GMA 350 pilot’s guide
Copyright © 2011 Garmin Ltd. or its subsidiaries. All rights reserved. This manual reflects the operation of GMA 350 units with mod level 0 or later. Some differences in operation may be observed when comparing the information in this manual to earlier or later Mod status levels. Garmin International, Inc., 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. Tel: 913/397.8200 Fax: 913/397.8282 Garmin AT, Inc., 2345 Turner Road SE, Salem, OR 97302, U.S.A. Tel: 503/391.3411 Fax 503/364.
LIMITED WARRANTY This Garmin product is warranted to be free from defects in materials or workmanship for two years from the date of purchase. Within this 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 and labor, provided that the customer shall be responsible for any transportation cost.
GMA 350 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 350 Controls NOTE: When a key is selected, a triangular annunciator above the key is illuminated. 4 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.
GMA 350 Audio Panel 6 – Selects and deselects audio from a telephone or entertainment device connected to the Front Panel Jack. Audio from a telephone 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. 7 MUS1 – Selects and deselects music entertainment audio. Press and hold to enable/disable MUS1 muting during reception. 8 MUS2 – Selects and deselects music entertainment audio.
GMA 350 Audio Panel 6 15 AUX – When selected, audio from the AUX inputs 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. 19 SPKR – Selects and deselects the cabin speaker.
GMA 350 Audio Panel FEATURES AND OPERATION The GMA 350 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.
GMA 350 Audio Panel MONO/STEREO HEADSETS Stereo headsets are recommended when using the GMA 350. 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.
GMA 350 Audio Panel 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 both MIC Keys simultaneously initiates Split-COM Mode (i.e., COM1/COM2).
GMA 350 Audio Panel TRANSMIT INDICATIONS During COM transmission, the active transceiver (MIC1 or MIC2) Key Annunciator flashes approximately once per second. During Split-COM transmission, the MIC1 annunciator flashes when the pilot’s microphone PTT is pressed. The MIC2 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.
GMA 350 Audio Panel 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 The marker beacon signal sensitivity threshold can be set to High, Low, or User Selectable (toggle switch required).
GMA 350 Audio Panel 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.
GMA 350 Audio Panel 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 350 includes a six-position intercom system (ICS), two MUSIC inputs, and one telephone/entertainment input for the pilot, copilot and passengers. The intercom provides Pilot, Copilot, and Passenger audio isolation. Intercom Controls Press the PILOT, COPLT, and/or PASS Keys to distribute as required.
GMA 350 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 Mode Operation Pilot Isolate Mode In ‘Pilot Isolate’ mode the Pilot, Copilot, and Passengers hear the aircraft audio.
GMA 350 Audio Panel 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 190-01134-12 Rev.
GMA 350 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.
GMA 350 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 190-01134-12 Rev.
GMA 350 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) COPLT PILOT ICS Keys 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.
GMA 350 Audio Panel Blue-Select Mode (Telephone/Entertainment Distribution) The Blue-Select Mode is entered by pressing the small knob when the volume control cursor (flashing white 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.
GMA 350 Audio Panel 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, , MUS1 or MUS2, the Volume Control Knob adjusts the individual volume of the selected source.
GMA 350 Audio Panel 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.
GMA 350 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.
GMA 350 Audio Panel 3D Audio Troubleshooting Symptom(s) Cause(s) Solution(s) “3D audio 1) See a service center as soon 1) Incorrect aircraft right” message wiring (right channel as possible to inspect/correct heard in both used for mono wiring. This wiring fault can ears. “3D instead of left or left/ cause fail-safe audio not to audio left” not right swapped) function.
GMA 350 Audio Panel CLEARANCE RECORDER AND PLAYER The GMA 350 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. Pressing the PLAY Key once plays the latest recorded memory block. The Play function can also be accessed via Voice Recognition commands.
GMA 350 Audio Panel If a command is incorrectly interpreted by the GMA 350, 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 350. In the evenet of any abnormal Voice Recoginition operation, the front panel controls may be used to override Voice Recognition and manually control the GMA 350.
GMA 350 Audio Panel Control MUSIC 26 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 one” “MUSIC two” “MUSIC one mute” OR “Mute MUSIC one” “Disable MUS
GMA 350 Audio Panel Control Example Phrase “MUSIC two mute” OR “Mute MUSIC two” MUSIC ICS Isolation “Disable MUSIC two mute” “MUSIC two mute disable” “Disable mute MUSIC two” OR “Mute MUSIC two disable” “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 is passenger
GMA 350 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 voume down” threshold OR “Man squelch volume down” NOTE: Finer manual squelch adjustment may be made using the dual concentric knobs on
GMA 350 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”, “music one”, or “music two”. 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.
GMA 350 Audio Panel ENTERTAINMENT INPUTS The GMA 350 provides three 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 MUS1 and MUS2 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).
GMA 350 Audio Panel Blank Page 190-01134-12 Rev.
Garmin International, Inc. 1200 East 151st Street Olathe, KS 66062, U.S.A. Toll free: 800.800.1020 or 866.739.5687 p: 913.397.8200 f: 913.397.8282 Garmin AT, Inc. 2345 Turner Road SE Salem, OR 97302, U.S.A. Toll free: 800.525.6726 p: 503.391.3411 f: 503.364.2138 Garmin (Europe) Ltd Liberty House, Bulls Copse Road Hounsdown Business Park Southampton, SO40 9RB, U.K. Toll free (within U.K.) 0808.2380000 p: 44/0870.8501241 f: 44/0870.8501251 Garmin Corporation No.
