Axnes AS
Document number
Revision
Date
AX-PNG-UMAN-1220
Issue C
2018-Jun-05
Page 2-11
Confidential document and information
communicating over the maritime VHF band. Switching between intercom mode and direct
mode is done by pressing both configuration buttons (up and down) simultaneously. When
changing mode, the last used VHF channel or last used intercom configuration is activated.
Key lock
The configuration and menu keys are protected with key lock to avoid inadvertent change of
operational mode.
The keys are unlocked by pressing OK and MENU simultaneously.
Key lock is reactivated after 20 seconds of inactivity.
When key lock is active, the following status information is available by pressing:
Configuration up or down:
Current selected configuration/channel
OK:
•
Battery status indicated as B1 to B9
•
Receive signal strength R0 to R9
•
GPS lock status (off/searching/locked/sleep)
Even if key lock is active, it is possible to change between direct mode and intercom mode
by pressing configuration up/down simultaneously.
GPS positioning
The MP50 includes a GPS module to allow position reporting to the PNG Base Station.
When the positioning is enabled in the MP50 menu, the GPS module operation is controlled
by the base station, and no local control is needed. The GPS status can be checked by
pushing the OK button while key lock is active, and will give one of the following statuses:
•
‘off’ - the GPS positioning is disabled in the MP50 menu.
•
‘searching’ - the MP50 is searching for GPS signals. If the status continues in
‘searching’ for a long time, it is recommended to move to a position with assumed
better GPS satellite coverage.
•
‘locked’ - the MP50 has got a GPS lock and is able to send position reports to the
PNG Base Station.
•
‘sleep’ - the MP50 has had a GPS lock, but no base station is currently polling for
position reports. The GPS module goes to sleep mode, but will be reactivated when
the base station starts polling for position reports.
