Garmin | GMA™ 350 | Garmin GMA™ 350 GMA 350H/350Hc Pilot's Guide

Garmin GMA™ 350 GMA 350H/350Hc Pilot's Guide
GMA 350H/350Hc
Pilot’s Guide
Copyright © 2011-2013, 2015-2017 Garmin Ltd. or its subsidiaries. All rights reserved.
This manual reflects the operation of GMA 350H/350Hc Audio Panels. Some
differences in operation may be observed when comparing the information in this
manual to some installations as configuration changes can be made by the installer.
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October, 2017
190-01134-14 Rev. L
Printed in the U.S.A.
AVIATION LIMITED WARRANTY
All Garmin avionics products are warranted to be free from defects in materials
or workmanship for the earlier of: 2 years or 800 flight hours from the date of
purchase for new TSO remote-mount and TSO panel-mount products; 1 year or
400 flight hours from the date of purchase for new Non-TSO remote-mount* and
Non-TSO panel-mount*, portable products and any purchased newly-overhauled
products; 6 months or 200 flight hours for factory repaired or newly-overhauled
products exchanged through a Garmin Authorized Service Center. Within the
applicable period, Garmin will, at its sole option, repair or replace any components
that fail in normal use. Such repairs or replacement will be made at no charge to
the customer for parts or labor, provided that the customer shall be responsible
for any transportation cost. This Limited Warranty does not apply to: (i) cosmetic
damage, such as scratches, nicks and dents; (ii) consumable parts, such as batteries,
unless product damage has occurred due to a defect in materials or workmanship;
(iii) damage caused by accident, abuse, misuse, water, flood, fire, or other acts of
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who is not an authorized service provider of Garmin; or (v) damage to a product
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 in contravention of the laws of any country.
This Limited Warranty also does not apply to, and Garmin is not responsible for,
any degradation in the performance of any Garmin navigation product resulting
from its use in proximity to any handset or other device that utilizes a terrestrial
broadband network operating on frequencies that are close to the frequencies used
by any Global Navigation Satellite System (GNSS) such as the Global Positioning
Service (GPS). Use of such devices may impair reception of GNSS signals.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE WARRANTIES
AND REMEDIES CONTAINED IN THIS LIMITED WARRANTY ARE EXCLUSIVE AND
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IN DURATION TO THE DURATION OF THIS LIMITED WARRANTY. SOME STATES DO
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THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT
OR CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE
OR INABILITY TO USE THE PRODUCT OR FROM DEFECTS IN THE PRODUCT. SOME
STATES DO NOT ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL
DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.
Garmin retains the exclusive right to repair or replace (with a new or newlyoverhauled replacement product) the product or software or offer a full refund of
the purchase price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND
EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.
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for warranty verification. To obtain warranty service, an original or copy of the
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components from any package purchased through an online auction.
International purchases: A separate warranty may be provided by international
distributors for devices purchased outside the U.S., depending on the country. If
applicable, this warranty is provided by the local in-country distributor and this
distributor provides local service for your device. Distributor warranties are only
valid in the area of intended distribution. Devices purchased in the U.S. or Canada
must be returned to the Garmin service center in the U.K., the U.S., Canada or
Taiwan for service.
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 ID: IPH-0163700
IC: 1792A-0163700
IC M/N: GMN-00871
NOTE
This device complies with Part 15 of the FCC rules. Operation is subject to the
following conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference which
may cause undesired operation
NOTE
This device does not contain any user-serviceable parts. Repairs should only be
made by an authorized Garmin service center. Unauthorized repairs or modifications
could result in permanent damage to the equipment, and void your warranty and
your authority to operate this device under Part 15 regulations.
Industry Canada Statement
This device complies with Industry 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 d’Industrie Canada. Son
fonctionnement est soumis aux conditions suivantes: (1) cet appareil ne doit
pas causer d’interférences et (2) doit accepter toute interférence,y compris les
interférences pouvant entraîner un fonctionnement indésirable de l’appareil.
Under Industry Canada regulations, this radio transmitter may only operate using
an antenna of a type and maximum (or lesser) gain approved for the transmitter by
Industry Canada. To reduce potential radio interference to other users, the antenna
type and its gain should be so chosen that the equivalent isotropically radiated
power (e.i.r.p.) is not more than that necessary for successful communication.
Conformément à la réglementation d’Industrie Canada, le présent émetteur
radio peut fonctionner avec une antenne d’un type et d’un gain maximal (ou
inférieur) approuvé pour l’émetteur par Industrie Canada. Dans le but de réduire
les risques de brouillage radioélectrique à l’intention des autres utilisateurs, il faut
choisir le type d’antenne et son gain de sorte que la puissance isotrope rayonnée
équivalente (p.i.r.e.) ne dépasse pas l’intensité nécessaire à l’établissement d’une
communication satisfaisante.
FCC Statement for Mobility Device
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with
minimum distance 20cm between the radiator and your body. This transmitter
must not be co-located or operating in conjunction with any other antenna or
transmitter.
