Connecting To Other Equipment - NorthStar 951X Installation Manual

SECTION THREE - Interfacing
Setting the NMEA
0183 checksum
Selecting an
independent NMEA
output-port datum

Connecting to other equipment

Connecting to other
Northstar units
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There is no standard for identifying how numbers should be
assigned when converting waypoints from names to numbers.
When you export waypoint information as numbers to a
peripheral device, be aware that numbers aren't sequentially
defined and may be re-used on a random basis.
Certain older devices may not accept sentences containing the NMEA
0183 checksum that's output by the 951 or 952. In such cases, the device
may not operate properly, if at all. If you encounter difficulty when inter-
facing to older equipment, the unit offers the flexibility of turning off the
NMEA 0183 checksum.
1. At the PORT 1 SETUP or PORT 2 SETUP screen, press the &85625
3$' to highlight the NMEA 0183 CHECKSUMS option, then press
the (',7 menu key.
2. Press the &85625 3$' to change the setting from 21 to 2)) and
press the (17(5 key when done.
You can adjust output position for NMEA 0183 ports 1 and 2 to specific
geodetic datums, independently of the datum you choose for positional
display.
1. At the PORT SETUP 1 or PORT SETUP 2 screen, highlight the OUT-
PUT DATUM option, then press the (',7 menu key.
2. Scroll through the choices using the &85625 3$' down to make
your selection. To apply this chosen datum to your lat/lon coordi-
nates in the NMEA 0183 output sentences, press the (17(5 key.
Two 951, 952, or 941 units can be connected in order to take advantage
of the waypoints/routes sharing feature. This convenient feature lets all
waypoints and routes be transferred between any combination of two of
these units.
Using this feature involves three main steps, which you should perform
in the following order:
1. Check that each unit you want to share waypoints and routes with is
operating with software version 3.12 or higher. To determine the
units' current software version, press the 67$5 key until you display
the USER CUSTOMIZATION screen is, then press the 6(59,&(
,1)250$7,21 key to display the SERVICE INFORMATION screen.
The MAIN BOARD SOF VER field displays the current software ver-
sion. If this version is earlier than 3.12, you must upgrade this unit to
version 3.12 before it can share waypoints and routes with another
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NOTE:
951/952 INSTALLATION MANUAL Revision B