Maretron SSC200 - Manual (Page 19)

Revision 1.8 Page 15
® ®
4.4 Variation Source Selection
As shipped from the factory, the SSC200 automatically looks for variation from both the NMEA
0183 and NMEA 2000
®
interfaces. If there is only a single source of variation available (either
from the NMEA 0183 or the NMEA 2000
®
interface), then there is no need to manually select a
variation source. However, if there are multiple variation sources (i.e., variation available from
both the NMEA 0183 and NMEA 2000
®
interfaces) or there is no source for variation (i.e.,
variation is not available from either the NMEA 0183 or the NMEA 2000
®
interfaces), then it is
necessary to select a particular variation source. The SSC200 can be programmed to
specifically use one of three possible variation sources:
1. Variation from Only NMEA 0183 Interface
2. Variation from Only NMEA 2000
®
Interface
3. Variation from Only Manual Entry
The SSC200 can be programmed to accept a specific source for the variation data using one
of two possible procedures.
1. Using a Maretron Display (Section 4.4.1)
2. Through the NMEA 0183 Interface (Section 4.4.2)
4.4.1 Variation Source Selection via Maretron Display
You can program the SSC200 to use a particular variation source using a Maretron display
product (e.g., DSM200). Refer to the display product user’s manual for details on programming
the SSC200 to use a specific variation source.
4.4.2 Variation Source Selection via NMEA 0183 Interface
You can program the SSC200 to use a particular variation source through the NMEA 0183
interface. Refer to Appendix A for details on programming the SSC200 to use a specific
variation source.
5 Rate of Turn
The SSC200 is capable of measuring a vessel’s rate of turn and outputting the information
over both the NMEA 0183 and NMEA 2000
®
interfaces. Furthermore, the SSC200 has a
programmable damping period where the filter time can be increased for very slow turning
vessels such as tugs pushing barges. Also, the SSC200 rate of turn indication may be zeroed
to correct for any temperature-induced offset.
The SSC200 can be programmed with different damping periods and have the rate of turn
indication zeroed using one of two possible procedures.
1. Using a Maretron Display (Section 5.1)
2. Through the NMEA 0183 Interface (Section 5.2)