Declaration of Conformity
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.
Anatel Warning
Este equipamento opera em caráter secundário, isto é, não tem direito a proteção
contra interferência prejudicial, mesmo de estações do mesmo tipo, e não pode
causar interferência a sistemas operando em caráter primário.
Table of Contents
Controls................................................................................................................. 8
Features and Operation..................................................................................... 12
Power-UP............................................................................................................ 13
Mono/Stereo Headsets...................................................................................... 13
Transceivers........................................................................................................ 13
Enabling/Disabling Monitored COM Muting............................................................14
Split-COM Mode....................................................................................................14
Transmit Indications...............................................................................................15
Receivers............................................................................................................. 15
Marker Beacon Receiver.........................................................................................16
Intercom System (ICS)....................................................................................... 17
Copilot Configured as Crew or Passenger...............................................................18
Intercom MODES....................................................................................................19
Intercom Volume and Squelch.................................................................................23
Speaker..................................................................................................................26
3D Audio.............................................................................................................. 27
Enabling 3D Audio.................................................................................................27
3D Audio Troubleshooting......................................................................................28
Clearance Recorder and Player......................................................................... 30
Voice Recognition.............................................................................................. 31
Entertainment Inputs........................................................................................ 37
Telephone and Entertainment Muting.....................................................................37
Bluetooth® (GMA 350Hc Only)........................................................................... 38
Pairing a Bluetooth Device with the GMA 350Hc....................................................38
Assigning an Audio Source to the Bluetooth Device.................................................38
Additional Bluetooth Control Functions..................................................................39
Connecting Bluetooth to a Garmin VIRB.................................................................39
Bluetooth® Recording Mode...................................................................................40
Fail-safe Operation............................................................................................ 40
Garmin GMA 350H/350Hc Pilot’s Guide
GMA 350H/350Hc Audio Panel
CONTROLS
1
11
2
3
4
5
6
7
8
9
12
13
14
15
16
17
18
19
10
20
21
GMA 350H Controls
22
23
GMA 350H (Traffic) Controls
24
25
GMA 350Hc (Bluetooth®) Controls
8
Garmin GMA 350H/350Hc Pilot’s Guide
26
27
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GMA 350H/350Hc Audio Panel
NOTE: When a key is selected, a triangular annunciator above the key is
illuminated.
1
MKR/MUTE – Selects marker beacon receiver audio. Mutes the
currently received marker beacon receiver audio. Deactivates
automatically and marker beacon audio is heard when the next marker
beacon signal is received. Also, stops play of recorded COM audio.
2
COM1 – When selected, audio from the #1 COM receiver can be
heard. Press and hold to enable/disable monitored COM muting
during primary COM reception.
3
COM2 – When selected, audio from the #2 COM receiver can be
heard. Press and hold to enable/disable monitored COM muting
during primary COM reception.
4
COM3 – When selected, audio from the #3 COM receiver can be
heard. Press and hold to enable/disable monitored COM muting
during primary COM reception.
5
NAV1 – When selected, audio from the #1 NAV receiver can be heard.
6
AUX – When selected, audio from the AUX inputs can be heard.
7
– Selects and deselects audio from a telephone or entertainment
device connected to the Front Panel Jack. Audio from a telephone
device connected to the rear of the audio panel is used if a device is not
connected to the Front Panel Jack. Press and hold to enable/disable
muting during reception.
8
MUSIC – Selects and deselects music entertainment audio. Press and
hold to enable/disable MUSIC muting during reception.
9
MAN SQ – Manual Squelch annunciator. When lit, squelch is
controlled manually.
10
Volume Indicator – Indicates volume/squelch setting relative to full
scale.
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9
GMA 350H/350Hc Audio Panel
10
11
Front Panel Jack – Used for an entertainment or telephone input.
12
MIC1 – Selects the #1 transmitter for transmitting. COM1 receive
is simultaneously selected when this key is pressed allowing received
audio from the #1 COM receiver to be heard. COM2 or COM3 receive
can be added by pressing the COM2 or COM3 Key. Selection of a
second MIC button initiates Split-COM mode (using COM1/COM2 or
COM1/COM3). When in Split-COM mode, the pilot is using the lower
numbered COM, the copilot is using the higher numbered COM.
13
MIC2 – Selects the #2 transmitter for transmitting. COM2 receive
is simultaneously selected when this key is pressed allowing received
audio from the #2 COM receiver to be heard. COM1 or COM3 receive
can be added by pressing the COM1 or COM3 Key. Selection of a
second MIC button initiates Split-COM mode (using COM1/COM2 or
COM2/COM3). When in Split-COM mode, the pilot is using the lower
numbered COM, the copilot is using the higher numbered COM.
14
MIC3 – Selects the #3 transmitter for transmitting. COM3 receive
is simultaneously selected when this key is pressed allowing received
audio from the #3 COM receiver to be heard. COM1 or COM2 receive
can be added by pressing the COM1 or COM2 Key. Selection of a
second MIC button initiates Split-COM mode (using COM1/COM3 or
COM2/COM3). When in Split-COM mode, the pilot is using the lower
numbered COM, the copilot is using the higher numbered COM.
