITIONAL
FEATURES APPENDICES INDEX
Clearance Recorder and Playerlayer
The Audio Panels contain a digital clearance recorder that records up to 2.5 minutes of the selected COM radio signal. Recorded COM audio is stored in separate memory blocks. Once 2.5 minutes of recording time have been reached, the recorder begins recording over the stored memory blocks, starting from the oldest block.
Pressing the REC Key enables recording of audio from the COM radio selected for transmission. Quiet periods between COM reception are not recorded.
The PLAY Key controls the play function. The PLAY annunciator indicates when play is in progress. The PLAY annunciator turns off after playback is finished.
Pressing the PLAY Key once plays the latest recorded memory block and then returns to normal operation. Pressing the PLAY Key again during play of a memory block stops play. If a COM input signal is detected during play of a recorded memory block, play is halted.
Pressing the PLAY Key twice within one-half second while audio is playing plays the previous block of recorded audio. Each subsequent two presses of the PLAY Key within one-half second will backtrack through the recorded memory blocks to reach and play any recorded block.
Powering off the unit automatically clears all recorded blocks.
Figure 4-49 Record and Playback Key
132 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B
Audio Panel and CNS
SYSTEM
OVERVIEW
FLIGHT
AUDIO PANEL EICAS INSTRUMENTS
& CNS
FLIGHT
MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
4.6 Audio Panels Preflight Procedure NOTE: If the flight crew is using headsets that have a high/low switch or volume control knob, verify that the switch is in the high position and the volume control on the headsets are at max volume setting. On single‑pilot flights, verify that all other headsets are not connected to avoid excess noise in the audio system. NOTE: When the MAN SQ Key is pressed, the flight crew is now able to set the ICS squelch manually. If manual squelch is set to full open (SQ annunciated and the small knob turned counterclockwise) background noise will be heard in the ICS system as well as during COM transmissions.
After powering up the G1000 system the following steps will aid the flight crew in maximizing the use of the Audio Panels as well as prevent flight crew induced issues. These preflight procedures should be performed each time a flight crew boards the aircraft to insure awareness of all audio levels in the Audio Panels and radios.
　
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