NorthStar 951X, Installation Manual

Page: 56 / 80

SECTION THREE - Interfacing
Page 46 951/952 INSTALLATION MANUAL Revision B
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
to highlight the
NMEA 0183 TALKER ID
option, then press the
menu key.
3. Scroll through the three choices using the to make
your selection, and press the key when done.
The interfaced equipment will now receive the 0183 data in the correct
nav-source format.
Setting NMEA 0183
lat/lon precision
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 menu key.
2. Scroll through the three choices using the to make
your selection, and press the key when done.