G1000 TM Audio Panel Pilot’s Guide for the Beechcraft A36/G36
Record of Revisions Revision Date of Revision Revision Page Range A 07/20/05 6-1 – 6-11 Description Initial release. Garmin G1000 Pilot’s Guide for the Beechcraft A36/G36 190-00573-00 Rev.
DESCRIPTION 6.1 INTRODUCTION This Pilot’s Guide describes the Garmin GMA 1347 audio panel and its operating instructions. The Garmin GMA 1347 is an audio control panel and marker beacon system. Pressing the audio panel keys controls audio selection of COM, NAV and intercom. LED annunciators indicate when a key function is selected. The audio panel includes a six-position intercom system (ICS) with electronic cabin noise de-emphasis and two stereo music inputs.
DESCRIPTION MONO/STEREO HEADSETS The audio panel can accommodate up to six (6) headsets, pilot, copilot and up to four (4) passengers. Stereo headsets are recommended for use in this aircraft. Using a monaural headset in a stereo jack shorts the right headset channel output to ground. While this does not damage the audio panel, a person listening on a monaural headset hears only the left channel in both ears.
DESCRIPTION Transmitters Transceiver Audio Disabled on A36/G36 Aircraft Not recommended for use in A36/G36 aircraft Speaker Passenger Address Marker Beacon Signal Sensitivity Marker Beacon/Mute Optional on A36/G36 aircraft Navigation Radio Audio Disabled on A36/G36 aircraft Manual Squelch Digital Recording Playback ICS Isolation VOL/SQ SQ Annunciation VOL Annunciation Reversionary Mode Control Figure 6.1.1 Front Panel Controls 190-00573-00 Rev.
OPERATION 6.2 OPERATION POWER-UP AND FAIL-SAFE OPERATION Power-up The audio panel performs a self-test during power-up. All panel annunciator lights illuminate for approximately two (2) seconds. Once the self-test is completed, the settings are restored to the ones in use before the unit was last turned off. Disabled on A36/G36 aircraft Figure 6.2.
OPERATION Transmitting SPLIT COM FUNCTION When a transmitter is keyed, the active transceiver MIC key annunciator blinks approximately once per second. A white TX indication appears next to the active COM frequency on both the PFD and the MFD during transmission. Pressing the COM 1/2 key selects the split COM function. During split COM operation, the COM1, COM1 MIC, COM2 and COM2 MIC keys are active.
OPERATION MARKER BEACON RECEIVER Description and Operation The audio panel marker beacon is used as part of the ILS system. The marker beacon receiver is always ON and receives at 75 MHz. The audio panel provides a marker audio muting capability. The receiver detects the three (3) marker tones, outer, middle and inner, and illuminates the appropriate marker beacon indicators. The marker indicators are located to the left of the Altimeter on the PFD (Figure 6.2.3).
OPERATION Beacon Outer Marker Audio Frequency 400 Hz Audio Keying ——— Middle Marker 1,300 Hz •—•— Airway/Inner Marker 3,000 Hz •••• Rate 2 dashes per second 95 dot-dash combinations per minute 6 dots per second Lamp Color Blue Amber White Table 6.2.1 Marker Beacon Signal Characteristics Inner Marker Middle Marker Outer Marker Figure 6.2.
OPERATION INTERCOM SYSTEM (ICS) ISOLATION CREW Mode The intercom system (ICS) provides four (4) isolation modes: ALL, PILOT, COPILOT and CREW. The desired mode can be selected or deselected using the PILOT and COPLT keys. The four (4) possible ICS isolation states are summarized in the table below. CREW mode is selected when both the PILOT and COPLT keys are annunciated.
OPERATION INTERCOM VOLUME AND SQUELCH CONTROL The MAN SQ key and VOL/SQ knob control the volume and squelch of the intercom. The MAN SQ key allows either automatic or manual control of the squelch setting. The VOL/SQ knob controls volume or manual squelch adjustment for the pilot and copilot/passenger. When the MAN SQ annunciator is not lit (auto-squelch is on), the VOL/SQ knob controls only the volume. When the MAN SQ annunciator is lit (manual squelch), the VOL/SQ knob controls both volume and squelch.
OPERATION The current ICS isolation mode affects the distribution of the entertainment inputs MUSIC 1 and MUSIC 2. NOTE: MUSIC 1 and MUSIC 2 cannot be completely turned off. Audio level for these inputs can be set above and below a nominal value. Contact a Garmin-authorized service center for adjustment. MUSIC 1 MUSIC 1 can be heard by the pilot in COPILOT mode and in ALL mode, and can be heard by the copilot in PILOT mode and in ALL mode.
OPERATION DIGITAL CLEARANCE RECORDER WITH PLAYBACK CAPABILITY The audio panel contains a digital clearance recorder that plays back up to 2.5 minutes of COM signal recording. Recorded COM audio is stored in separate memory blocks. Audio 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 audio playback. Once the 2.
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