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Operation
Using the
GPS 16
positioning, then 1-2 minutes afterwards. When WAAS dif-
ferential correction has been received for enough satellites,
the NMEA 0183 data will indicate the availability of a dif-
ferential fi x in the GPGGA sentence. To learn more about
the WAAS system, its satellite positions and current state of
development, visit the FAA web site (http://gps.faa.gov).
Interfaces
The GPS 16 serial Port 1 interface protocol design
is based on the National Marine Electronics Association’s
(NMEA) 0183 ASCII interface specifi cation, which is fully
defi ned in “NMEA 0183, Version 2.0” and the Radio Tech-
nical Commission for Maritime Services “RTCM Recom-
mended Standards For Differential Navstar GPS Service,
Version 2.1, RTCM Special Committee No. 104”. Contact
information to obtain copies of the NMEA and RTCM speci-
fi cations may be found on page 5. The GPS 16 may also be
confi gured to output NMEA 0183, Version 3.0 data. See the
technical specifi cations for more information.
Port 2 is designated for RTCM data input only. Output
on Port 2 is reserved for future use.
The GPS 16 interface protocol also transmits additional
information using the convention of GARMIN proprietary
sentences ($PGRMx). Complete information on GPS 16
capabilities, data transfer, NMEA 0183 sentence formats
and descriptions can be found in the “GPS 16 Technical
Specifi cations” (190-00228-20). You may order a copy of
these specifi cations from GARMIN or your GARMIN dealer,
or you may also download a copy from the manuals section
of the GARMIN web site at www.garmin.com/support/
userManual.html.
The GPS 16 Port 1 is capable of transmitting the follow-
ing NMEA 0183 data sentences:
GPALM, GPGGA, GPGLL, GPGSA, GPGSV, GPRMC,
GPVTG, PGRME, PGRMF, PGRMM, PGRMT, PGRMV and
PGRMB
The GPS 16 Port 1 is capable of receiving the following
NMEA data sentences:
GPALM, PGRMI, PGRMC, PGRMC1, PGRMO and
PSLIB.
The following NMEA
transmitted sentences are
enabled at the factory:
GPGGA, GPGSA, GPGSV,
GPRMC, PGRMB,
PGRME, PGRMM,
PGRMT and PSLIB
F
GPS16 QSG.indd 1/7/02, 4:08 PM12