Garmin | GMA™ 345 | Garmin GMA™ 345 GMA 345 3-COM Pilot's Guide

Garmin GMA™ 345 GMA 345 3-COM Pilot's Guide
GMA 345 3-COM
pilot’s guide
Copyright © 2018 Garmin Ltd. or its subsidiaries. All rights reserved.
This manual reflects the operation of GMA 345 3-COM 3-COM units. Some differences
in operation may be observed when comparing the information in this manual to
earlier or later Mod status levels.
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February, 2018
190-01878-05 Rev. A
Printed in the U.S.A.
AVIATION LIMITED WARRANTY
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or workmanship for the earlier of: 2 years or 800 flight hours from the date of
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CAUTION: Incorrect aircraft wiring could short the left channel or
both channels to ground if a monaural headset is plugged into
the stereo jacks. If wired incorrectly, fail-safe operation will not
work.
Transmitter Grant of Equipment Authorization
FCC
Contains FCC ID: QOQWT32I
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC RF Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. End users must follow the specific operating instructions for satisfying
RF exposure compliance. This transmitter meets both portable and mobile limits as
demonstrated in the RF Exposure Analysis. This transmitter 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 device complies with Innovation, Science and Economic Development Canada
license-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept any
interference, including interference that may cause undesired operation of the device.
Cet appareil est conforme aux normes RSS sans licence du ministére Innovation,
Sciences et Développement économique Canada. Son fonctionnement est soumis aux
deux conditions suivantes : (1) ce périphérique ne doit pas causer d’interférences et
(2) doit accepter toute interférence, y compris les interférences pouvant entraîner un
fonctionnement indésirable de l’appareil.
Anatel Warning
Este equipamento não tem direito ã proteção contra interferência prejudicial e não
pode causar interferência em sistemas devidamente autorizados.
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Hereby, Garmin declares that this product is in compliance with the Directive
2014/53/EU. The full text of the EU declaration of conformity is available at the
following internet address: www.garmin.com/compliance.
Radio frequency/protocol: Bluetooth® wireless technology 2.4 GHz @ -0.49 dBm
nominal
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Part Number
190-01878-05
Rev
Date
A February, 2018
Change Summary
Initial release
Description
Production Release
Table of Contents
Power-Up................................................................................................................................................10
Mono/Stereo Headsets............................................................................................................................10
Left/Right Knobs.....................................................................................................................................10
Transceivers............................................................................................................................................12
Split-COM Mode.........................................................................................................................12
Transmit Indications....................................................................................................................12
Enabling/Disabling Monitored COM Muting...............................................................................13
Receivers.................................................................................................................................................15
Nav Receiver...............................................................................................................................15
Auxiliary Inputs...........................................................................................................................15
Marker Beacon Receiver..............................................................................................................15
Turning Marker Beacon Audio On....................................................................................16
Muting Marker Beacon Audio..........................................................................................16
Deselecting Marker Beacon Audio...................................................................................17
Intercom System (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 Audio.................................................................................................................................................20
Enabling 3D Audio.......................................................................................................................21
Clearance Recorder and Player...............................................................................................................23
Entertainment Inputs..............................................................................................................................24
Music Effects...............................................................................................................................26
Entertainment Muting.................................................................................................................26
Enabling/Disabling Muting..............................................................................................26
Bluetooth®..................................................................................................................................26
Pairing a Bluetooth Device..............................................................................................27
Pairing to a Garmin VIRB X or VIRB XE Action Camera....................................................28
Pairing To A Third-Party Camera.......................................................................................28
Disabling Bluetooth.........................................................................................................29
Bluetooth Media Controls...............................................................................................29
Bluetooth Telephone Volume Controls.............................................................................29
USB Power Jack.......................................................................................................................................30
Fail-Safe Operation.................................................................................................................................31
8
Garmin GMA 345 3-COM Pilot’s Guide
190-01878-05 Rev. A
GMA 345 3-COM Audio Panel
FEATURES AND OPERATION
The GMA 345 3-COM Audio Panel provides the traditional audio
selector functions of microphone and receiver audio selection. The Audio
Panel includes an intercom system (ICS), a marker beacon receiver, a COM
clearance recorder, USB power jack, and Bluetooth® audio. Ambient noise
from the aircraft radios is reduced by Avionics Squelch (ASQ). When no
audio is detected, 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 selected, a green
annunciator on the key is illuminated. Annunciator brightness is adjusted
automatically by photocell dimming. Key brightness is adjusted by the radio
dimming bus control. Three Aux inputs are available for additional avionics
or audio devices.
