Gps 20X Software; Transmitted Nmea 0183 Sentences; Sentence Transmission Rate - Garmin GPS 20x Technical Specifications

3 GPS 20x SOFTWARE INTERFACE
The GPS 20x transmits using the Garmin USB interface. The Garmin USB interface is discussed in the Garmin
Device Interface Specification found in the Garmin Device Interface SDK located on the Garmin Web site at:
www.garmin.com/support/commProtocol.html.
You can configure the GPS 20x to transmit binary data information over the USB interface. Refer to
Garmin Binary Output Format.

3.1 TRANSMITTED NMEA 0183 SENTENCES

The following paragraphs define the sentences that can be transmitted by the GPS 20x using Spanner (an application
that can provide NMEA output via a virtual COM port). Spanner is available for free on the Garmin web site. To
download the software, start at www.garmin.com/oem, select the GPS 20x, and then select Updates & Downloads.
3.1.1

Sentence Transmission Rate

Sentences are transmitted with respect to the user selected baud rate.
The GPS sensor will transmit each sentence once per second. The sentences are not configurable.
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>.
190-00880-00
Sentence Maximum Characters
GPRMC
GPGGA
GPGSA
GPGSV
PGRMT
Table 1: NMEA 0183 Output Sentence Order and Size
GPS 20x Technical Specifications
Page 7
74
82
66
70
50
Appendix B:
Rev. A