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Appendix F – Changing the NMEA0183 Identifier
Transmitted by the SSC300
The identifier for NMEA0183 sentences transmitted by the SSC300 is set by the factory to be "II"; however, some
users may need to change this to other values. This addendum explains how to change the NMEA 0183 identifier
for the SSC300.
Prerequisites:
The SSC300 compass must have firmware revision 1.7 or greater.
Instructions:
1. Connect the SSC300 to the PC's serial port and obtain the "cmd>" prompt per the instructions in
Appendix C.
2. Type the following sentence
$PMAREXE,SSC300,,DF,??,,,
Where ?? is replaced by the two-character identifier you wish the SSC300 to transmit (for example, to
change to a heading of HE, type the sentence
$PMAREXE,SSC300,,DF,HE,,,
*Note: For compasses with firmware revision 1.8 or greater, a NMEA 0183 checksum is optional. For
compasses with earlier firmware revisions, a correct NMEA 0183 checksum is required.
3. Type "exit" or simply power the SSC300 off and then on again. You should now observe sentences being
transmitted using the desired NMEA 0183 identifier.
Appendix F – Changing the NMEA 0183 Identifier
Revision 1.0
Page F1
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