Garmin GMA 342, Руководство по установке

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190-01878-02 GMA 342/345 Installation Manual
Rev. 5 Page 1-4
1.3.2 Electrical Specifications
Table 1-3 Electrical Characteristics
Characteristic Specification
Environmental
Compliance
RTCA DO-160F
Software
Compliance
RTCA DO-178B Level D
Maximum Absolute
Audio Delay
The Input to Output delay is less than 1.1 ms for all audio I/O excluding
entertainment audio (Music, Telephone, and Bluetooth)
Altitude
55,000 Feet
Overpressure - 15,000 Feet
Maximum Days of
Continuous
Operation
49
Audio Panel
Functions
Dedicated Transceiver inputs: 3 (including TEL) for GMA 342 and 345,
4 (including TEL) for GMA 345 3-COM unit
Dedicated Receiver inputs: 5 (per notes in
Table 1-1 regarding which AUX
inputs are uniquely selectable)
Alert (unswitched) inputs: 4 (each with configurable volume)
Input impedance: 600 Ω
Input isolation: 60 dB minimum
Alert/Receiver/Transceiver bandwidth: 100 Hz to 6.5 kHz
Special functions: Fail-safe operation
All inputs use MASQ™ processing (Master Avionics Squelch)
Max input 5 Vrms
Intercom Functions
Positions: 6 - Pilot, Copilot, 4 Passengers
Volume controls: 4 (Pilot ICS, Pilot Music, Copilot/Passenger ICS,
Copilot/Passenger Music)
Microphone input impedance: 150 Ω (compatible with 150 to 600 Ω mics)
Microphone bias voltage: 11 Vdc delivered through 470 Ω
Intercom isolation modes: 3 - Pilot, Crew, and All
Telephone interfaces: 1 full-duplex (use rear LRU pins or Bluetooth transceiver)
ICS Auto-Squelch/VOX: Independent DSP (digital signal processing) determined
thresholds for each mic.
Note that keyed intercom is optional. Auto-squelch not available when using
keyed ICS.
Headphone
Outputs
Output amplifiers: 3 Stereo - Pilot, Copilot, Passengers
Power, Load, and Distortion: 65 mW into 150 Ohms with <10%
THD+N @ 10% output <3% THD+N
Typical Operating Distortion: <1% THD+N
3dB Frequency Response Bandwidth: 20 Hz to 20 kHz for Music
350 Hz to 6.5 kHz for Other Audio (MICs, Radios, Alerts)