15
NAV2 – When selected, audio from the #2 NAV receiver can be heard.
16
PILOT – Controls the pilot intercom system. Press and hold to toggle
3D audio on/off for all headset positions.
17
COPLT – Controls the copilot intercom system. Press and hold to
toggle copilot configuration between crew and passenger.
18
PASS – Controls the passenger intercom system. Press and hold to
enable/disable passenger muting during reception.
Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
19
SPKR – Selects and deselects the cabin speaker. COM, NAV, AUX, and
MKR receiver audio can be heard on the speaker. Press and hold for 2
seconds for Passenger Address (PA). The SPKR key flashes during PA.
20
Cursor (CRSR) Control Knob – Turn to move the cursor (flashing
green or blue annunciator) to the desired source.
21
Volume (VOL) Control Knob – Turn the smaller knob to control
volume or squelch of the selected source (indicated by the flashing
green or blue annunciator). When the volume control cursor is not
active press to switch to Blue-Select mode. If the volume control cursor
is active, press twice (once to cancel the cursor, twice to activate BlueSelect mode).
22
NAV – (GMA 350 H Traffic only) When selected, audio from the NAV
receiver can be heard.
23
TRFC – (GMA 350 H Traffic only) When selected, audio from the
traffic audio source can be heard. This is usually the TIS Traffic audio
(other traffic alerts maybe heard on other alert inputs regardless of the
state of this audio selection). TRFC audio is enabled by default on
each power cycle.
24
Bluetooth® Connection Annunciator – (GMA 350 Hc only) A flashing
blue annunciator indicates the unit is discoverable. A solid blue
annunciator indicates an active Bluetooth connection.
25
 Key Annunciator – (GMA 350 Hc only) Assigns the Bluetooth
device to the  audio source. Press the  key until the annunciator
turns blue. The key annunciator will cycle from OFF to GREEN to
BLUE. GREEN selects the wired audio source and BLUE selects the
Bluetooth audio source. NOTE: The Bluetooth audio can only be
assigned to one source at a time. Once the Bluetooth audio is assigned
to an audio source, the remaining entertainment audio sources will
only cycle between OFF and GREEN.
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
26
MUS Key Annunciator – (GMA 350 Hc only) Assigns the Bluetooth
device to the MUS audio source. Press the MUS key until the
annunciator turns blue. The key annunciator will cycle from OFF to
GREEN to BLUE. GREEN selects the wired audio source and BLUE
selects the Bluetooth audio source. NOTE: The Bluetooth audio can
only be assigned to one source at a time. Once the Bluetooth audio
is assigned to an audio source, the remaining entertainment audio
sources will only cycle between OFF and GREEN.
27
Control Knob Press and Hold – (GMA 350 Hc only) Press and hold
for two seconds to enable the GMA 350Hc as discoverable for pairing.
The Bluetooth Annunciator with flash to indicate that the unit is
discoverable. The unit will remain discoverable for 90 seconds or until
a successful pair is established. Once a successful pair is established,
the audio “Bluetooth paired” is played.
FEATURES AND OPERATION
The GMA 350H/350Hc 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, and a
COM clearance recorder. 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. The MAN SQ Key toggles
between manual and automatic intercom system (ICS) squelch. In automatic
ICS squelch mode, threshold adjustments are handled automatically by the
system. In manual ICS squelch mode, individual threshold adjustments can
be made for the pilot, copilot, and passenger microphones by the crew. The
ability to adjust individual thresholds for each ICS position further reduces
the amount of background noise from the radios.
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
Pushbutton keys control audio selection. When a key is selected, a triangular
annunciator above 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. During installation, the unit may be configured in various
ways depending on aircraft type and the needs of the pilot.
POWER-UP
The GMA 350H/350Hc 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. For the GMA 350H/350Hc
Traffic unit, the TRFC audio is automatically enabled when the unit is
powered-up, regardless of its state prior to the power cycle.
MONO/STEREO HEADSETS
Stereo headsets are recommended when using the GMA 350H/350Hc.
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.
TRANSCEIVERS
NOTE: Transceiver functions may also be accessed via Voice Recognition
commands. Refer to the Voice Recognition section for more information.
Audio from the #1, #2, or #3 COM receiver can be selected independently by
pressing the respective Key(s) (COM1, COM2, or COM3).
Pressing MIC1, MIC2, or MIC3 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 remaining COM receivers can be added
by pressing their respective keys. During reception of audio from the COM radio
selected for transmission, audio from the other COM radio(s) are muted.
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
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.
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.
Pressing more than one MIC Keys simultaneously initiates Split-COM
Mode (i.e., COM1/COM2, COM1/COM3, or COM2/COM3). The
respective COM1/MIC1, COM2/MIC2, or COM3/MIC3 annunciators
are illuminated indicating Split-COM operation. Split-COM operation is
cancelled by pressing one of the selected MIC Keys again.
