4 operating the gps analyser software – Navman LA000578A User Manual

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4.4 Operating the GPS Analyser software

There are two software packages supplied with the GPS Development Kit: SiRFDemo and

SiRFflash. The VisualGPS program can be obtained free of charge from the VisualGPS website

(www.visualgps.net/VisualGPS/).

4.4.1 VisualGPS

VisualGPS graphically presents the serial data transmitted by the receiver. The receiver output

must be enabled in the NMEA protocol for this software to be used.

To enable the receiver output

1. Open the VisualGPS software installed on the PC.
2. Select the Settings>Communications tab.
3. When the Communications Settings window is displayed, select the correct COM Port and set

the Baud rate to 9600 Baud.

When this has been carried out, and the development unit is powered, raw NMEA data should

appear in the NMEA Monitor Window. For more detailed information on any of the analysis

windows, use the Help function in the top toolbar.

4.4.2 SiRFDemo

SiRFDemo software can provide analysis of receiver output in either SiRF binary or NMEA

protocols. When enabled in NMEA format, the only analysis provided is raw data being

transmitted by the receiver. While the module is transmitting serial data in NMEA format, it is

Figure 4-1 Development unit test equipment

RTCM DGPS

data source

optional connection for logging RTCM data

monitor

antenna

power

optional antenna

or pre-amplifier

development unit