190-00858-11
GMA 35/35c Installation Manual
Rev. H
Page 1-3
1.3.2
Electrical Characteristics
*Depends on configuration settings.
Table 1-2. GMA 35 Electrical Characteristics
Characteristic
Specification
Environmental Compliance
RTCA DO-160E and EUROCAE ED-14E Environmental Conditions
Software Compliance
RTCA DO-178B Level C and D
Temperature Range
-45°C to +55°C (normal operation)
-55°C to +70°C (short term)
Altitude
55,000 Feet
Audio Panel Functions
Transceiver inputs: 3
Receiver inputs: 5
Alert (unswitched) inputs: 5
Input impedance: 600
Ω
Input isolation: 60 dB minimum
Maximum input signal: 5 Vrms
Intercom Functions
Positions: 6 or 7 (pilot, copilot, 4 or 5 passengers)*
ICS volume controls: 3 (pilot, copilot, passenger)
VOX processing: individual processing for each mic input
ICS auto-squelch/VOX: independent DSP determined thresholds for
each mic
Entertainment Functions
Stereo HiFi music inputs: 2
Telephone interfaces: 1
Music and TEL sources individually distributable independent of ICS modes to allow
any combination of source to ICS position distribution.
Combined with independent ICS mode selection, any ICS position can have private
TEL conversations or conference conversations of any combination.
Bluetooth (GMA 35c only)
A2DP, HFP
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)
Marker Beacon Receiver
Frequency: Crystal controlled at 75 MHz
Sensitivity: LO 1000 ìV hard; HI 200 ìV hard
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
TM
marker audio muting
