Digital Clearance Recorder With Playback Capability; Reversionary Mode; Interface To Cockpit Voice Recorder; Figure 4-8 Playback - Garmin G1000 Reference Manual

SECTION 4 – AUDIO PANEL
Digital Clearance Recorder with Playback
Capability
The GMA 1347 provides a digital clearance recorder
with playback capability of up to 2.5 minutes of COM sig-
nal recording. Recorded COM signals are stored in sepa-
rate memory blocks. Signals from all of the selected COM
radios are recorded and can be played back. Anyone able
to hear the selected COM radios is able to hear the COM
signal playback.
Once the 2.5 minutes of recording time have been
reached, the recorder begins recording over the stored
memory blocks, starting from the oldest block. Powering
off the unit automatically clears all recorded blocks.
The PLAY key controls the playback function.
• Pressing PLAY once plays back the latest recorded
memory block, then returns to normal operation.
• Pressing PLAY during playback of a memory block
halts the playback of this block and plays back the
preceding recorded block. The PLAY key can be
used to backtrack through the recorded memory
blocks to reach and play back any desired block.
NOTE: Pressing the MKR/MUTE key during
playback halts playback and returns the recorder/
playback to normal operation.
72

Figure 4-8 Playback

Garmin G1000 Cockpit Reference Guide for Cessna Nav III
During playback, the PLAY annunciator light blinks
approximately once per second. If a COM input signal is
detected during playback, playback is halted and the new
COM input signal is recorded as the latest block.
NOTE: If the COM muting on receive option
is enabled, only the primary COM radio signal
reception is recorded by the digital clearance
recorder.

Reversionary Mode

The red DISPLAY BACKUP button selects the rever-
sionary mode for all displays. Reversionary mode opera-
tion displays important flight and engine information on
both the PFD and MFD, in case of display failure.
In dual audio panel configuration the DISPLAY
BACKUP button operates on the pilot side only.

Figure 4-9 Reversionary Mode key

Interface to Cockpit Voice Recorder

The GMA 1347 provides the ability to interface to a
cockpit voice recorder (CVR). The unsquelched pilot mi-
crophone input (all vocal inputs from the pilot) is com-
bined with all audio heard on the pilot' s headset and cabin
speaker and is output to the pilot CVR channel. The un-
squelched copilot microphone input is combined with all
audio heard on the copilot' s headset and the cabin speaker
and is output to the copilot CVR channel.