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4.2 TRANSMITTED NMEA 0183 SENTENCES

The subsequent paragraphs define the sentences that can be transmitted by the GPS 17x HVS.

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:

length of transmission

Sentence

GPRMC

GPGGA

GPGSA

GPGSV

PGRME

GPGLL

GPVTG

PGRMV

PGRMF

PGRMB

PGRMM

PGRMT

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>. For the GPS 17x

HVS, the factory set defaults 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).

190-00885-07

total characters to be transmitted

---------------------------------------------

characters transmitted per second

Output by Default?

Once per minute

Table 2: NMEA 0183 Output Sentence Order and Size

Baud

Characters per Second

4800

9600

19200

38400

Table 3: Characters per Second for Available Baud Rates

GPS 17x HVS Technical Specifications

Page 12

Maximum Characters

480

960

1920

3840

Rev. A