GMA™ 345

Physical & Performance

• Electrical: 14-28 VDC
• Unit Size: 6.3"W x 1.33"H x 8.09"D (160 x 34 x 205 mm), includes mounting rack and connectors
• Weight: 1.78 lbs (807.4 g), includes rack, backplate and connectors

Environmental

• Temperature: -20° C to +55° C (operating)
• Altitude range: to +55,000 ft. MSL unpressurized
• Power requirements: 11 to 33 VDC input                                                        

Radio Inputs

• Impedance: 600 ohm
• Max input: 5 Vrms
• Isolation: 60 dB minimum
• Bandwidth: 100 Hz to 6.5 kHz
• Transceiver: 3 (2-comm version, including TEL) or 4 (3-comm version, including TEL)
• Receiver: 5 (NAV1, NAV2, AUX1, AUX2, AUX3)
• Alerts: 4 (unswitched)
• Telephone input: 1

Intercom Functions

• Positions: 6 (pilot, copilot, 4 passengers)
• Volume control: 2 (pilot, copilot/passengers)
• VOX: Automatic (1 per MIC input)
• Modes: Pilot, crew, all
• MIC impedance: 150 ohm
• MIC bias: 11 VDC through 470 ohm
• Keyed ICS: Configurable

Music functions

• Inputs: 2 (Independent from Bluetooth audio)
• Impedance: 600 ohm (differential)
• Max input: 3.0 Vrms
• Gain: +24 dB Max/-96dB Min
• Input level: < 200 mVrms at max gain for full power out
• Bandwidth: 20 Hz to 20 kHz
• Distortion: < 0.1% THD+N typical at full power over full bandwidth
• Muting: Selectable and configurable
• Volume Control: Knob controlled (Pilot and copilot/passenger)

Bluetooth     

• Supported profiles: A2DP (music streaming), AVRCP (music playback control) and HFP (phone)
• Paired devices stored: 10
• Connections allowed: 1 device
• Supported devices: Phones, tablets, VIRB XE, VIRB Ultra 30 and select 3^rd party cameras
• Volume: Set by device and adjustable using GMA controls

Headphone Outputs

• Output amplifiers: 3 stereo (pilot, copilot, passenger)
• Output power: 65 mW into 150 Ohms pilot and copilot, 260 mW into 37.5 Ohms passenger
• Distortion: < 3% THD+N at 10% Power, < 10% THD+N at full power
• Frequency response: 20 Hz to 20 kHz
• Impedance rated: 150 Ohm pilot/copilot, 37.5 Ohm passenger (4-150 Ohm headsets)
• Impedance supported: 150 to > 600 Ohm

COM/TEL Microphone Outputs

• Output power: 15 mW into 150 Ohms (1.5 Vrms)
• Distortion: < 3% THD+N at 10% power, < 10% THD+N at full power
• Frequency response: 300 Hz to 6 kHz

USB Charge Port

• Rated power: 10 Watt
• Max charge current: 2.1 Amps
• Overcurrent protection: USB charge port protection with current > 2.3 Amps
• Charging scheme: DCP

Speaker

• Outputs: 1
• 28 Volt aircraft: 10 Watt into 4 Ohm; 7 Watt into 8 Ohm
• 14 Volt aircraft: 3 Watt into 4 Ohm; 8 Ohm Not Recommended
• 3dB@1kHz Bandwidth 350 Hz to 6.5 kHz
• Distortion: < 10% THD+N at full power, < 3% THD+N at 10% power

Voice Recorder

• Record time max: 1 minute       

Code Load Options

• SD Card

DIP Switch

• Config switches: 8 (see install manual for descriptions)

Lighting Bus

• Voltage: 14 V or 28 V