GMA340是GARMIN最新推出的音频设备。该设备为飞机及其用户提供了符合高可靠性和多功能性的基本音频转换功能。
比起同类产品，它具有更佳的性能和更领先的技术。内部通话、信标台跟踪及特有的多项捕入等各项性能，无一都体现着GMA340的优势。
独有的立体声音频输出，独有的分瓣式通讯发射/接收功能，当正驾驶用COM1发射和接收信号的同时副驾驶可以用COM2进行发射和接收信号。
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Specifications
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General
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*Requires
Adobe Reader 4.0+
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TSO Compliance: TSO-C50c, TSO-C35d
Weight: 1 lb., 10oz. (installed)
Physical dimensions:
- Length 6.4"
- Width: 6.29"
- Height: 1.3"
Power Requirements:
- Supply voltage: 11-33 Vdc
- Operating current: 2.2A (13.8V, speaker on)
Temperature range: -20°C to +55°C
(normal operation)
Altitude: 50,000 MSL unpressurized
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Marker Beacon Receiver
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Frequency:
Crystal controlled at 75 Mhz
Sensitivity:
- LO 1000 uV hard
- 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: SmartMute™
marker audio muting
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Audio Panel
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Transceiver inputs:
3
Receiver inputs: 5
Unswitched inputs: 2
Input impedance: 500 ohms
Input isolation: 60 dB min
Special functions: Fail-safe
operation; MASQ™ processing
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Intercom
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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 (stereo): 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
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Speaker
Outputs
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Outputs
selectable: 1, pilot selectable
Output power: 10 Watts into 4 or
8 ohms, any normal supply voltage
Frequency response: 350 to 6 kHz
nom
Special functions: PA Mode, pilot
selectable, including split operation
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Headphone Outputs
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Output amplifiers: 3,
stereo (pilot, copilot, passengers)
Fidelity (Power and
Distortion):
| Power
(per stereo channel) |
Distortion |
| 50 mW into 150 ohms |
< 0.5% |
| 100 mW into 150 ohms |
< 5% (<1% typ) |
Frequency response:
- Music: 100 Hz to 15 kHz nom
- A/C radio: 100 Hz to 6 kHz
nom
- ICS mic: (Special cabin noise
band de-emphasis)
Mono
headsets in stereo installation: No damage will
occur; Stereo/mono switches are not required
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