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JA94-N01A Dual Audio Controller - NVG
SECTION 1 - DESCRIPTION
1.1
System Overview
The JA94-N01A Dual Audio Controller - NVG is a centralized management system for two independent users that
distributes and controls all transceiver, receiver and warning source audio in an aircraft. It enables the selected
transmission of microphone audio to one or more transceivers and distributes all intercom audio. The JA94-N01A dual
audio controller can be used in a standalone configuration or a star configuration to prevent the loss of the entire
system due to the failure of one controller. It provides a passive emergency mode that directs the Right User to the
COM1 transceiver and NAV1 receiver, and the Left User to COM2 transceiver and NAV2 receiver.
The JA94-N01A is set up on a per-installation basis using a configuration cable and a PC running the product configuration
tool to download system configuration settings via the front panel music / configuration connector. To facilitate future
customizations and certification, neither software nor complex electronic devices are used in the JA94-N01A design.
1.2
Features Overview
The JA94-N01A features a 37 pin D-Min connector, which interfaces to the radio receive audio and user phones, and
50 pin and 15 pin D-Min connectors which interface to the power and passenger headset connections. This layout
minimizes crosstalk and follows industry standard interconnect for multi-user single channel audio controllers.
Numerous input and output levels are adjustable and several audio paths are selectable using the configuration tool
ProCS™ (Product Configuration Software) to write configuration commands via a configuration cable to the front panel
music / configuration connector. The configuration commands set the level of non-volatile digital control potentiometers
to control audio signal levels and to non-volatile expander latches which are connected to audio gates to control the
audio signal routing.
The JA94-N01A may be configured as a drop-in replacement for the Cobham/NAT AA92, AMS42 & AMS44.
The JA94-N01A supports up to 6 transceivers, each selectable from two rotary switches.
The JA94-N01A supports up to 4 selectable receivers in two banks of 4 switches.
The JA94-N01A provides intercom functions for up to 2 users and up to 6 passengers.
The JA94-N01A has individual VOX gating for each user and passenger.
The JA94-N01A supports two Direct Audio inputs to Left and Right Users in Normal and Emergency mode.
The Direct Audios may be routed to both Left and Right User phones or Direct Audio 2 routed to Right User and Direct
Audio 1 to Left User.
Passengers do not hear Direct Audio 1 & 2.
The JA94-N01A supports a third Direct Audio input in Normal mode only.
All users can hear Direct Audio 3
The JA94-N01A allows the receive audios to be disconnected from the Passenger Phones.
The JA94-N01A supports two CVR outputs.
The JA94-N01A allows transmit access for five crew members (Right User, Left User, Passenger 1, Passenger 2, and
Passenger 6).The JA94-N01A allows ICS PTT access for all users and passengers.
The JA94-N01A features a Music / Configuration connector on the faceplate for configuration of audio levels and
routing. The port can also be used as a music input and is compatible with most music players.
The JA94-N01A has three modes of operation: Normal Mode, Emergency Mode and ICS Isolate Mode.
The JA94-N01A supports radio simulcast.
The JA94-N01A supports a remote transmit select input.
The JA94-N01A is NVIS Type I Class B compliant.
