Pilots can select audio from transmit (TX) and receive (RX), LIVE, KEYED, or voice activated (VOX) intercom, in addition, handheld microphone transmission and pilot isolation/emergency operations are also provided.
This AMS43 single-channel audio controller is TSO certified.
Features:
- Audio Controller provides transmit and intercom capabilities for pilot and co-pilot, plus intercom for four up to passengers
- Panel controls include master RX volume, ICS volume, and ICS squelch (VOX adjust)
- ICS Tie line provided to allow multiple controllers to be networked
- Select between COM1, COM2, AUX, FM1, FM2, PA, NAV1/2, ADF1/2, DME/MKR inputs
- Transmit capability for five COM channels with auto-receive functions
- Receivers select switches allow for first four COM channels
- High headphone output provides up to 500mW per channel
- Intercom supports two crew and and passenger stations
- Active Noise Filtering (ANF) intercom system
- Voice activated (VOX) squelch
- Two direct inputs are provided to accommodate functions such as Rad Alt, GPS Alerts, Low
- Rotor, or Telephone Ringer
- Front panel selectable emergency mode switches the pilot's headphones directly to selected radio
- Three internal alert tone generators: single-tone, two-tone, and timed siren
Specifications
Weight:
2.1 lb (955 g)
Dimensions:
1.9 x 6.82 x 5 in (48.3 x 173.2 x 125 mm)
Mounting:
Dzus rail
Faceplate:
Engraved acrylic edge lit panel
Material/Finish:
Chassis & cover are 5052-H32 brushed aluminum with
conversion coating finish
Connectors:
Male 50 pin & 37 pin D-sub connectors with slide locks
Temperature:
-20°C to 55°C, operating
-55°C to 85°C, survival
Altitude:
25,000 ft
Input Power:
27.5 VDC @ 0.5 A, nominal
Lighting Voltage:
27.5 VDC @ 150 mA, nominal
Alert Power:
27.5 VDC 150 mA, nominal
INPUT SIGNALS:
Quantity:
13 receive channels
7 Mic channels
1 ICS tie channel
2 direct channels
Audio Level:
2.5 Vrms (receiver inputs)
0.25 Vrms (mic inputs)
0.34 Vrms (ICS tie input)
2.5 Vrms (direct audio inputs)
Impedance:
1KΩ ±10% (receive inputs)
1KΩ ±10% (mic inputs)
1.8KΩ ±10% (ICS tie input)
1.3KΩ ±10% (Direct Audio 1 input)
100Ω ±10% (Direct Audio 2 input)
Circuit Type:
All single ended inputs
Coupling:
< -50dB
Keylines:
Pilot & Copilot Transmit PTT
Rear Hand mic Transmit PTT
Pilot & Copilot ICS PTT
3 Alerts - active low
OUTPUT SIGNALS:
Quantity:
6 Headset outputs
6 Transmitter mic outputs
5 Transmitter keyline outputs
Rated Level:
Headset: 7.7 Vrms or 100 mW (20 dBm) into 600Ω
Direct Audio 1: 10 mW (10 dBm) into 600Ω
Direct Audio 2: 0.1 mW (-10 dBm) 0.25 Vrms into 600Ω
Alert level: 90mV rms ±10% into 600Ω
Impedance:
65Ω, maximum
Circuitry Type:
Single-ended, except for phones, which are balanced
Frequency Response:
Sidetone: <3 dB from 650 Hz to 1750 Hz
Receive inputs: <3 dB from 500 Hz to 2200 Hz
Intercom: < 3 dB from 550 Hz to 2400 Hz
Alert 1: 1.5kHz + 20%
Alert 2: Same tone as Alert #1 but swept @ 2 cycles/sec
Alert 3: Approx. same as Alert 2 but on for 2 sec
Distortion:
< 10% THD @ rated power output
Audio Noise Level:
< -50 dB
Coupling:
< -50 dB
Output Regulation:
< 10% distortion and <3 dB max. of rated load output power at 400% and 75% of rated load
Annunciators:
Green LED will light for transmit operation