Upon installation, the unit may be configured in various ways depending
on aircraft type and the needs of the pilot.
Ambient Light Sensor
Bluetooth Annunciator
Marker Beacon Lights
USB Jack Type A
GMA 345 3-COM
190-01878-05 Rev. A
Garmin GMA 345 3-COM Pilot’s Guide
9
GMA 345 3-COM Audio Panel
NOTE: The 2-COM version of the GMA 345 (below) is described in the
GMA 345 Pilot’s Guide (Part Number: 190-01878-01).
GMA 345 (2-COM) User Interface
POWER-UP
The GMA 345 3-COM performs a self-test during power-up. During the
self-test all Audio Panel annunciator lights illuminate for approximately two
seconds. Once the self-test is completed, most of the settings are restored to
those in use before the unit was last turned off.
MONO/STEREO HEADSETS
Stereo headsets are recommended when using the GMA 345 3-COM.
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.
If a monaural headset is used at one of the passenger positions, any other
passenger using a stereo headset hears audio in the left ear only.
LEFT/RIGHT KNOBS
The Left Inner Knob powers-off the unit, and is used to control left
seat crew member ICS volume. The Left Outer Knob controls left seat
crew member music volume. The Right Inner Knob controls right seat
crew member ICS volume. The Right Outer Knob controls the right seat
crew member music volume. The seat considered the pilot position is
configurable for either left or right depending on the aircraft’s needs and is
set during installation. Passenger ICS and music volume is adjusted by the
knobs on the side associated with copilot.
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Garmin GMA 345 3-COM Pilot’s Guide
190-01878-05 Rev. A
GMA 345 3-COM Audio Panel
Left
Outer
Knob
Left
Inner
Knob
Right
Inner
Knob
Left Knob - Left Seat Crew Member
Volume Controls
Function
Power OFF
Audio Panel
Left seat crew
member ICS
Volume
Left seat crew
member Music
Volume
Right seat
crew member
ICS Volume
Right seat
crew member
Music Volume
Action
Turn Left Inner
Knob to full
counter-clockwise
position
Turn Left Inner
Knob right/left to
increase/decrease
volume
Turn Left Outer
Knob right/left to
increase/decrease
volume
Turn Right Inner
Knob right/left to
increase/decrease
volume
Turn Right Outer
Knob right/left to
increase/decrease
volume
Right
Outer
Knob
Right Knob - Right Seat Crew
Member Volume Controls
Visual/Tactile
Feedback
Aural Feedback
All backlight
and annunciator
LEDs turn off
Left Inner Knob
clicks
Minimum/maximum
volume is reached at
full counter-clockwise/
clockwise position
Minimum/maximum
volume is reached at
full counter-clockwise/
clockwise position
Minimum/maximum
volume is reached at
full counter-clockwise/
clockwise position
Minimum/maximum
volume is reached at
full counter-clockwise/
clockwise position
Left seat crew
member ICS
volume increases/
decreases
Left seat crew
member Music
volume increases/
decreases
Right seat crew
member ICS
volume increases/
decreases
Right seat crew
member Music
Volume increases/
decreases
Left/Right Knob Functions
190-01878-05 Rev. A
Garmin GMA 345 3-COM Pilot’s Guide
11
GMA 345 3-COM Audio Panel
TRANSCEIVERS
Audio from the #1, #2, or #3 COM receiver can be selected independently
by pressing the respective Key(s) (COM1, COM2, or COM3). Pressing
COM1 MIC, COM2 MIC, or COM3 MIC selects the #1, #2, or #3 transmitter
and simultaneously selects the related COM receiver (COM1, COM2, or
COM3) allowing received audio to be heard. The other COM receivers can
be added by pressing their respective keys.
By default, while transmitting on a COM channel (as selected with the
COM1 MIC, COM2 MIC, and COM3 MIC keys), both the transmitting and
receiving audio are heard on the COM channel. The GMA 345 3-COM
can be configured to instead mute receiving audio on a transmitting COM
channel. A Garmin authorized 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 frequencies. If the
selected COM frequencies are too close together, interference may be
heard during transmission on the other radio.
