SPECIFICATION
Intercom
Headphone Outputs
Speaker Outputs
Marker Beacon Receiver
1.4
EQUIPMENT
GMA 340 Audio Panel, Ship Level Assembly, P/N 010-00152-( ) includes the following, depending on part
number:
•
011-00401-( ) GMA 340 Unit Assembly (011-00401-10 replaces 011-00401-00)
•
011-00652-00Connector Kit, GMA 340
•
011-00678-00Rack Backplate, GMA 340
•
115-00262-00SMP, Install Rack, GMA 340
(The installation kit is the same for the GMA 340, GMA 340H and GMA 340 Dual ADF)
1.5
INSTALLATION ACCESSORIES
•
Marker beacon antenna kit (P/N 010-10175-00). [Note: A marker beacon antenna approved to
TSO C35( ) that has been installed to meet the requirements of this manual may be approved for
use with the GMA 340].
GMA 340 Installation Manual
190-00149-01
CHARACTERISTIC
Positions: 6 (pilot, copilot, 4 passengers)
Volume controls: 3 (pilot, copilot, passengers)
VOX level controls: 2 (pilot, copilot/passengers)
VOX circuits: 6 (one per mic input)
Music inputs (stereo): 2 (1 in Dual ADF version) (one input mutable)
Music input impedance: 460 ohms minimum
Music input level: Less than 500 mVac RMS for full output (typical).
1 Vac RMS MAX (3 Vac p-p)
Microphone signal processing: 9 pole characteristic and special cabin
noise band de-emphasis
Intercom isolation modes: 3
Special functions: Configurable aural push-button annunciation for
the crew
Output amplifiers: 3, stereo (pilot, copilot, passengers)
Fidelity: Power into 150
50 mW
100 mW
Frequency response: music; 100 Hz to 15 kHz nominal
Aircraft radio: 100 Hz to 6 kHz nominal
ICS mic: (Special cabin noise band de-emphasis)
Outputs selectable: 1, pilot selectable
Output power: 10 Watts into 4 or 8 , @ any normal supply voltage.
Frequency response: 350 Hz to 6 kHz nominal
Special functions: PA Mode, pilot selectable, including split operation
Frequency: Crystal controlled at 75 MHz
Sensitivity: LO 1000 µV hard; HI 200 µV hard
Selectivity: 6 dB @ ±10 kHz min, 40 dB @ ±200 kHz max.
Input impedance: 50
External lamp drive: 125 mA max each output
Other outputs: Middle MKR sense
Special functions: SmartMute
Distortion
<0.5%
<5%
TM
marker audio muting
Page 1-3
Rev. L
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