YSI SonTek RiverSurveyor, System Manual

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SonTek/YSI Inc
RiverSurveyor System Manual (May 1, 2007)
33
In the
Systems
dialog box (
Figure 3-13
), select the serial (
Com
) port and
Baud Rate
for your sys-
tem. If the
Automatic Verification
is on (box checked), the RiverSurveyor program will automati-
cally search for a valid GPS data string as soon as the communications settings are entered. If
Automatic Verification
is off, click the Click here to check link in the
Status
column after enter-
ing your communications settings. If valid GPS data are not found on the serial port, the
Status
column will change to Invalid – click here for information . Click the link for information as to
the possible reasons for the problem (see Troubleshooting §
9.3
– GPS Conditions ).
The
Properties
column has a show properties link. Clicking this link opens either the
External
GPS Properties
or
Internal GPS Properties
dialog box depending on the selected row. This dialog
box (
Figure 3-14
) contains the following information:
•
Data Bits / Stop Bits
[External GPS only] – The default settings are 8 and 1 respectively;
however, some systems may use different settings.
•
Enable/Disable Internal GPS
[Internal GPS only] – Use this setting to turn on/off the Internal
GPS on a RiverCat system. The default setting is ON.
•
Magnetic Declination
– The magnetic declination can be read directly from some GPS
strings. For more information, see: Compass Alignment and Magnetic Declination .
•
Show Incoming Data
– The data transmitted from your GPS receiver will be displayed in
real-time (via the RiverCat if Internal GPS is used). If incorrect data (or no data) are being
displayed in the GPS Output box, check your cables, communication settings, and the GPS
receiver unit. Also, when a GPS fix is lost, some GPS systems will output the last good fix
(which can be noted by the measurement time repeating itself). In this case,
RiverSurveyor
will reject the data if the time is not updated for each successive measurement.
•
Troubleshooting
– This option runs a troubleshooting program in case you are unable to get
valid data from your GPS unit. It offers possible problem sources and solutions.
Figure 3-14. External GPS Properties dialog box