During Split-COM operation, both the pilot and the copilot can transmit
simultaneously over separate radios. The pilot uses the lower numbered
COM and the copilot uses the higher numbered COM.
Pressing two MIC Keys simultaneously initiates Split-COM Mode (i.e.,
COM1/COM2, COM1/COM3, or COM2/COM3). The respective COM
receive and MIC annunciators are illuminated indicating Split-COM
operation. Split-COM operation is cancelled by pressing one of the
selected MIC Keys again.
TRANSMIT INDICATIONS
During COM transmission, the active transceiver (COM1 MIC, COM2
MIC, or COM3 MIC) Key Annunciator flashes approximately once per
second.
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Garmin GMA 345 3-COM Pilot’s Guide
190-01878-05 Rev. A
GMA 345 3-COM Audio Panel
During Split-COM transmission, the lower numbered COM MIC
annunciator flashes when the pilot’s microphone PTT is pressed. The
higher numbered COM MIC annunciator flashes when the copilot’s
microphone PTT is pressed.
ENABLING/DISABLING MONITORED COM MUTING
Press and hold COM1, COM2, or COM3 to enable/disable monitored
COM muting during reception of audio from the COM radio selected for
transmission. The aural message “Monitor Mute Enabled/Disabled” is
heard.
Function
Action
COM Selection: Toggle
between COM enabled
and COM disabled (the Press the
audio from the current corresponding COM
MIC selected COM is Key.
always enabled and
cannot be disabled).
Key Annunciations
COM
Enabled
COM Disabled
MIC Enabled
MIC Disabled
Press the
MIC Selection: Selects corresponding MIC
the COM used to
Key. The last MIC
transmit during Push-to- pressed remains
Talk (PTT).
selected and
deselects all others.
Transmit Indication:
Audio is sent from the Push-to-Talk (PTT)
corresponding Crew MIC keyed.
to the selected COM. *
190-01878-05 Rev. A
Garmin GMA 345 3-COM Pilot’s Guide
MIC in-key
annunciator flashes.
13
GMA 345 3-COM Audio Panel
Function
Action
Key Annunciations
Simultaneously
press COM1 MIC
and COM2 MIC
keys.
Split-COM Modes: The
pilot transmits on the
lower numbered COM
and the copilot transmits
on the higher numbered
COM independently.
Simultaneously
press COM1 MIC
and COM3 MIC
keys.
Simultaneously
press COM2 MIC
and COM3 MIC
keys.
* The pilot has priority when transmitting in the case that both crew members attempt to transmit
on the same COM.
Transceiver Key Functions
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Garmin GMA 345 3-COM Pilot’s Guide
190-01878-05 Rev. A
GMA 345 3-COM Audio Panel
RECEIVERS
NAV RECEIVER
Pressing the NAV1 and/or NAV2 Key(s) selects/deselects the receiver audio
for the corresponding navigation radio source. The selected audio source
can be heard over the headset and the speaker (if selected). All radios can
be selected individually or simultaneously.
Selecting 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 RECEIVER
The marker beacon receiver detects any marker beacon signal within
the reception range of the aircraft.
When a marker beacon signal is detected, the lamps illuminate, and
an associated keyed-tone is heard when MKR audio is selected. Marker
beacon lamps operate independently of any audio selection and cannot
be turned off.
Marker Beacon Key & Lamps
190-01878-05 Rev. A
HI SENS Annunciator
Garmin GMA 345 3-COM Pilot’s Guide
15
GMA 345 3-COM Audio Panel
The marker beacon signal sensitivity threshold can be set to either a
regular or high sensitivity. To toggle between the two, press and hold the
MKR/MUTE Key for one second. The HI SENS annunciator illuminates
when signal sensitivity is set to high.
The receiver detects the three marker tones (outer, middle, and inner).
Audio
Frequency
400 Hz
(Outer)
1300 Hz
(Middle)
3000 Hz
(Inner)
Audio Keying
−−−−−
−−−−−

Lamp Actuated
Blue
Amber
White
The GMA 345 3-COM provides three 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 or when the annunciator is on with the
marker beacon audio muted.
Turning Marker Beacon Audio On
With the MKR/MUTE annunciator off, press the MKR/MUTE Key
to activate marker beacon audio and illuminate the MKR/MUTE
annunciator.