When in Split-COM mode, the pilot is using the lower numbered COM,
and the copilot is using the higher numbered COM.
COM2 Radio is Selected
Selecting a COM Radio for Transmit
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
TRANSMIT INDICATIONS
During COM transmission, the active transceiver (MIC1, MIC2, or
MIC3) Key Annunciator flashes approximately once per second.
During Split-COM transmission, the MIC1 or MIC2 annunciator
flashes when the pilot’s microphone PTT is pressed. The MIC2 or MIC3
annunciator flashes when the copilot’s microphone PTT is pressed.
Annunciator
Flashes During
Transmission
COM Radio Transmit Indication
RECEIVERS
NOTE: Receiver functions may also be accessed via Voice Recognition
commands. Refer to the Voice Recognition section for more information.
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
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
MARKER BEACON RECEIVER
The marker beacon receiver detects any marker beacon signal within
the reception range of the aircraft.
The GMA 350H/350Hc has the ability to drive optional external
marker lamps. Marker beacon lamps operate independently of any audio
selection and cannot be turned off.
The marker beacon signal sensitivity threshold can be set to High, Low,
or User Selectable (toggle switch required).
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
(optional)
Blue
Amber
White
The GMA 350H/350Hc 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
enable marker beacon audio.
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
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.
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.
Marker Beacon Key
INTERCOM SYSTEM (ICS)
NOTE: Intercom functions may also be accessed via Voice Recognition
commands. Refer to the Voice Recognition section for more information.
The GMA 350H/350Hc includes a six-position intercom system (ICS), one
MUSIC input, and one telephone/entertainment input for the pilot, copilot
and passengers. The intercom provides Pilot, Copilot, and Passenger audio
isolation.
Intercom Controls
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
Press the PILOT, COPLT, and/or PASS Keys to distribute as required.
If the annunciators are lit, those positions will share intercom audio. If an
annunciator is NOT lit that position is isolated from the others.
COPILOT CONFIGURED AS CREW OR PASSENGER
NOTE: When the copilot position is configured as a passenger, the COPLT
Key is disabled and the copilot headset is treated as a ‘passenger’ for
intercom and entertainment audio distribution.
The copilot position can be configured as crew (COPLT Key enabled)
or as a passenger (COPLT Key disabled). Pressing and holding the
COPLT Key toggles the copilot position configuration between passenger
and crew. The aural message “Copilot as Passenger” or “Copilot as
Crew” is heard.
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
INTERCOM MODES
NOTE: In the following modes the copilot position is configured as crew.
NOTE: In the default ICS configuration, only the pilot and copilot
positions can hear aircraft alerts.
All Intercom Mode
In ‘All Intercom’ mode the Pilot, Copilot, and Passengers hear each
other and hear the aircraft audio.
Aircraft Audio
PILOT
COPLT
PASS
ICS Keys
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Mode Operation
Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
Pilot Isolate Mode
In ‘Pilot Isolate’ mode the Pilot, Copilot, and Passengers hear the
aircraft audio. The Copilot and Passengers also hear each other.
Aircraft Audio
PILOT
COPLT
PASS
ICS Keys
Mode Operation
Passenger/Crew Isolate Mode
In ‘Passenger/Crew Isolate’ mode the Pilot and Copilot hear the
aircraft audio and each other. The Passengers hear each other.
Aircraft Audio
PILOT
ICS Keys
20
COPLT
PASS
Mode Operation
Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
Copilot Isolate Mode
In ‘Copilot Isolate’ mode the Pilot and Passengers hear the aircraft
audio and each other. The Copilot has the option to use Split-COM
mode.
Split-COM Mode
(Optional)
Aircraft Audio
COPLT
PILOT
PASS
ICS Keys
Mode Operation
All Isolate Mode
In ‘All Isolate’ mode the Pilot hears the aircraft audio. The Copilot
has the option to use Split-COM mode. The Passengers hear each other.
Split-COM
Aircraft Audio (Optional)
PILOT
ICS Keys
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COPLT
PASS
Mode Operation
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GMA 350H/350Hc Audio Panel
Pilot & Copilot Isolate Mode
In ‘Pilot & Copilot Isolate’ mode the Pilot and Passengers hear the
aircraft audio. The Copilot has the option to use Split-COM mode.
Aircraft Audio
PILOT
ICS Keys
PASS
Split-COM
(Optional)
COPLT
Mode Operation
Pilot & Passenger Isolate Mode
In ‘Pilot & Passenger Isolate’ mode the Pilot and Copilot hear the
aircraft audio. The Passengers hear each other.
Aircraft Audio
PILOT
ICS Keys
22
COPLT
PASS
Mode Operation
Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
Copilot & Passenger Isolate Mode
In ‘Copilot & Passenger Isolate’ mode the Pilot can hear the aircraft
audio. The Copilot has the option to use Split-COM mode. The
Passengers hear each other.
