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3.1
Introduction
This section contains the operating instructions for the JA98-001.
Although the JA98-001 is not provided with any front panel or operator controls, a basic knowledge of the functionality
of the unit is necessary to understand how it interfaces (via a RS-232 interface) with any remote operating system
such as a Multi-Function Display (MFD).
For selection of receivers, transceivers and other controls, refer to the MFD manual.
3.2
Normal Mode of Operation
The JA98-001 is in Normal mode when aircraft electrical power is applied to the POWER INPUT and Pin 1 of J12 is
connected to ground.
3.2.1
Receiving
The MFD controls which transceivers and receivers are selected for receive operation. When receive audio is input to
the JA98-001 on a transceiver or receiver that has been selected, the incoming audio is directed to the user's phones.
The MFD controls the receive volume level. When the configuration setting Mute RX Audio is enabled, the receive
audio is muted during transmit.
3.2.2
Transmit Operation
The MFD controls which transceiver is selected for transmit. When the user's TX PTT is activated, the unit will key the
selected transceiver. The user's MIC audio is routed to the selected transceiver, and sidetone audio is routed to the
user's phones, and music is muted for the duration of the transmission.
3.2.3
COM5 PTT Operation
Note: If the COM5 transceiver has been configured as duplex, it can be used with a cellphone or
sat-phone. Check your configuration with the installing agency.
If the unit has been configured for cellphone or sat-phone use and COM5 has been selected for transmit, momentarily
activating a TX PTT will start COM5 transmitting. A second momentary activation of the same TX PTT or selecting a
different Transceiver from the MFD will stop COM5 transmitting.
3.2.4
VOX Operation
The VOX threshold is set from the MFD.
A user's MIC audio is routed to the ICS when the MIC audio level exceeds the VOX threshold.
A user's MIC audio is disconnected from the ICS after the MIC audio level falls below the VOX threshold for 0.5 to 2
seconds.
3.2.5
ICS Operation
ICS audio is the sum of all the MIC audio from users with ICS KEY active or with MIC audio level exceeding the VOX
Threshold level.
The ICS audio also includes the audio input on the ICS TIE from other audio controllers.
Rev A
JA98-001 Remote Mount Audio Controller
SECTION 3 – OPERATION
Page 17
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