Axnes AS
Document number
Revision
Date
AX-PNG-UMAN-1220
Issue C
2018-Jun-05
Page 2-10
Confidential document and information
Local mode
The MP50 has an internal microphone which can be used for casualty communication, by
activating Local mode. Local mode is available when a headset is connected.
In Local mode, audio picked up from the surroundings is mixed with any radio received audio
and injected into the headset, and allows communication with individuals around the operator
without removal of the helmet. The microphone signal from the headset is muted, so the
communication between the MP50 operator and the surroundings is not transmitted.
Local mode is activated by pressing the Configuration Up and the primary PTT
simultaneously.
To leave Local mode and enter VOX mode, press the Configuration Up and the primary PTT
simultaneously.
Charging
The MP50 is charged when placed in a CHG50 or CHG55 charger. Detection of the charger
will be indicated with a battery symbol, and the charge status is indicated with a gradually
filling bar as charging progresses.
If the MP50 is turned off when installed in the charger, the MP50 will indicate charging status,
but remain in radio off mode.
If the MP50 is turned on when installed in the charger, the MP50 will indicate charging status,
and remain in active radio mode.
Charging time is expected to be around 3 hours, but depending on the surrounding
temperature, charge time may increase or be disabled. Charging is disabled below 0°C and
above 50°C. If temperature is below 10°C or above 40°C, the charge current is reduced and
additional charging time must be expected.
Changing configuration/channel
In intercom mode, different pre-configured configurations may be selected by pressing the
configuration up or down buttons. The short name of the configuration is displayed before the
long name is scrolled.
When in direct mode, the different channels are navigated in the same manner.
Changing direct/intercom mode
The MP50 has two operational modes. It can be in either intercom mode where it is
connected to the aircraft installed PNG Base Station, or it can be in direct mode where it is