Muting Marker Beacon Audio
During marker beacon audio reception, press the MKR/MUTE Key
to mute the audio. The MKR/MUTE annunciator remains lit, but the
current marker tone is silenced. Audio muting deactivates automatically
and marker beacon audio is heard when the next marker beacon signal
is received.
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Garmin GMA 345 3-COM Pilot’s Guide
190-01878-05 Rev. A
GMA 345 3-COM Audio Panel
Deselecting Marker Beacon Audio
To deselect marker beacon audio, press the MKR/MUTE Key twice
during marker beacon reception or once if a marker beacon signal is
not detected.
INTERCOM SYSTEM (ICS)
The GMA 345 3-COM includes a three-position intercom system (ICS),
two MUSIC inputs, and one telephone/entertainment input for the pilot,
copilot and passengers. The intercom provides Pilot and Crew audio
isolation.
Intercom Controls
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, and
passengers communicate with each other.
NOTE: The left/right seat positions associated with ‘Pilot’ and ‘Copilot’
are configured during installation for the aircraft’s specific needs.
Pilot Isolate Mode
Pressing the PILOT ‘ICS ISOLATION’ Key isolates the pilot from all
other ICS positions (copilot and passengers). The copilot and passengers
share communication between themselves but cannot communicate
with the pilot. A solid annunciation of the in-key annunciator indicates
PILOT ICS ISOLATION is active.
190-01878-05 Rev. A
Garmin GMA 345 3-COM Pilot’s Guide
17
GMA 345 3-COM Audio Panel
Crew Isolate Mode
Pressing the CREW ‘ICS ISOLATION’ Key places the pilot and copilot
on a common ICS communication channel. The passengers are on their
own intercom channel and can communicate with each other, but
cannot communicate with the pilot and copilot. A solid annunciation
of the inkey annunciator indicates CREW ICS ISOLATION is active.
INTERCOM VOLUME
The knobs on either side of the GMA 345 3-COM control intercom and
music volume independently. The left inner and outer knobs control the
audio levels for the left seat crew member headset; the right inner and
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 control
intercom volume for the receiving headsets. The outer, larger knobs are
used to control music volume.
The left inner knob can be used to turn off the GMA 345 3-COM
audio panel, by turning fully counter-clockwise until the knob clicks. All
backlight and annunciator LEDs will turn off.
The position marks on all four knobs are not night-time visible.
RADIO MUTE MUSIC
Press and hold the NAV1 Key to enable or disable muting of music
channel 1, music channel 2 and Bluetooth music audio when radio (i.e.,
COM, NAV, or AUX) audio is active.
ICS MUTE MUSIC
Press and hold the AUX Key to enable or disable muting of music audio
when intercom audio is active.
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Garmin GMA 345 3-COM Pilot’s Guide
190-01878-05 Rev. A
GMA 345 3-COM Audio Panel
PASSENGER MUTING
Press and hold NAV2 to enable/disable passenger muting during COM
audio reception. The aural message “Passenger Mute Enabled/Disabled”
is heard.
SPEAKER
NOTE: Speaker audio turns off in circumstances where aircraft power
falls below 11 volts.
All of the radios can be heard over the cabin speaker. Pressing the SPKR
Key selects and deselects the cabin speaker. Speaker audio is muted when
the PTT is pressed. Certain aural alerts 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 to initiate Passenger
Address Mode. PA Mode is annunciated by a rapid blinking of the
SPKR annunciator. When in PA Mode the crew can use the PTT “Pushto-Talk” button to deliver announcements over the speaker and to the
passenger headsets.
Split-PA Mode
During Split-PA Mode the pilot can continue to use COM1 or COM2
for transmission while the copilot delivers PA announcements. To
initiate Split-PA Mode, first enter Split-COM Mode by pressing any two
MIC Keys simultaneously, then press and hold the SPKR Key for one
second.
190-01878-05 Rev. A
Garmin GMA 345 3-COM Pilot’s Guide
19
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.
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Garmin GMA 345 3-COM Pilot’s Guide
190-01878-05 Rev. A
GMA 345 3-COM Audio Panel
ENABLING 3D AUDIO
Press and hold the PILOT Key to toggle 3D audio processing on and off
for all headset positions. When 3D Audio is enabled, the aural message
“3D audio left” is heard in the left ear followed by “3D audio right” in the
right ear. If the aural messages are not heard in only the left and then the
right ear respectively, the cause may be aircraft wiring or headset settings.
