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Revision 1.4.16a Page 155
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6.22.1.2 Installation Description
This entry allows you to modify the NMEA 2000 installation description text strings. You can enter
any information you like here, such as the date the unit was installed, or the location in which it was
installed, for later reference. Tools such as Maretron N2KAnalyzer allow you to view these values
later. See section 3.3.4 for details on how to enter a textual value.
6.22.1.3 NMEA0183 Settings
Several characteristics of the NMEA 0183 interface of the SSC200 may be programmed using the
DSM250 display. This can be used for initial programming of a SSC200 compass even if only the
NMEA 0183 interface is to be used after installation is complete. Figure 166 below shows the
possible programming options for the NMEA 0183 interface.
Figure 166 – SSC200 NMEA 0183 Settings Screen
6.22.1.3.1 Baud Rate
The SSC200 compass supports NMEA0183 communication at both 4800 baud and 38400 baud. All
SSC200 Compasses are shipped with a baud rate of 4800 baud. This value may be changed by
selecting the Baud Rate option in the menu, and pressing Enter. The use the Scroll Up and Scroll
Down buttons to select the desired baud rate and press Enter to save the value.
6.22.1.3.2 Sentence / Rate Selection
The NMEA 0183 interface is a very low bandwidth interface. The SSC200 is c
apable of transmitting a
wide variety of NMEA 0183 sentences, and can exceed the bandwidth of the NMEA 0183 interface if
all sentences are transmitted at maximum rates, causing lost data in NMEA 0183 multiplexers or on
the SSC200 interface itself. It is important, therefore, to limit the types of NMEA 0183 sentences
transmitted only to those that are necessary for other products which are connected to the NMEA
0183 interface. Figure 167 below shows the SSC200 NMEA 0183 Settings -> Sentence/Rate
Selection menu. In this menu, you can selectively enable and disable the different NMEA 0183
sentences that the SSC200 can transmit, and you can program the transmission interval for the
enabled sentences. In the figure, you can see that the HDG and ROT sentences will be transmitted
every 0.1 second (10 times/second), the ATT sentence will be transmitted once per second, and the
HDM and HDT sentences are disabled.