AMS43 Single-Channel Audio Controller | TSO

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