Refer to the following table if a headset or aircraft wiring problem is
suspected.
Symptom(s)
“3D audio left”
1)
message heard in
both ears.
2)
“3D audio right”
message not
heard
3)
“3D audio left”
1)
message heard
in both ears,
2)
followed by “3D
audio right”
message heard in
both ears
3)
190-01878-05 Rev. A
3D Audio Troubleshooting
Cause(s)
Solution(s)
1) Use a stereo headset
Mono headset in
use
2) Set mono/stereo switch on headset
Stereo headset in
use with mono/
to ‘stereo’
stereo switch set to
‘mono’
3) If after checking solutions #1 and
Aircraft wiring has
left audio wired to
#2 see a service center as soon as
both left and right
possible to inspect/correct wiring.
channels of stereo
This wiring fault can cause fail-safe
headset jack
audio not to function.
1) Use a stereo headset
Mono headset in
use
2) Set mono/stereo switch on headset
Stereo headset in
use with mono/
to ‘stereo’
stereo switch set to
mono
3) If after checking solutions #1 and
Incorrect aircraft
wiring (left/right
#2 see a service center as soon as
shorted together)
possible to inspect/correct wiring.
This wiring fault can cause fail-safe
audio not to function.
Garmin GMA 345 3-COM Pilot’s Guide
21
GMA 345 3-COM Audio Panel
“3D audio right” 1)
message heard in
both ears. “3D
audio left” not
heard
1)
“3D audio left”
message heard
in right ear only
followed by “3D
audio right”
message heard in
left ear only
2)
3D Audio Troubleshooting
1) See a service center as soon as
Incorrect aircraft
wiring (right channel
possible to inspect/correct wiring.
used for mono
This wiring fault can cause fail-safe
instead of left or
audio not to function.
left/right swapped)
Stereo headset is on 1) Verify correct orientation from the
backwards
left/right indication on each side of
the headset or 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) See a service center as soon as
Incorrect aircraft
wiring (left/right
possible to inspect/correct wiring.
channels swapped)
This wiring fault can cause fail-safe
audio not to function.
1) See a service center to wire the
Aircraft wired for
mono intercom
installation for stereo headsets.
1)
“3D audio left”
message heard in
left ear only, no
audio heard in
right ear.
1) See a service center as soon as
“3D audio right” 1) Incorrect aircraft
message heard
wiring (right channel
possible to inspect/correct wiring.
in right ear only,
used for mono
This wiring fault can cause fail-safe
no audio heard in
instead of left, or
audio not to function.
left ear
left/right swapped)
3D Audio Troubleshooting
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Garmin GMA 345 3-COM Pilot’s Guide
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GMA 345 3-COM Audio Panel
CLEARANCE RECORDER AND PLAYER
The GMA 345 3-COM contains a digital clearance recorder that records
up to 60 seconds of the selected COM radio signal. Recorded COM audio
is stored in separate memory blocks. Once 60 seconds of recording time
have been reached, the recorder begins recording over the 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 is detected during play of a recorded memory block, play
is halted.
Pressing the PLAY Key while audio is playing begins playing the previously
recorded memory block. Each subsequent press of the PLAY Key selects the
previously recorded memory block.
Powering off the unit automatically clears all recorded blocks.
PLAY Key
Stops Play
Left Knob - Pilot
Volume Controls
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Marker Mute Key
Garmin GMA 345 3-COM Pilot’s Guide
23
GMA 345 3-COM Audio Panel
ENTERTAINMENT INPUTS
The GMA 345 3-COM provides four telephone/entertainment inputs:
• The SEL Key selects the music source (Music 1, Music 2, Bluetooth
Music, or Music OFF) for all positions. The pilot can choose not to hear
the selected music source by either turning down the Pilot music volume
or enabling PILOT ‘ICS ISOLATION’. The copilot and passengers
can choose not to hear the selected music source by turning down the
Copilot/Passenger music 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 telephone connection is
active the rear telephone connection is disabled. Distribution is controlled
by ICS isolation state. When the TEL Key is selected, the pilot is always
connected to the telephone interface. Other ICS positions are connected
to the telephone interface if they hear the Pilot in that ICS state.
Key Annunciations
Function Action
Change
Music
Source
Music 1 Music 2 Bluetooth
OFF
Notes
Music source
selection is
cyclic, moving
from 1 to 2 to
Bluetooth to
OFF and then
back to 1.
