JA95-001 Audio Controller
Operating Manual
Page 7
Note
: At installation, this switch may be configured to operate
in default or alternative mode. Check with your installing agency
for confirmation of the operation of this switch.
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.
3.4
FM2 PTT Operation
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 FM 2 from transmitting.
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.
3.6
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
).
3.7
Multi-Function (XMIT / ICS) Switch Operation
Default Operation
When in the default XMIT/ICS configuration, this switch acts as the pilot’s
‘Press-to-talk (PTT) button. The unit will transmit on the selected
transceiver when the switch is set to the ‘up’ position, and when set to the
‘down’ position, it will transmit on the intercom.
Alternative Operation
This switch may be configured to provide a ground signal to operate other
equipment.
