Garmin GPS 16-HVS Manuale di istruzioni - Pagina 27

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Appendix D. GPS16-HVS Setups

As configured by Campbell Scientific, the GPS16-HVS will output the NMEA

0183 $GPGGA data string once a second, the PPS signal is enabled with a

duration of 80 milliseconds and the baud rate is set to 1200 baud.

Special software (SNRSRCFG.EXE) is available from Garmin International

for system setup. The GPS16-HVS user manual available from Garmin

International provides technical details beyond the scope of the Campbell

Scientific user manual.

Settings used by Campbell Scientific for GPS16-HVS setup:

GPS Base Model = GPS 16/17

Fix Mode = Automatic

Baud Rate = 1200

Dead Reckon Time = 30 sec

NMEA output time = 1 sec

Position pinning = off

NMEA 2.30 mode = off

Power Save Mode = off (Normal mode)

PPS mode = 1 Hz

PPS Length = 80 mS

Phaze output Data = off

DGPS Mode = WAAS only

Differential mode = Automatic

Earth Datum Index = NGS 84

Selected Sentences = GPGGA

Common changes would be baud rate and selected sentences. The CR1000,

CR3000, CR800, CR850, and CR23X dataloggers can support baud rates

above 1200, which can be beneficial in some applications. The NMEA 0183

GPVTG data sentence gives ground speed and direction, which may be

required for some applications. Changes can be made with the Garmin

software, or with a terminal emulator and the Garmin technical user manual.

Contact Garmin International (www.garmin.com) for either resource.

NMEA Commands for System Setup

Received NMEA strings are commands to the GPS16-HVS which change

some operating parameter. Null fields in the configuration sentence indicate no

change. All sentences are terminated with the carriage return and line feed

characters (CRLF). The CRLF can occur anywhere in the string. The *hh

indicates a checksum which is not required.

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