Press
SEL
Key.
SEL Key Functions
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Garmin GMA 345 3-COM Pilot’s Guide
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GMA 345 3-COM Audio Panel
Function
Action
Toggle TEL Audio
ON/OFF
Press the TEL
Key.
TEL in-key annunciator
toggles between green
and OFF.
Receive Bluetooth
Phone Call
Incoming
call. *
TEL flashes blue
indicating an incoming
Bluetooth phone call.
Answer Bluetooth
Phone Call
Press TEL
during
incoming call
(TEL flashing).
TEL displays solid blue.
Lost
Bluetooth Phone
Call Disconnected By connection or
Source
user action.
TEL returns to previous
state (green or OFF).
Disconnect
Bluetooth Phone
Call Using GMA 345
3-COM
Bluetooth Phone
Call Initiated by
Source/Phone
Key Annunciations
or
Press TEL.
or
Press TEL, if
TEL is not yet
selected.
TEL returns to previous
state (green or OFF).
TEL displays solid blue.
* If TEL is selected (green), pre-recorded ringer audio is played.
** If TEL is selected (green), no action is required. TEL automatically turns blue and connects.
TEL Key Functions
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GMA 345 3-COM Audio Panel
MUSIC EFFECTS
The following music effects are available:
• Music Equalizer: Press the SEL Key and the PILOT Key simultaneously
to change the selected Music Equalizer setting. Available settings
include: Disabled, Classical, Pop, or Rock.
• Music Bass Boost: Press the SEL Key and the CREW Key
simultaneously to change the selected Music Bass Boost setting.
Available settings include: Disabled, Medium, or High.
ENTERTAINMENT MUTING
Entertainment muting can be enabled or 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 Mute Music Enabled/
Disabled” is heard.
Press and hold the AUX button for one second to toggle intercom
muting of music on and off. The aural message “Intercom Mute Music
Enabled/Disabled” is heard.
BLUETOOTH®
The GMA 345 3-COM supports the following Bluetooth profiles and
functions:
• A2DP Bluetooth profile for entertainment audio input.
• HFP Bluetooth profile for connection to a telephone (alternate interface
for wired TEL function).
• Ability to deliver Bluetooth audio to a VIRB X or VIRB XE Action
Camera via HFP 1.6 “Wide Band Speech” format.
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Garmin GMA 345 3-COM Pilot’s Guide
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GMA 345 3-COM Audio Panel
• Ability to deliver Bluetooth audio to third-party cameras that are
capable of receiving audio via the Hands-Free Profile. HFP 1.6 “Wide
Band Speech” format is supported by the GMA 345 3-COM.
• AVCRP Bluetooth profile for entertainment audio media controls (Play/
Pause, Skip Forward, and Skip Previous).
During power up the GMA automatically reconnects to the last
connected device. This is annunciated by the Bluetooth annunciator
illuminating.
If the same Bluetooth device is used to play music and make a phone
call, the phone has priority and the music audio is suspended. Music
audio resumes when the phone call disconnects and the music connection
is re-established by the source device.
Pairing a Bluetooth Device
NOTE: The Bluetooth annunciation is illuminated only when a Bluetooth
device 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 the GMA 345 3-COM.
Press and hold the TEL (PAIR) Key for one second to enter pairing
mode. The Bluetooth annunciator flashes to indicate the GMA 345
3-COM is in pairing mode and “Pairing Enabled” audio is played. Once
the Bluetooth annunciator flashes, the GMA is discoverable for two
minutes, or until a device is paired or connected. While discoverable,
a Bluetooth enabled device (e.g., cellphone or tablet) can find and pair
with the GMA. Refer to the device’s instruction manual for information
on how to pair and connect to a new Bluetooth device. Once paired
and connected, the Bluetooth annunciator on the GMA stops flashing
and remains lit as long as the Bluetooth connection is active. The GMA
remembers the last 10 paired devices. When the paired devices list is
full and a new device is paired, the least recently connected device is
removed from the paired device list.
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GMA 345 3-COM Audio Panel
Pairing to a Garmin VIRB X or VIRB XE Action Camera
NOTE: The GMA 345 3-COM is capable of connecting to one Bluetooth
device at a time.
The GMA 345 3-COM supports Bluetooth wireless delivery of pilot
headphone audio to versions of the Garmin VIRB action camera that
support Bluetooth mic audio input for recording.
