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190-01878-05  Rev. A

Garmin GMA 345 3-COM Pilot’s Guide

20

GMA 345 3-COM Audio Panel

3D AUDIO

3D Audio is useful when multiple audio sources are present.  By using 

different responses in each ear, 3D audio processing creates the illusion that 
each audio source is coming from a unique location or seat position.

Because this feature uses different signals for left and right channels, it 

requires wiring for stereo intercom and stereo headsets.  If 3D audio is 
activated when mono headsets are in use, the listener will still hear all audio 
sources; however, there is no benefit from location separation.

With a single COM selected and 3D Audio enabled, the listener hears 

the audio source at the 12 o’clock position.  If all three COMs are selected, 
the listener hears the audio sources at the 11, 12 and 1 o’clock positions 
with the COM numbers increasing clockwise.  If two COMs are selected, 
the listener hears the audio sources at the 11 and 1 o’clock positions with 
the COM numbers increasing clockwise.  All other intercom positions are 
processed to sound like their relative seat location.  By default, the GMA 
345 3-COM assumes the pilot sits in the left seat.  A Garmin authorized 
service center can make changes to the default configuration.

Summary of Contents for GMA 345 3-COM

Page 1: ...GMA 345 3 COM pilot s guide...

Page 2: ...eproduced copied transmitted disseminated downloaded or stored in any storage medium for any purpose without the express written permission of Garmin Garmin hereby grants permission to download a sing...

Page 3: ...that has been modified or altered without the written permission of Garmin In addition Garmin reserves the right to refuse warranty claims against products or services that are obtained and or used i...

Page 4: ...al retailer is required Garmin will not replace missing components from any package purchased through an online auction International purchases A separate warranty may be provided by international dis...

Page 5: ...er must not be co located or operating in conjunction with any other antenna or transmitter except in accordance with FCC multi transmitter product procedures IC Contains IC 5123A BGTWT32I NOTE This d...

Page 6: ...roduct the Software in binary executable form in the normal operation of the Garmin Product Title ownership rights and intellectual property rights in and to the Software remain with Garmin and or its...

Page 7: ...Part Number Change Summary 190 01878 05 Initial release Rev Date Description A February 2018 Production Release...

Page 8: ...tem ICS 17 Pilot Isolate Mode 17 Crew Isolate Mode 18 Intercom Volume 18 Radio Mute Music 18 ICS Mute Music 18 Passenger Muting 19 Speaker 19 Passenger Address Mode PA Mode 19 Split PA Mode 19 3D Audi...

Page 9: ...ASQ processing further reduces the amount of background noise Intercom squelch threshold adjustments are handled automatically by the system Pushbutton keys control audio selection When a key is selec...

Page 10: ...eadset 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 If a monaural headset is used at one of the...

Page 11: ...ckwise clockwise position Left seat crew member ICS volume increases decreases Left seat crew member Music Volume Turn Left Outer Knob right left to increase decrease volume Minimum maximum volume is...

Page 12: ...uthorized service center can make changes to the default configuration SPLIT COM MODE NOTE Split COM performance is affected by the distance between the COM antennas and the separation of the tuned fr...

Page 13: ...io selected for transmission The aural message Monitor Mute Enabled Disabled is heard Function Action Key Annunciations COM Selection Toggle between COM enabled and COM disabled the audio from the cur...

Page 14: ...r numbered COM and the copilot transmits on the higher numbered COM independently Simultaneously press COM1 MIC and COM2 MIC keys Simultaneously press COM1 MIC and COM3 MIC keys Simultaneously press C...

Page 15: ...electing a NAV Radio Receiver AUXILIARY INPUTS The GMA 345 3 COM has 3 AUX inputs A single AUX Key selects all three AUX inputs to be simultaneously heard Selecting Auxiliary Inputs MARKER BEACON RECE...

Page 16: ...hree states of marker beacon operation On Muted and Deselected The MKR MUTE key annunciator indicates when marker beacon audio is selected Marker beacon audio is not heard when the annunciator is off...

Page 17: ...rols NOTE The PILOT and CREW ICS ISOLATION states are exclusive Both cannot be active at the same time When neither Pilot or Crew are active the unit is in All ICS mode In this mode the pilot copilot...

Page 18: ...d outer knobs control audio levels for the right seat crew member headset Passenger volumes are shared with the side configured for copilot operation The inner smaller knobs on both sides are used to...

Page 19: ...ts and warnings autopilot traffic altitude are always heard on the speaker even when the speaker is not selected Speaker Key Passenger Address Mode PA Mode Press and hold the SPKR Key for one second t...

Page 20: ...ill hear all audio sources however there is no benefit from location separation With a single COM selected and 3D Audio enabled the listener hears the audio source at the 12 o clock position If all th...

Page 21: ...Mono headset in use 1 Use a stereo headset 2 Stereo headset in use with mono stereo switch set to mono 2 Set mono stereo switch on headset to stereo 3 Aircraft wiring has left audio wired to both lef...

Page 22: ...r the position of the boom MIC usually attached on left side If the headset is backwards the left right position information will be swapped 2 Incorrect aircraft wiring left right channels swapped 2 S...

Page 23: ...stored memory blocks starting from the oldest block Pressing the PLAY Key once plays the latest recorded memory block Pressing the MKR MUTE Key during play of a memory block stops play If a COM signal...

Page 24: ...ic volume Refer to the following table on SEL Key Functions for more information Press the TEL Key to enable Bluetooth telephone or rear connector wired telephone connection to ICS When a Bluetooth te...

Page 25: ...ng incoming call TEL flashing TEL displays solid blue Bluetooth Phone Call Disconnected By Source Lost connection or user action or TEL returns to previous state green or OFF Disconnect Bluetooth Phon...

Page 26: ...disabled by the user however it is always muted during alerts Enabling Disabling Muting Press and hold the NAV1 Key for 1 second to toggle radio muting of music on and off The aural message Radio Mut...

Page 27: ...ice is connected Pairing mode allows a new device to discover and create a connection to the GMA 345 3 COM Additionally pairing mode is used to forcefully disconnect a device currently connected to th...

Page 28: ...eiving audio via the Bluetooth Hands Free Profile NOTE The third party camera must initiate the initial pairing process with the GMA 345 3 COM Press and hold the TEL PAIR Key for one second to put the...

Page 29: ...A 345 3 COM is powercycled Bluetooth Media Controls With a Bluetooth device connected music enabled and the Bluetooth Music Source selected Press the SPKR and NAV1 Keys simultaneously to PLAY PAUSE Bl...

Page 30: ...rcumstances where the aircraft power falls below 11 volts the USB power jack will turn off When the GMA is turned off the USB power port is also off The USB power jack supports a maximum of 2 1 Amps c...

Page 31: ...OM Audio Panel FAIL SAFE OPERATION If there is a failure of the GMA 345 3 COM or when power is not applied a fail safe circuit connects the pilot s headset and microphone directly to the COM1 transcei...

Page 32: ...ess keys simultaneously Intercom Mute Music Press and hold for 1 second BT Call Volume Increase Press and hold 3D Audio Press and hold for 1 second BT Call Volume Decrease Press and hold Passenger Add...

Page 33: ......

Page 34: ...rty House Hounsdown Business Park Southampton Hampshire SO40 9LR U K Garmin Corporation No 68 Zhangshu 2nd Road Xizhi District New Taipei City Taiwan Contact Garmin Product Support at www flygarmin co...

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