GMA 350/350c pilot’s guide
Copyright © 2011, 2015 Garmin Ltd. or its subsidiaries. All rights reserved. This manual reflects the operation of GMA 350/350c units. 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.
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.
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.
GMA 350/350c Audio Panel Controls 1 11 2 3 4 5 6 7 8 9 12 13 14 15 16 17 18 19 24 25 10 20 21 GMA 350 Controls 22 23 26 GMA 350c (Bluetooth) Controls NOTE: When a key is selected, a triangular annunciator above the key is illuminated. 1 6 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.
GMA 350/350c Audio Panel 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 NAV1 – When selected, audio from the #1 NAV receiver can be heard. 5 NAV2 – When selected, audio from the #2 NAV receiver can be heard.
GMA 350/350c Audio Panel 8 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 receive can be added by pressing the COM1 Key. Selection of a second MIC button initiates Split-COM mode. When in Split-COM mode, the pilot is using COM1, the copilot is using the COM2. 14 PLAY – Press once to play the latest recorded memory block.
GMA 350/350c Audio Panel 22 Bluetooth® Connection Annunciator – (GMA 350c only) A flashing blue annunciator indicates the unit is discoverable. A solid blue annunciator indicates an active Bluetooth connection. 23 Key Annunciator – (GMA 350c 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 WHITE to BLUE. WHITE selects the wired audio source and BLUE selects the Bluetooth audio source.
GMA 350/350c Audio Panel Features and Operation The GMA 350/350c 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 350/350c Audio Panel Mono/Stereo Headsets Stereo headsets are recommended when using the GMA 350/350c. 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 350/350c 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 350/350c 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 350/350c 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.
GMA 350/350c 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 350/350c 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.
GMA 350/350c Audio Panel 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. The Copilot and Passengers also hear each other. Aircraft Audio PILOT COPLT PASS ICS Keys 190-01134-12 Rev.
GMA 350/350c Audio Panel 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 COPLT PASS Mode Operation 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.
GMA 350/350c Audio Panel 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 COPLT PASS Mode Operation 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 190-01134-12 Rev.
GMA 350/350c Audio Panel 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 PASS COPLT Mode Operation 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.
GMA 350/350c Audio Panel 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 white annunciator/ or flashing blue annunciator in Blue-Select Mode) to select the audio source to adjust.
GMA 350/350c Audio Panel 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/entertainment audio to selected crew/passenger positions. Turn the large knob to select MUS1 or MUS2 and select the crew positions to receive the music audio. Selecting any key other than PILOT, COPLT, PASS, MUS1, MUS2, will cancel Blue-Select Mode.
GMA 350/350c Audio Panel Manual Squelch Annunciator; Off for Automatic Squelch, On Relative Volume/ for Manual Squelch Squelch Scale Volume or Manual Squelch Cursor Volume/Squelch Control 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.
GMA 350/350c Audio Panel 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 both MIC Keys simultaneously, then press and hold the SPKR Key for 2 seconds. 3D Audio 3D Audio is useful when multiple audio sources are present.
GMA 350/350c Audio Panel 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.
GMA 350/350c Audio Panel 3D Audio Troubleshooting “3D audio 1) Stereo headset is on 1) Verify correct orientation from left” message backwards the left/right indication on heard in each side of the headset or right ear only the position of the boom MIC followed by (usually attached on left side). “3D audio If the headset is backwards, the right” message left/right position information heard in left will be swapped.
GMA 350/350c Audio Panel Pressing the PLAY Key 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 Key while audio is playing begins playing the previously recorded memory block.
GMA 350/350c Audio Panel If a command is incorrectly interpreted by the GMA 350/350c, 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 350/350c. 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 350/350c.
GMA 350/350c Audio Panel Control MUSIC 190-01134-12 Rev.
GMA 350/350c 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 pass
GMA 350/350c 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 knob
GMA 350/350c 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 350/350c. The voice command “Up” or “Down” is equivalent to three clicks of the inner knob.
GMA 350/350c Audio Panel Entertainment Inputs The GMA 350/350c 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 350/350c Audio Panel Bluetooth® (GMA 350c Only) NOTE: Pairing is only necessary during the first attempt to connect a Bluetooth device to the GMA 350c. Once paired, the GMA 350c and the device will connect automatically. Pairing a Bluetooth Device with the GMA 350c 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.
GMA 350/350c 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.
GMA 350/350c Audio Panel Fail-Safe Operation If there is a failure of the GMA 350/350c 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. 36 Garmin GMA 350/350c Pilot’s Guide 190-01134-12 Rev.
GMA 350/350c Audio Panel 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.
