Northern Airborne Technology AMU50-001 - Manual (Page 38)

AMU50-001 Audio Management Unit
Installation and Operation Manual
Section 3 Rev: 1.00
Issue 1 Page 3-2
ENG-FORM: 806-0113.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3.3.3 Transmit Priority
Transmit priority is given to the user who first engages the PTT, and Transmit PTT is given priority over
ICS PTT.
3.3.4 Aural Alerts
Note
: The Aural Alerts are configured at installation, and cannot be modified, selected, or changed in
any way by the operator, or through the ACP. This is included for information purposes only.
Up to eight aural alerts can be configured at installation, and can consist of tones, voice messages or a
combination of both, played once only or repeated.
Repeated aural alerts can be configured to repeat for a set number of times (up to 5), or can repeat
continuously. Continuous aural alerts will continue to play until the trigger condition has been resolved;
otherwise an alert will stop after the set repetition number, and will not play again (unless the trigger
condition is resolved AND the alert is reactivated).
If two or more alerts become active at the same time, the priority of the alert (as configured at installation)
will decide which alert plays first, or the sequence in which they repeat. If two or more alerts that have
been configured as highest priority are triggered at the same time, they will play simultaneously.
User-specific aural alerts are defined at installation. For full information, consult the DevCs manual.
3.3.5 Remote Alert Cancel Switch
CAUTION:
It is important to be aware of all possible implications if
the Aural Alert Cancel switch is activated.
At installation, any Aural Alert generated by the AMU50 may be configured as 'cancellable' or 'not
cancellable'. A remote Alert Cancel switch may be installed in the aircraft, and if a cancellable alert is
playing, this switch can be used to cancel the alert, even if the trigger condition still exists.
Even if the alert is cancellable, an alert will be played at least once before the cancellation takes effect. A
new cancellable alerts triggered after the switch is activated will be unaffected.
3.3.6 Remote Alert Inhibit Switch
CAUTION:
When an Aural Alert Inhibit switch is activated, it is important note that no
aural notification will be generated by the AMU50 for any alert situation.
A remote Alert Inhibit switch may be installed in the aircraft. This switch acts as a mute switch for the
aural alerts generated by the AMU50; it mutes all aural alert tones and/or voice messages to all users.