NorthStar 972 Installation Manual page 30

SECTION SIX: Interfacing the 972 system
sentences—BWC, GLL, and RNN—are included to allow backwards compatibility with
marine equipment designed for this earlier version of 0183).
Selecting NMEA output sentences
When you select
0183 V2.1
output... to see a screen showing all the NMEA 0183 sentences the 972 can output.
Three-letter abbreviations identify each sentence and are listed alphabetically. (For the meaning of
these sentences, see the NMEA interface specifications document published by the NMEA.) The
sentences to be output are followed by the word
indicating that they're off. Some devices can't handle all these sentences correctly, so you can
customize the output here by turning individual sentences on or off. In general, you may want to
turn on only those sentences used by the particular equipment interfaced to the 972.
Turning NMEA output sentences on and off
To turn on or off the 972's NMEA 0183 sentences, first follow the above description to display the
screen, then press the cursor pad to highlight the sentence you want to turn on or off,
0183 sentence
then press On/Off to toggle the sentence on or off. Repeat for each sentence as desired. When you're
finished, press Return to go back to the
If you want to set all the sentences to the factory settings for recommended output, press the Safe
reset menu key. If you want to turn on only a select few sentences for output, press the All off menu
key to turn off all sentences, then turn the desired ones back on.
Choosing the talker ID
The NMEA 0183 standard requires that the equipment you're interfaced to—the "listener"—knows
what type of device is transmitting the data. The 972's talker ID tells the listener that it is receiving
information from a navigation source, not a communications or sensor device—which transmits
completely different forms of data. Certain listening devices will only accept navigation data
identified as coming from specific types of equipment. The 972 lets you set its talker ID to GPS (GP),
or integrated instrument (II) to match what the listener device is expecting:
1. Check the listener device's instruction manual to determine which "talker ID"
codes it will respond to.
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as the output format (after pressing the EDIT menu key) and press NMEA
On;
Port Setup
those that won't be output have two dashes
screen.
972 Installation Manual, Rev. B