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Summary of Contents for Garmin GMA 342
- Page 1 GMA 342 pilot’s guide...
- Page 2 Copyright © 2016 - 2018 Garmin Ltd. or its subsidiaries. All rights reserved. This manual reflects the operation of GMA 342 units. Some differences in operation may be observed when comparing the information in this manual to earlier or later Mod status levels.
- Page 3 (iv) damage caused by service performed by anyone 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.
- Page 4 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.
- Page 5 States of America copyright laws and international copyright treaties. You further acknowledge that the structure, organization, and code of the Software are valuable trade secrets of Garmin and/or its third-party providers and that the Software in source code form remains a valuable trade secret of Garmin and/or its third-party providers.
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Page 6: Table Of Contents
Split-PA Mode ....................17 3D Audio ........................17 Enabling 3D Audio..................17 Clearance Recorder and Player ................19 Entertainment Inputs ....................21 Front Panel Jack....................22 Music Effects ....................22 Entertainment Muting ..................23 Enabling/Disabling Muting ..............23 Fail-Safe Operation ....................24 Garmin GMA 342 Pilot’s Guide 190-01878-00 Rev. C... -
Page 7: Features And Operation
GMA 342 Audio Panel FEATURES AND OPERATION The GMA 342 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, and a 3.5 mm music or phone jack. -
Page 8: Power-Up
GMA 342 Audio Panel POWER-UP The GMA 342 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. -
Page 9: Transceivers
COM2 MIC selects the #1 or #2 transmitter and simultaneously selects the related COM receiver (COM1 or COM2) allowing received audio to be heard. The other COM receiver can be added by pressing the respective key. 190-01878-00 Rev. C Garmin GMA 342 Pilot’s Guide... -
Page 10: Split-Com Mode
By default, while transmitting on a COM channel (as selected with the COM1 MIC and COM2 MIC keys), both the transmitting and receiving audio are heard on the COM channel. The GMA 342 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. - Page 11 COM2 MIC keys. copilot transmits on COM2 independently. * The pilot has priority when transmitting in the case that both crew members attempt to transmit on the same COM. Transceiver Key Functions 190-01878-00 Rev. C Garmin GMA 342 Pilot’s Guide...
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Page 12: Receivers
Selecting a NAV Radio Receiver AUXILIARY INPUTS The GMA 342 has 3 AUX inputs. There are two keys on the unit for AUX1 and AUX2. Pressing the AUX1 key selects or deselects both the AUX1 and AUX3 receivers. Pressing the AUX2 key selects or deselects only the AUX2 receiver. -
Page 13: Marker Beacon Receiver
3000 Hz White (Inner) The GMA 342 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. -
Page 14: Turning Marker Beacon Audio On
INTERCOM SYSTEM (ICS) The GMA 342 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. -
Page 15: Pilot Isolate Mode
The outer, larger knobs are used to control music volume. The left inner knob can be used to turn off the GMA 342 audio panel, by turning fully counter-clockwise until the knob clicks. All backlight and annunciator LEDs will turn off. -
Page 16: Ics Mute Music
Mode. PA Mode is annunciated by a rapid blinking of the SPKR annunciator. When in PA Mode the crew can use the PTT “Push-to-Talk” button to deliver announcements over the speaker and to the passenger headsets. Garmin GMA 342 Pilot’s Guide 190-01878-00 Rev. C... -
Page 17: Split-Pa Mode
COM1 at 11 o’clock 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 342 assumes the pilot sits in the left seat. A Garmin authorized service center can make changes to the default configuration. - Page 18 (right channel possible to inspect/correct wiring. both ears. “3D used for mono This wiring fault can cause fail-safe audio left” not instead of left or audio not to function. heard left/right swapped) Garmin GMA 342 Pilot’s Guide 190-01878-00 Rev. C...
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Page 19: Clearance Recorder And Player
3D Audio Troubleshooting CLEARANCE RECORDER AND PLAYER The GMA 342 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. - Page 20 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 Marker Mute Key Volume Controls Garmin GMA 342 Pilot’s Guide 190-01878-00 Rev. C...
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Page 21: Entertainment Inputs
GMA 342 Audio Panel ENTERTAINMENT INPUTS The GMA 342 provides three stereo entertainment inputs and two telephone inputs. • Press the MUSIC Key to turn music on/off for all positions. The SEL Key selects the music source for all positions. The pilot can choose not to hear music by either turning down the Pilot music volume or enabling PILOT ‘ICS ISOLATION’. -
Page 22: Front Panel Jack
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. Garmin GMA 342 Pilot’s Guide 190-01878-00 Rev. C... -
Page 23: Entertainment Muting
The aural message “Radio Mute Music Enabled/ Disabled” is heard. Press and hold the AUX2 button for one second to toggle intercom muting of music on and off. The aural message “Intercom Mute Music Enabled/Disabled” is heard. 190-01878-00 Rev. C Garmin GMA 342 Pilot’s Guide... -
Page 24: Fail-Safe Operation
GMA 342 Audio Panel FAIL-SAFE OPERATION If there is a failure of the GMA 342 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. - Page 26 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/ 190-01878-00 Rev. C © 2016 - 2018 Garmin Ltd. or its subsidiaries...
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