GARMIN's new GMA 340 audio panel meets the needs of aircraft owners and operators who require reliability and versatility in the essential audio switching function. The GMA 340 features innovative LED-illuminated push button controls that allow audio selection of both NAV and Comm audio. Large buttons activate the Comm microphone and audios for up to three Comm transceivers to simplify cockpit workload.
Another feature of the GMA 340 is the Split Comm, which allows the pilot to transmit/receive on Comm 1 and the co-pilot to transmit/receive on Comm 2. Comm transmit indication is also provided.
Speaker selection is available to monitor the aircraft radios or to make PA announcements. There are two unswitched inputs for telephone ringers, altitude alert warnings, or other warning tones. In addition, the GMA 340 includes a six-place VOX intercom with three selectable modes of isolation, dual stereo music inputs, and independent pilot, co-pilot, and passenger volume control. Each microphone input has a dedicated VOX circuit to ensure that only the active microphone is heard when squelch is broken.
Also standard is the three-light Marker Beacon Receiver/Indicator with high/low sensitivity selection and audio muting with automatic rearming. Surface mount technology provides shallow depth and light weight, which simplifies installation in the tightest aircraft spaces and saves precious panel space. Operation is available in 14 or 28 volts without voltage converters or dropping resistors. Installation is simplified with the built-in intercom and marker beacon, and the GMA 340 also features photo cell dimming of annunciators, pilot fail-safe mode connection to Comm 1, and FAA TSO approval.
Two versions available
GMA340 Standard for Fixed Wing (010-00152-11)
GMA340H for Rotary Wing (010-00152-03)
| General Specifications
| TSO Compliance: ||TSO-C50c, TSO-C35d Weight: 1 lb., 10oz. (installed)|
|Physical Dimensions: ||Length 6.4in , Width: 6.29in , Height: 1.3in|
|Power Requirements: ||Supply voltage: 11-33 Vdc o Operating current: 2.2A (13.8V, speaker on)|
|Temperature Range: ||-20C to +55C (normal operation)|
|Altitude: ||50,000 MSL unpressurized|
| Marker Beacon Reciever
| Frequency: ||Crystal controlled at 75 Mhz|
|Sensitivity: ||LO 1000 uV hard o HI 200 uV hard|
|Selectivity: ||6 dB @ +/- 10kHz min. 40 dB @ +/- 200 kHz max|
|Input Impedance: ||50 ohms External lamp drive: 125 mA max each output|
|Other Outputs: ||Middle MKR sense|
|Special Functions: ||Audio muting with auto re-arm feature|
| Audio Panel
| Transceiver Inputs: ||3 Receiver inputs: 5 Unswitched inputs: 2 Input impedance: 500 ohms Input isolation: 60 dB min|
|Special Functions: ||Fail-safe operation|
| Positions: ||6 (pilot, copilot, and 4 passengers)|
|Volume Controls: ||3 (pilot, copilot, and passengers)|
|VOX Level Controls: ||2 (pilot, copilot/passengers)|
|VOX Circuits: ||6 (one per mic input)|
|Music Inputs: ||2 (one input mutable)|
|Intercom Isolation Modes: ||3 (pilot, crew, all) Intercom functionality in split com mode|
|Full Microphone Signal Processing: ||9 pole characteristic and special cabin noise band de-emphasis|
|Special Functions: ||Configurable aural push-button annunciation for the crew|
| Speaker Outputs
|Outputs Selectable: ||1, pilot selectable|
|Frequency Response: ||350 to 6 kHz nom|
|Special Functions: ||PA Mode, pilot selectable, including split operation|
| Headphone Outputs
| Output Amplifiers: || 3, stereo (pilot, copilot, passengers) Fidelity (Power and Distortion) Power (per stereo Distortion channel)|
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