JA95-043 Audio Controller - AMS43 Compatible
Installation and Operating Manual
Rev B
Page 20
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 (either from the faceplate or by some other method) 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.
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 (
12
).
3.3.7
Music Operation
Music to the phones will be muted by incoming audio (ICS, Receive, Direct or Alert Audio) or if the unit is transmitting.
When the incoming audio has ended, the music will gradually return to the previous level.
Music (either from the rear tape input or from the front panel music input or both) will also be muted if the TAPE/OFF
switch is in the OFF position. Placing the switch in the TAPE position will allow the music to be unmuted.
3.4
Emergency Operation Mode
Emergency mode can be selected by the Mode switch on the front panel, or entered automatically if power to the unit is
lost.
3.4.1
Auto Emergency Mode
If the unit is in emergency mode because power has been lost to the unit, the sum of the COM1 transceiver, NAV1
receive, and DIRECT AUDIO will be routed to the pilot’s phones. The pilot's microphone and transmit key are connected
to the COM1 transceiver. No other function in the JA95-043 will operate when power is lost. Indicator LEDs, legends and
annunciators will not be illuminated.
3.4.2
Selected Emergency Mode
If the unit is in emergency mode because the EMER / NORM switch is in the EMER position and sufficient power is
applied to the JA95-043, the sum of the COM1 receive, NAV1 receive, DIRECT AUDIO and Alert audio will be routed to
the pilot’s phones. The pilot's microphone and transmit key are connected to the COM1 transceiver. The pilot is
disconnected from the ICS. The COM1 transceiver and NAV1 receiver and DIRECT AUDIO are not available to the other
users. All other functions of the JA95-043 will operate. The LEDs, legends and annunciators will retain normal
functionality.