Split-COM
Aircraft Audio (Optional)
PILOT
ICS Keys
COPLT
PASS
Mode Operation
INTERCOM VOLUME AND SQUELCH
The VOL/CRSR Knob controls selection and volume or manual squelch
adjustment for audio sources that may not be adjustable anywhere else in
the system. The small knob controls the volume or squelch. Turning the
large knob activates and/or moves the cursor (flashing green annunciator/
or flashing blue annunciator in Blue-Select Mode) to select the audio
source to adjust. The cursor will time-out after a few seconds and the
position of the cursor will always default back to the PILOT Key. Pressing
the small knob cancels the cursor.
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GMA 350H/350Hc Audio Panel
Blue-Select Mode (Telephone/Entertainment Distribution)
The music (MUSIC) and telephone/entertainment (
) audio
are distributed using the Blue-Select Mode. The following example
indicates that the pilot, copilot, and passengers will all hear the
telephone/entertainment audio.
Blue-Select Mode (Telephone/Entertainment Distribution)
The Blue-Select Mode is entered by pressing the small knob when the
volume control cursor (flashing green annunciator) is not active. If the
volume control cursor is active, press the small knob twice. The first
press will cancel the volume control cursor, the second will activate
Blue-Select Mode.
The annunciator over the
Key will be flashing blue. Any
combination of the annunciators over the PILOT, COPLT, and
PASS buttons may be blue. Select the desired button to turn the blue
annunciator on or off to distribute the telephone audio to selected crew/
passenger positions. Turn the large knob to select MUSIC, and select
the crew positions to receive the music audio.
Selecting any key other than PILOT, COPLT, PASS, MUSIC, or
will cancel Blue-Select Mode. Pressing the small knob will also
cancel Blue-Select Mode. After approximately 20 seconds with no
input, the Blue-Select Mode will automatically cancel.
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GMA 350H/350Hc Audio Panel
Adjusting Intercom Volume
When the cursor is on PILOT, COPLT, or PASS, the Volume Control
Knob adjusts the intercom volume for the listener.
Adjusting Manual Squelch
When the cursor is on MAN SQ, the Volume Control Knob adjusts
the ICS Squelch Threshold (the volume level that must be exceeded to
be heard over the intercom).
Adjusting Speaker Volume
When the cursor is on SPKR, the Volume Control Knob adjusts the
speaker volume of the selected sources (COM, NAV, AUX, MKR).
Adjusting MKR, AUX,
, and MUSIC Volume
When the cursor is on MKR, AUX,
, or MUSIC, the Volume
Control Knob adjusts the individual volume of the selected source.
Manual Squelch Annunciator; Off for
Automatic Squelch, On for Manual Squelch
Relative Volume/
Squelch Scale
Volume or Manual Squelch
Cursor
Volume/Squelch Control
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GMA 350H/350Hc Audio Panel
SPEAKER
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 2 seconds 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, to the
passenger headsets, or both depending on configuration.
Split-PA Mode
During Split-PA Mode the pilot can continue to use the radio(s) while
the copilot delivers PA announcements. To initiate Split-PA Mode,
first enter Split-COM Mode by pressing more that one MIC Keys
simultaneously, then press and hold the SPKR Key for 2 seconds.
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GMA 350H/350Hc 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 COM1 at the 11 o’clock position and COM2 at the 1 o’clock
position. All other intercom positions are processed to sound like their
relative seat location. By default, the GMA 350H/350Hc assumes the pilot
sits in the right seat. A Garmin authorized service center can make changes
to the default configuration.
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.
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27
GMA 350H/350Hc Audio Panel
3D AUDIO TROUBLESHOOTING
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.
3D Audio Troubleshooting
Cause(s)
Solution(s)
1) Mono headset in use 1) Use a stereo headset
Symptom(s)
“3D audio
left” message
heard in both 2) Stereo headset in use
ears.
with mono/stereo
switch set to ‘mono’
“3D audio
right” message 3) Aircraft wiring has
not heard
left audio wired to
both left and right
channels of stereo
headset jack
“3D audio
1) Mono headset in use
left” message 2) Stereo headset in use
heard in both
with mono/stereo
ears, followed
switch set to mono
by “3D audio 3) Incorrect aircraft
right” message
wiring (left/right
heard in both
shorted together)
ears
“3D audio
1) Incorrect aircraft
right” message
wiring (right channel
heard in both
used for mono
ears. “3D
instead of left or left/
audio left” not
right swapped)
heard
28
2) Set mono/stereo switch on headset
to ‘stereo’
3) If after checking solutions #1 and
#2 see a service center as soon as
possible to inspect/correct wiring.
This wiring fault can cause fail-safe
audio not to function.
1) Use a stereo headset
2) Set mono/stereo switch on headset
to ‘stereo’
3) If after checking solutions #1 and
#2 see a service center as soon as
possible to inspect/correct wiring.
This wiring fault can cause fail-safe
audio not to function.
1) See a service center as soon as
possible to inspect/correct wiring.
This wiring fault can cause fail-safe
audio not to function.
Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
3D Audio Troubleshooting
Symptom(s)
Cause(s)
Solution(s)
“3D audio
1) Stereo headset is on 1) Verify correct orientation from the
left” message
backwards
left/right indication on each side of
heard in
the headset or the position of the
right ear only
boom mic (usually attached on left
followed by
side). If the headset is backwards
“3D audio
left/right position information will
right” message
be swapped.
heard in left
2) Incorrect aircraft
2) See a service center as soon as
ear only
wiring (left/right
possible to inspect/correct wiring.
channels swapped)
This wiring fault can cause fail-safe
audio not to function.
“3D audio
1) Aircraft wired for
1) See a service center to wire the
left” message
mono intercom
installation for stereo headsets.
heard in left
ear only, no
audio heard in
right ear.
“3D audio
1) Incorrect aircraft
1) See a service center as soon as
right” message
wiring (right channel
possible to inspect/correct wiring.
heard in right
used for mono
This wiring fault can cause fail-safe
ear only, no
instead of left, or left/
audio not to function.
audio heard in
right swapped)
left ear
3D Audio Troubleshooting
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29
GMA 350H/350Hc Audio Panel
CLEARANCE RECORDER AND PLAYER
The GMA 350H/350Hc contains 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.
An optional external Play button controls the play function. Pressing
the Play button once plays the latest recorded memory block. The Play
function can also be accessed via Voice Recognition commands. Refer to the
‘Voice Recognition’ section for more information.
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 button while audio is playing begins playing the
previously recorded memory block. Each subsequent press of the Play
button selects the previously recorded memory block.
Powering off the unit automatically clears all recorded blocks.
Stops Play
Marker Mute Key
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
VOICE RECOGNITION
Voice Recognition allows the pilot (and optionally copilot) to control the
GMA 350H/350Hc using spoken commands. To activate Voice Recognition,
push and hold the Push-to-Command (PTC) button while speaking a
command. When the Push-to-Command button is released, the GMA
350H/350Hc will respond.
If a command is correctly interpreted by the GMA 350H/350Hc, a
positive acknowledgement chime will be played, and the pilot should verify
that the correct button selection is indicated by the triangular annunciator
lights. Alternatively, some commands will be indicated by a voice response
from the GMA 350H/350Hc. If the desired modes are not indicated by
annunciator lights or a voice response, the pilot should repeat the command
by using the Push-to-Command button, or by manually using the front
panel controls of the GMA 350H/350Hc.
If a command is incorrectly interpreted by the GMA 350H/350Hc, a
negative acknowledgement tone will be played. The pilot should repeat the
command by using the Push-to-Command button, or by manually using
the front panel controls of the GMA 350H/350Hc. In the event of any
abnormal Voice Recognition operation, the front panel controls may be used
to override Voice Recognition and manually control the GMA 350H/350Hc.
The following table lists the available Voice Recognition commands, the
associated actions, and the voice response if applicable:
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GMA 350H/350Hc Audio Panel
Control
COM
Example Phrase
“COM one”
“MIC one”
“COM one MIC”
“COM two”
“MIC two”
“COM two MIC”
“COM three”
“MIC three”
“COM three MIC”
“Split COM”
“Split COM one, two” or“Split
one, two”
“Split COM one, three” or “Split
one, three”
“Split COM two, three” or “Split
two, three”
“Monitored COM mute” OR
“Mute Monitored COM”
AUX
NAV
TRFC
32
“Disable monitored COM mute”
“Monitored COM mute disable”
“Disable mute monitored COM”
OR
“Mute monitored COM disable”
“AUX” OR “Auxiliary”
“NAV one”
“NAV two”
“Traffic”
Action
Toggles COM1 audio
Selects MIC1/COM1 audio
Selects MIC1/COM1 audio
Toggles COM2 audio
Selects MIC2/COM2 audio
Selects MIC2/COM2 audio
Toggles COM3 audio
Selects MIC3/COM3 audio
Selects MIC3/COM3 audio
Selects split COM1/2 mode
Selects split COM1/2 mode
Selects split COM1/3 mode
Selects split COM2/3 mode
Mutes monitored COM on
primary COM reception (refer to
Page 8).
Voice Response: “Monitor
mute enabled”.
Disables monitored COM mute
on primary COM reception
(refer to Page 8).
Voice Response: “Monitored
mute disabled”.
Toggles AUX audio
Toggles NAV1 audio
Toggles NAV2 audio
Toggles TRFC audio (GMA
350H/350Hc Traffic only)
Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
Control
Example Phrase
“Telephone”
“Phone” OR
“Jack”
“Telephone mute”
“Mute telephone”
“Phone mute”
“Mute phone”
“Jack mute”
OR
“Mute Jack”
“Disable telephone mute”
“Mute telephone disable”
“Disable phone mute”
“Mute phone disable”
“Disable jack mute”
“Mute jack disable”
“Telephone mute disable”
“Disable mute telephone”
“Phone mute disable”
“Disable mute phone”
“Jack mute disable”
OR
“Disable mute jack”
“MUSIC”
“MUSIC mute”
OR
“Mute MUSIC”
MUSIC
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“Disable MUSIC mute”
“MUSIC mute disable”
“Disable mute MUSIC”
OR
“Mute MUSIC disable”
Action
Toggles
(TEL/JACK) input
Mutes TEL/JACK on radio
reception.