Pairing a Garmin VIRB to the GMA 345 3-COM works like pairing
other Bluetooth audio devices. Once connected, pilot headphone
audio will be delivered to the VIRB via Bluetooth. In a connection
to the Garmin VIRB, the GMA is the source. Therefore, selecting an
entertainment key is not required.
Pairing To A Third-Party Camera
NOTE: The third party camera must support receiving 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
GMA 345 3-COM into pairing mode. Reference the third party
camera’s manual for its pairing instructions. Once the pairing process
is complete the GMA 345 3-COM and the third party camera will
connect to each other via the Hands Free Profile. During this initial
connection, Bluetooth Recording Mode will need to be enabled on
the GMA 345 3-COM for the third party camera. To enable Bluetooth
Recording Mode momentarily press the TEL (PAIR) and PILOT
keys simultaneously. When this feature is enabled, the “Bluetooth
Recording Mode Enabled” message is played on the intercom.
Enabling Bluetooth Recording Mode only needs to be done once.
When the GMA 345 3-COM and the third party camera connect
again in the future Bluetooth Recording Modes will automatically be
enabled.
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Garmin GMA 345 3-COM Pilot’s Guide
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GMA 345 3-COM Audio Panel
Disabling Bluetooth
To aid in troubleshooting, the GMA 345 3-COM Bluetooth can be
disabled. To disable, press and hold the TEL (PAIR) Key for five
seconds. “Bluetooth Disabled” audio is played. To re-enable without
powercycling, press and hold the TEL (PAIR) Key for five seconds.
“Bluetooth Enabled” audio is played.
Note that Bluetooth will always be enabled when the GMA 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
Bluetooth media.
•
Press the SPKR and NAV2 Keys simultaneously to skip to the
previous Bluetooth media track.
•
Press the SPKR and AUX Keys simultaneously to skip to the next
Bluetooth media track.
Bluetooth Telephone Volume Controls
When a Bluetooth telephone call is active and TEL is enabled:
•
Press and hold the PILOT Key to increase the Bluetooth telephone
call volume.
•
Press and hold the CREW Key to decrease the Bluetooth telephone
call volume.
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GMA 345 3-COM Audio Panel
USB POWER JACK
The USB power jack is a dedicated charge port and uses a USB Type A
jack. The USB power jack will charge any device while the GMA is powered
on. In circumstances 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 charge
current to devices.
USB Jack Dust Cover
Note that the GMA USB dust cover can be clipped to any USB cable
plugged into the GMA. The dust cover has a clip feature that can attach to a
USB cable for temporary storage to prevent losing the cover.
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Garmin GMA 345 3-COM Pilot’s Guide
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GMA 345 3-COM 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 transceiver. Audio is not available on the speaker during Fail-safe
operation.
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31
GMA 345 3-COM Audio Panel
Monitor
Mute
Bluetooth
Media
Play/
Pause
and
Press keys simultaneously
Press and hold for 1 second
Bluetooth
Media
Skip
Previous
and
Press keys simultaneously
Press and hold for 1 second
Bluetooth
Media
Skip Next
and
Press keys simultaneously
Press and hold for 1 second
BT Call
Volume
Increase
Press and hold
Press and hold for 1 second
BT Call
Volume
Decrease
Press and hold
Press and hold for 1 second
Bluetooth
Pairing
Mode
or
or
Press and hold for 1 second
Radio
Mute
Music
Passenger
Mute
Intercom
Mute
Music
3D Audio
Passenger
Address
Split COM
Press any two keys
simultaneously
Marker
Beacon
High Sens
Press and hold for 1 second
Press and hold for 1 second
Bluetooth
Recording
Mode
and
Press keys simultaneously
Music
Equalizer
and
Press keys simultaneously
Music
Bass
Boost
and
Press keys simultaneously
Alternate Key Function Quick Reference
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Garmin GMA 345 3-COM Pilot’s Guide
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Garmin International, Inc.
1200 East 151st Street
Olathe, Kansas, 66062, U.S.A.
Garmin AT Inc.
2345 Turner Road SE
Salem, OR 97302, U.S.A.
Garmin (Europe) Ltd.
Liberty 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.com.
For warranty information refer to
https://fly.garmin.com/fly-garmin/support/warranty-information/
© 2018 Garmin Ltd. or its subsidiaries
190-01878-05 Rev. A
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