Note, when GNSS Compass is running at very high output rates e.g. 1000 Hz, GNSS Compass Manager can
consume significant system resources handling the large quantity of data.
8.2.3 Installation and Starting
The latest version of GNSS Compass Manager can be downloaded from the GNSS Compass product page of
the Advanced Navigation website..
GNSS Compass Manager does not need to be installed and on a Windows system it can be run from any
directory by simply double clicking on it.
On Linux and MacOS systems it may be necessary to run the application from a terminal window:
java –jar GNSS CompassManager.jar
The GNSS Compass Evaluation Kit includes an FTDI USB to RS232 / RS422 adaptor cable. The drivers are
normally installed automatically, but if not they are available for download from
www.ftdichip.com/Drivers/VCP.htm.
8.2.4 Troubleshooting
If the application will not start, the most common reason is that you have 32-bit Java installed on a 64-bit
operating system. Uninstall Java and reinstall the 64-bit version.
If the globe does not appear in the 3D map area, this indicates that either your graphics card is not powerful
enough, your graphics card driver is out of date, or you have no internet connection.
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Ensure the RS232 / RS422 switch is in the correct mode. The GNSS Compass factory default mode is
RS422.
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Ensure you select the correct COM port. This can be easily identified by unplugging and re-plugging in the
USB connector.
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Ensure you have the correct baud rate selected in GNSS Compass Manager. The factory default value
for the baud rate is 115200 bps for the Primary and Auxiliary ports.
Contact Support if you are having issues.
8.2.4.1 Windows
There is a well known problem with USB serial devices under Windows known as “crazy mouse”. The problem
occurs when the system mistakenly installs the USB serial device as a mouse. Unfortunately Microsoft has not
fixed this problem in over 15 years, so it probably won't be fixed. If you experience this problem, often a restart
will resolve it. Otherwise there is a tool available at
http://www.stentec.com/anonftp/pub/wingps/pnpblockersetup.exe that can fix the issue.
If the serial port does not show up when you plug in the FTDI USB to RS232/RS422 adaptor cable, you may
need to install the drivers from www.ftdichip.com/Drivers/VCP.htm.
When operating GNSS Compass on Windows at a high data rate, data can be lost due to the latency of the
FTDI driver. To resolve this problem the latency of the driver should be reduced to 1 ms:
1. Start the Windows Device Manager (1) and find the Ports section (2).
2. Identify the specific COM port being used (3) by dis-connecting and re-connecting the USB to RS232 /
RS422 adaptor cable.
3. Right click on the identified COM port and select Properties. Select the Port Settings tab (4) and select
Advanced (5).
4. Change the Latency Timer value (6) to 1 msec then press OK (7), and OK again for the previous window.
v2.0 Page 54 04 Nov 2021
GNSS Compass Reference Manual • Configuring and Monitoring GNSS Compass
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