Voice Response: “Tel and jack
mute enabled”.
Disables TEL/JACK mute on
radio reception.
Voice Response: “Tel and jack
mute disabled”.
Toggles MUSIC input
Mutes MUSIC on radio
reception
Voice Response: “Music 1 mute
enabled”
Disables MUSIC mute on radio
reception.
Voice Response: “Music 1 mute
disabled”.
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GMA 350H/350Hc Audio Panel
Control
ICS Isolation
Example Phrase
“Pilot”
“Copilot”
“Passenger” OR
“Pass”
“Passenger mute”
“Pass mute”
“Mute passenger”
OR
“Mute pass”
“Disable passenger mute”
“Disable pass mute”
“Disable mute passenger”
“Disable mute pass”
“Passenger mute disable”
“Pass mute disable”
“Mute passenger disable”
OR
“Mute pass disable”
“Copilot as passenger” OR
“Copilot as pass”
Copilot
Configuration
“Copilot as crew”
34
Action
Toggles PILOT button
Toggles COPLT button
Toggles PASS button
Mutes passengers during radio
reception.
Voice Response: “Passenger
mute enabled”.
Disables muting of passengers
during radio reception.
Voice Response: “Passenger
mute disabled”.
Configures Copilot as a
passenger.
Voice Response: “Copilot as
passenger”.
Configures Copilot as flight
crew.
Voice Response: “Copilot as
crew”.
Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
Control
Example Phrase
Action
“Manual squelch” OR
Toggles manual squelch mode
“Man squelch”
“Manual squelch threshold up”
“Man squelch threshold up”
Increases manual squelch
“Manual squelch volume up”
threshold
OR
Manual
“Man squelch volume up”
Squelch
“Manual squelch threshold
down”
“Man squelch threshold down” Decreases manual squelch
“Manual squelch volume down” threshold
OR
“Man squelch volume down”
NOTE: Finer manual squelch adjustment may be made using the dual concentric
knobs on the GMA 350. The voice command “Up” or “Down” is equivalent to three
clicks of the inner knob.
Speaker
“Speaker”
Toggles SPKR on/off
(SPKR)
PA
“P - A”
Toggles PA on/off
Marker
“Marker”
Same action as pressing MKR/
Beacon (MKR/ “Mute marker” OR
MUTE (refer to page 4).
MUTE)
“Marker mute”
COM
“Play”
Same action as pressing PLAY
Clearance
“Read back” OR
(refer to page 5).
Recorder
“Say again”
“Cursor off”
Cancels cursor when cursor is
Cursor
“Cursor cancel” OR
flashing
“Cancel cursor”
“(Desired selection*) volume
Increases volume of desired
up”
selection
Volume
Adjustments “(Desired selection*) volume
Decreases volume of desired
down”
selection
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35
GMA 350H/350Hc Audio Panel
Control
Example Phrase
Action
Volume
Displays the current volume but
“(Desired selection*) volume
Adjustments
does not change it
* Desired selection = “Speaker”, “pilot”, “copilot”, “passenger”, “pass”, “marker”,
“aux”, “auxiliary”, “telephone”, “phone”, “jack”, or “music”.
NOTE: Finer volume adjustment may be made using the dual concentric knobs on the
GMA 350. The voice command “Up” or “Down” is equivalent to three clicks of the
inner knob.
“Distribute telephone to (desired
position(s) **)”
OR
“Distribute phone to (desired
Distributes TEL/JACK to desired
position(s)
**)”
positions.
Distribution
(Blue Mode) OR
“Distribute jack to (desired
position(s) **)”
“Distribute music to (desired
Distributes MUSIC to desired
position(s) **)”
position(s)
** Desired position(s) = “All”, “none”, “pilot”, “copilot”, “passenger”, “pass”, or
any combination of pilot, copilot, passenger, or pass.
NOTE: The word “to” may be omitted from distribution phrases.
Enables 3D audio (refer to page
21)
“Three-D audio”
Voice Response: “Three-D
audio left, three-D audio right”
3D Audio
Enables standard audio
(disables 3D audio)
“Standard audio”
Voice Response: “Standard
Audio”
Voice Recognition Commands
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
ENTERTAINMENT INPUTS
The GMA 350H/350Hc provides two stereo telephone/entertainment
inputs:
• The telephone/entertainment (
) Key controls a telephone or
entertainment device connected to the rear of the audio panel or to the
Front Panel Jack.
• The MUSIC Key controls the Entertainment Music audio input.
