NorthStar 951X Installation Manual page 56

SECTION THREE - Interfacing
Setting NMEA 0183
lat/lon precision
Page 46
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device, which transmits completely different and therefore unusable
forms of data.
The talker ID enables you to configure the unit's output data to tell the
listener it's receiving data from a loran (LC) or GPS (GP) navigator, or Inte-
grated Instrument (II). The choice you make depends on what the listener
device is expecting.
1. Check the listener device's instruction manual to determine which
"talker ID" codes it will respond to.
2. At the PORT 1 SETUP or PORT 2 SETUP screen, press the &85625
3$' to highlight the NMEA 0183 TALKER ID option, then press the
(',7 menu key.
3. Scroll through the three choices using the &85625 3$' to make
your selection, and press the (17(5 key when done.
The interfaced equipment will now receive the 0183 data in the correct
nav-source format.
For added versatility in communicating with a variety of other devices,
you can control the level of precision of the 0183 position information as
it is output by the 951/952. The choice you make depends on the equip-
ment to which you're outputting NMEA data. For the number of digits of
precision required for that particular device, refer to the manufacturer's
instructions.
XX.XX ' (lat/lon precision to two decimal places/hundredths of min-
•
utes/or 60 feet)
XX.XXX ' (lat/lon precision to three decimal places/thousandths of
•
minutes/or 6 feet; this is the factory setting)
XX.XXXX ' (lat/lon precision to four decimal places/ten-thousands of
•
minutes/or roughly ½ foot)
The 951/952 conforms to the NMEA version 2.00 standard, and is also
compatible with version 1.50. Equipment typically benefiting the most
from three and four decimal places of precision are electronic and pen
plotting devices. However, most older devices designed to operate with
the original 0183 and other formats can only function with two-place pre-
cision.
1. At the PORT 1 SETUP or PORT 2 SETUP screen, highlight the NMEA
0183 LL PRECISION option, then press the (',7 menu key.
2. Scroll through the three choices using the &85625 3$' to make
your selection, and press the (17(5 key when done.
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951/952 INSTALLATION MANUAL Revision B