Garmin 011-01257-20 Panduan Instalasi - Halaman 12

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1.3.2 Electrical Characteristics

Characteristic

Regulatory Compliance

Unit Software

CLD (Custom Logic

Devices) Compliance

Temperature Range

Power Requirements

Altitude

Audio Panel

Intercom

Headphone Outputs

Speaker Outputs

Marker Beacon Receiver

Page 1-4

Revision C

RTCA/DO-160D Environmental Conditions and EUROCAE/ED-14D

RTCA/DO-178B Level C

RTCA/DO-254 Level C

-45°C to +70°C

Supply Voltage: 28 VDC

See the Environmental Qualification Form for details on surge ratings and

minimum/maximum operating voltages.

Operating Current: 1.75 amps max at 27.5 V

55,000 Feet

Transceiver inputs: 3

Receiver inputs: 5

Unswitched inputs: 4

Input impedance: 500 Ω

Input isolation: 60 dB minimum

Special functions: Failsafe operation

MASQ

Positions: 5 (pilot and 4 passengers per GMA 1347D)

Volume controls: 2 (pilot, passengers)

VOX level controls: 2 (pilot, passengers)

VOX circuits: 5 (one per mic input)

Music inputs (stereo): 2

Music input impedance: 5 kΩ

Music input level: Less than 500 mVac RMS for full output (typical).

1 Vac RMS MAX (3 Vp-p)

Microphone signal processing: 9 pole characteristic and special cabin

noise band de-emphasis

Intercom isolation modes (-00): 2 (Pilot Isolate, Crew Isolate)

Intercom isolation modes (-20): 4 (Pilot Isolate, Crew Isolate,

Special functions: Recorder with playback (selectable recording of

selected COMs) up to 2.5 minutes of recording time.

Automatic squelch: 5 (one per mic input) pilot selectable between auto

and manual.

Output amplifiers: 2, stereo (pilot, passengers)

Fidelity: Power into 150 Ω

50 mW

100 mW

Frequency response: Music: 50 Hz to 20 kHz nominal

Aircraft radio: 200 Hz to 6 kHz nominal

ICS mic: (Special cabin noise band de-emphasis)

Outputs selectable: 1, pilot selectable

Output power: 10 watts into 4 Ω or 8 Ω, @ any normal supply voltage.

Frequency response: 350 Hz to 6 kHz nominal

Frequency: Crystal controlled at 75 MHz

Sensitivity: LO 1000 μV; HI 200 μV

Selectivity: 6 dB @ ±10 kHz min, 40 dB @ ±200 kHz max.

Input impedance: 50 Ω

External lamp drive: 125 mA max each output

Other outputs: Middle MKR sense

Special functions: SmartMute

Specification

processing

Copilot Isolate, All ICS Mode)

Distortion

<0.5%

<5%

marker audio muting

GMA 1347D Installation Manual

190-00303-21