The Front Panel Jack can be used as an entertainment input or a telephone
input (in which case, it operates simultaneously with the rear telephone
interface). The Front Panel Jack is a 3.5-mm stereo jack that is compatible
with popular portable entertainment devices such as MP3s, CD players,
and cell phones. The headphone outputs of the entertainment devices are
plugged into the Front Panel Jack.
Distribution of the entertainment inputs are configured in Blue-Select
Mode.
TELEPHONE AND ENTERTAINMENT MUTING
Telephone and entertainment muting can be enabled or disabled by the
user, however it is always muted during alerts.
Enabling/Disabling Muting
Press and hold the MUSIC or (
) Key for two seconds to toggle
muting on and off. The aural message “Music 1 Mute Enabled/
Disabled”, “Tel Mute Enabled/Disabled”, or “Bluetooth Mute
Enabled/Disabled” is heard.
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GMA 350H/350Hc Audio Panel
BLUETOOTH® (GMA 350Hc ONLY)
NOTE: Pairing is only necessary during the first attempt to connect a
Bluetooth device to the GMA 350Hc. Once paired, the GMA 350Hc and
the device will connect automatically.
PAIRING A BLUETOOTH DEVICE WITH THE GMA 350HC
Press and hold the inner knob for two seconds. The Bluetooth
Annunciator flashes to indicate the unit is discoverable and the aural
message “Bluetooth discoverable” is heard. The GMA 350Hc will
remain discoverable for 90 seconds or until a successful pair is established.
Once paired, the Bluetooth Annunciator turns steady green and the aural
message “Bluetooth paired” is heard.
ASSIGNING AN AUDIO SOURCE TO THE BLUETOOTH DEVICE
Press the  or MUS key until the annunciator turns blue (the audio
from the Bluetooth source will not be heard until this step is complete).
The key annunciator cycles OFF-GREEN-BLUE. GREEN selects the wired
audio source. BLUE selects the Bluetooth audio source. The BLUE source
assignment will persist through Bluetooth audio connection disruptions.
NOTE: The Bluetooth audio can only be assigned to one source at a time.
Once the Bluetooth audio is assigned to an audio source, the remaining
entertainment audio sources will only cycle between OFF and GREEN.
Bluetooth audio will maintain a separate volume level and Blue Select
distribution from the wired audio source. If the Bluetooth connection is
supporting a phone call, all intercom positions listening to that source can
also speak on the call through the headset MICs.
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Garmin GMA 350H/350Hc Pilot’s Guide
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GMA 350H/350Hc Audio Panel
ADDITIONAL BLUETOOTH CONTROL FUNCTIONS
In addition to the 2 second press and hold of the inner knob discussed
above, the knob has two additional functions that are intended to be
seldom or never used. The following functions are available if needed for
troubleshooting:
•
Press and hold the inner knob for 5 seconds to turn off the Bluetooth
radio. The aural message “Bluetooth off” is heard. This function
electrically turns off the radio, not just the audio source selection. In
the event that Bluetooth radio interference with communication or
navigation equipment is suspected, the Bluetooth radio can be powered
off without powering off the entire audio panel. A subsequent 5 second
press and hold turns the radio back on.
•
Press and hold the inner knob for 10 seconds to clear the memory
of paired devices (up to 10 are stored). Once cleared, the aural
message “Bluetooth list cleared” is heard. This function is used as a
troubleshooting method when a device is not pairing, or to remove a
device that is no longer needed.
CONNECTING BLUETOOTH TO A GARMIN VIRB
The GMA 350Hc 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 350Hc 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 button is not
required. The PILOT annunciator turns blue to indicate this connection.
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GMA 350H/350Hc Audio Panel
BLUETOOTH® RECORDING MODE
Bluetooth® Recording Mode enables the option to record pilot
headphone audio to a Bluetooth® recording device, such as an action
camera, personal digital audio recorder, or a smart phone or tablet
app. Bluetooth® Recording Mode takes all audio routed to the pilot’s
headphones (such as radio, music and intercom audio) and also outputs
that audio to a paired Bluetooth® device. Bluetooth® Recording Mode
requires a device that supports HFP.
To enable Bluetooth® Recording Mode, first connect the Bluetooth®
digital recorder to the GMA. Then press the PILOT key and the small
knob simultaneously. The PILOT annunciator will turn blue to indicate
Bluetooth® Recording Mode is enabled, and the audio clip “Bluetooth
Recording Mode Enabled” will play.
This setting is persistent. Once enabled for a device, the GMA will
automatically enable Bluetooth® Recording Mode for future connections
to that device (until disabled). The same process for enabling Bluetooth®
Recording Mode is used for disabling it. When disabled, the audio clip
“Bluetooth Recording Mode Disabled” will play.
NOTE: When connected to a Garmin VIRB X, Bluetooth Recording Mode
will always be enabled (does not require manual enabling).
FAIL-SAFE OPERATION
If there is a failure of the GMA 350H/350Hc 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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Garmin GMA 350H/350Hc 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
www.garmin.com
© 2011-2013, 2015-2017 Garmin Ltd. or its subsidiaries
190-01134-14 Rev. L
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