User Guide

4.1.1 NMEA Messages

The serial interface protocol is based on the National

Marine Electronics Association's NMEA 0183 ASCII

interface specification. This standard is fully define in

"NMEA 0183, Version 3.01" The standard may be obtained

from NMEA, www.nmea.org

4.1.2 GGA - GPS FIX DATA

Time, position and position-fix related data (number of

satellites in use, HDOP, etc.).

Format:

$GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,

M,<10>,M,<11>,<12>,*<13><CR><LF>

Example:

$GPGGA,104549.04,2447.2038,N,12100.4990,E,1,06,

01.7,00078.8,M,0016.3,M,,*5C<CR><LF>

APPENDIX B

DEFAULT VALUES

The product has the following factory preset default values:

Datum:000 (WGS-84)

NMEA Enable Switch:GGA ON

GLL ON

GSA ON

GSV ON

RMC ON

VTG ON

Checksum ON

Baud Rate:4800 Baud

Elevation Mask:5 degrees

DOP Mask:DOP Select: Auto

GDOP: 20

PDOP: 15

HDOP: 8

Receiver Operating Mode:Normal Mode (without 1PPS)

Commands can be issued to the HI-204L to change the settings of the

receiver. The new settings will remain effective on next power-on as

long as the on-board rechargeable backup battery is not discharged.

After the backup battery is discharged, factory preset default settings

will be used.