AQ-300 Operating Manual
17
Appendix C
Earth Datums &
Output Setting
Earth Datums
The AQ-300 is built in earth datum with WGS84.
Setting
Manufacturing Default
Datum:
WGS84.
Baud Rate:
4800.
Output:
GGA, GSA, GSV, RMC.
Baud Rate and Output
Sentences Setting
By SiRF demo
Program
1) Connect your AQ-300 to PC (either COM or USB)
2) Execute SiRFdemo.exe (Program is in the CD)
3) When “Data Source Setup” shows, select the port (COM 1, 2 or 3….)
you used, click “OK”.
4) Click “Action”, select “Open Data Source.” Then you will see lots of
sentences show. All the sentences start with $GPxxxx. This is NMEA
protocol. If you do not see these sentences, please click “View”, “Select
Message”, then click “Development”. The message will appear. If it still
shows nothing, then continue below steps.
5) There is a screen “Selection of Target Receiver Software” might appear,
please select “SiRF Star II”.
6) Click “Action.” Select “Switch to SiRF Protocol”. Then you will see SiRF
binary and the sentences start with #Time, shows every 4 lines and you
can not see the sentences start with $GP. These sentences are for
setting or viewing the GPS receiver’s performance. If your software is
using standard NMEA protocol, please do the following:
7) Click “Action.” Select “Switch to NMEA Protocol”. You will see GGA,
GSV, GSA and RMC in black and the Baud Rate is 4800. These are the
default we put inside the receiver. Please click “OK”. Then you can use it
as a standard GPS receiver. If your software uses different sentence,
please choose the sentences you need.
After above actions, the new setting will be kept in SRAM. If no power
supplied to AQ-300 for more than 30 days, user must re-set again when
power on.
By other SiRF based
demo program
There are a few companies or private websites providing some very good
demo software.
