Transas T214, Техническое руководство

Страница: 62 / 115

Navigational data sources setup
TRANSAS AIS BASE STATION T214. Technical Manual.
60
a switch from a higher priority to the lower priority source is made if the former is
disabled for 5 seconds. A switch to the higher priority source is made within 30
seconds of its recovery.
6.7.2
Creating virtual sources of coordinates
Virtual sources of coordinates are created in the Configuration->Setup-
>Sensor setup-> Sources of position menu. The “Sources of position” screen is
displayed.
It can be seen from the drawing that the table contains entries for assigning up to 8
virtual sources of coordinates. The “Change” button allows assignment of virtual
sources to be changed. The “Reset” button deletes all the user-entered assignments
and sets standard assignments in compliance with IEC-61993-2 standard.
The assignment of each virtual source in fact means the determining of a filter for
incoming NMEA sentences. The filtering criteria include: serial port number (Port),
sentence source identifier (Talker), sentence identifier (Sentences), differential mode
attribute, electronic navigational system type (EPFS modes). If a filter lets through
incoming NMEA sentences, it means that this virtual source is operating and
supplies the Base Station with positioning data.
If virtual sources of all the types are set to the initial condition (by using the “Reset”
button), operation of AIS Base Station T214 in the part of receiving position data, is