JA95-N22 Audio Controller - Flight Crew - NVG
Installation and Operating Manual
Rev A
Page 19
3.3.2
Receiving
When the JA95-N22 receives an incoming transmission on a transceiver or receiver that has been selected, either by
the white transceiver receive switches (
1
) or the transmit selector (
8
), the incoming audio will be directed to the user’s
phones.
The audio level of any incoming transmission will depend upon the level selected by the front panel RX volume control
(
3
). It will be muted if the unit is transmitting and muting of receive audio during transmit is enabled.
3.3.3
Transmitting (Transmit Operation)
To select a transceiver, rotate the Transmit Select Switch until it aligns with the line leading to the Transceiver Select
switch legend (see
1
) - default legends COM1, COM2, AUX, FM1, FM2, or FM3. The corresponding Transmit Select
annunciator will illuminate.
When the user’s TX PTT is activated, the unit will transmit on the selected transceiver, and the deadfront Transmit
Annunciator (
7
) will illuminate ‘TX’. All MIC and sidetone audio will be routed to the user’s phones, and any music will
be muted for the duration of the transmission.
3.3.4
FM2 PTT Operation
Note
: If the FM2 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 FM2 has been selected for transmit, momentarily
activating the TX PTT will keep the FM2 transmitting. A second momentary activation of the TX PTT, or moving the
Transmit Selector away from FM2, will stop the FM2 from transmitting.
3.3.5
VOX Operation
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 when the MIC audio level falls below the VOX threshold for 0.5 to 2
seconds.
3.3.6
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 unless isolation status (ISO)
has been selected on the ISO/ALL switch.
The ICS audio is output on the phones of each user.
The ICS audio is muted during transmit.
The ICS audio level at the phones is controlled by the ICS volume control (
11
).
3.3.
7
CALL Annunciator
Operation
When another audio controller's CALL SWITCH output signal (i.e. from a JA95-N32) is connected to the JA95-N22's
CALL ANNUNCIATOR input signal
t
hen the JA95-N22's CALL ANNUNCIATOR will illuminate and the CALL
ALERT
aural message will be played when the other audio controller's CALL switch is operated
.
