Garmin 16" x Manual De Usuario
190-00228-08
GPS 16x Technical Specifications
Rev. A
Page 14
4.2 TRANSMITTED NMEA 0183 SENTENCES
The subsequent paragraphs define the sentences that can be transmitted on COM 1 by the GPS sensor.
4.2.1 Sentence Transmission Rate
Sentences are transmitted with respect to the user selected baud rate.
The GPS sensor will transmit each sentence (except where noted in particular transmitted sentence descriptions) at a
periodic rate based on the user selected baud rate and user selected output sentences. The GPS sensor will transmit
the selected sentences contiguously. The length of the transmission can be determined by the following equation and
Tables 2 and 3:
periodic rate based on the user selected baud rate and user selected output sentences. The GPS sensor will transmit
the selected sentences contiguously. The length of the transmission can be determined by the following equation and
Tables 2 and 3:
total characters to be transmitted
length of transmission
=
---------------------------------------------
characters transmitted per second
Sentence Output
by
Default? Maximum
Characters
GPRMC
74
GPGGA
82
GPGSA
66
GPGSV
70
PGRME
35
GPGLL
44
GPVTG
42
PGRMV
32
PGRMF
82
PGRMB
40
PGRMM
32
PGRMT
50
Table 2: NMEA 0183 Output Sentence Order and Size
Baud Characters
per
Second
4800 480
9600 960
9600 960
19200 1920
38400 3840
38400 3840
Table 3: Characters per Second for Available Baud Rates
The maximum number of fields allowed in a single sentence is 82 characters including delimiters. Values in the
table include the sentence start delimiter character “$” and the termination delimiter <CR><LF>. The factory set
defaults will result in a once-per-second transmission at the NMEA 0183 specification transmission rate of 4800
baud.
table include the sentence start delimiter character “$” and the termination delimiter <CR><LF>. The factory set
defaults will result in a once-per-second transmission at the NMEA 0183 specification transmission rate of 4800
baud.
Regardless of the selected baud rate, the information transmitted by the GPS sensor is referenced to the one-pulse-
per-second output pulse immediately preceding the GPRMC sentence, or whichever sentence is output first in the
burst (see Table 2 above).
per-second output pulse immediately preceding the GPRMC sentence, or whichever sentence is output first in the
burst (see Table 2 above).