artisan TRACKPOINT 3 4211A, Руководство по эксплуатации и обслуживанию

Страница: 102 / 253

TRACKPOINT 3 OPERATION
3-39
function is used in situations where the TrackPoint is interfaced to a navigation system and the
navigation system already interfaces to a heading sensor such as a flux gate compass or gyro-
compass. In this case, the TrackPoint’s RS-232 data does not need to be corrected for North refer-
ence. However, the TrackPoint requires a compass input to compensate for vessel motion within its
filtering algorithms. By selecting “Grid Only“ the target data on the TrackPoint screen remains ref-
erenced to North while the RS-232 data is referenced to the bow of the vessel thus allowing both
the TrackPoint II and the navigation system to function properly. To have the TrackPoint Heading
correction applied along with the RS-232 Data Output then select “Both Data O/P & Grid”.
NOTE: When the Compass Correction function is set to “Data O/P Only”, the RS-232 data is
averaged (when Smoothing is enabled). However, the positional data on the screen
of the TrackPoint is only smoothed or averaged prior to the target’s compass correc-
tion resulting in positional changes directly related to the change in compass head-
ing. When the Compass Correction function is set to “Grid Only” the target position
is averaged after the compass has corrected the data for North Reference resulting in
a more “smoothed” target position on the TrackPoint screen.
Analog: For the Analog Heading Sensor electrical interface see Installation, Section 2 above. The
TrackPoint converts the analog Voltage to a ship’s heading in degrees.
In the “Zero degree Voltage” box enter the minimum Voltage that corresponds to zero degrees.
(Range 0 - 5.99VDC) In the “360 degree Voltage” box enter the maximum Voltage that corre-
sponds to 359.99 degrees. (Range 0.1 - 6.0VDC)
When in analog compass mode the heading data is displayed at the top left of the screen and has a
suffix “A” attached to indicate that the data is from the analog input.
Serial: See section 2 (Installation) for wiring the compass to the Deck Unit COMMS connector.
Click on “Port Settings” to select the TrackPoint
3 Deck Unit comport that the compass connects
to. (COM2 or COM3) Set the baud rate, Parity,
Data Bits and Stop Bits to agree with the com-
passes serial port protocol. Refer to section 2 for
COM Port wiring for the COMMS connector.
Format: The Input Format allows selection of
either “HDT”, “HDM” or “HDG” NMEA formats or
the Precision Navigation (PNI) TCM-2 format. Press OK to use the set parameters or Cancel to ig-
nore.