Axnes Aviation AS
Document number
Revision
Date
AX-PSB-UMAN-0027
Issue E
2015-03-05
Page 3-2
When the unit is switched on it will automatically load the following settings:
Transmit power level : ‘Normal’
3
Automatic Gain Control: As set at power down
4
Squelch: As set at power down
Volume: Set to factory programmed power up volume setting
NIVOX/PTT mode: As programmed
by user. Factory default ‘NIVOX’
4
Channel: As set at power down
3.3 Change channel
Up to 16 channels may be pre-programmed and selected stepwise by pressing the channel
up and channel down button on the front of the MP20. On the first operation of the channel
buttons, the display will change mode to show the active channel, and repeated pushes will
let you browse through the pre-programmed channels.
Note: For dual band version of the MP20 it is recommended to configure the UHF channels
with display text 90-99 to be able to differ the UHF channels from the maritime VHF
channels. The display text is defined by customer when ordering the units, but limited to 2
decimal numbers.
Units with software version 3.0
4
or higher will indicate VHF channel by an illuminated dot in
the display.
3.4 Walkie-Talkie mode
When no headset is connected to the MP20, the unit can be operated in Walkie-Talkie mode.
In this mode the internal microphone and loudspeaker is utilised and the transmission is
controlled by the side PTT button.
3.5 Helmet/Headset connection
Connect the helmet/headset to the 10 pin connector on the MP20 top panel. Align the two
red marks on the plug and receptacle and push until the plug locks.
The plug cannot be removed by pulling the wire, but must be unlocked by pulling the outer
case of the plug, releasing the locking mechanism.
When a helmet/headset is connected, to the MP20 unit, the Walkie-Talkie function is
disabled (MP20 internal microphone and loudspeaker), and the operational mode is set to
NIVOX or PTT according to the selected default mode
4
.
3
EP transmit power level is only valid for MP20-00U series and should not be altered for MP20-02DB
series.
4
Possibility of changing Automatic gain control, default NIVOX/PTT mode, and display orientation is
not available for software version 3.0 and higher. Units with software version 3.0 or higher will show
the software version as two digits in the display at startup.
