Evaluation Board of ML8088s Receiver
Operating Manual 2.0
13
The Board Activation
To start working with the evaluation board you have to connect the necessary cables.
The GLONASS/GPS antenna jack has to be plugged into the antenna connector X2 (see Fig.
3 and 5). If you use an indirectly excited antenna, then to ensure best results it has to be plugged
to connector X2 via a minimal length cable (preferably without a cable at all).
A USB cable has to be plugged into a USB connector. The other cable terminal has to be
connected to the computer. Switching on/off the power supply for the evaluation board is done
by connecting/disconnecting the USB interface cable to the receiver connector X1.
After the evaluation board power supply is switched on, the LED HL1 (orange-red light)
indicating the ML8088s module power supply should light up:
Several seconds later (usually no longer than 3 seconds) after the power is on, the LED HL2
(green light) should start blinking and this induces availability of data out at the receiver
ML8088s output TX1, this is a NMEA data output.
If working with a standby power supply from a battery is required, an external supply
battery with 3V nominal voltage should be connected to terminals 21 (-) and 24 (+) to the board
wiring panel (see Fig. 4).
Application Configuration
The Navia viewer application should be run after the board has been connected to the
computer. This is necessary because after the application has been started, it checks all the
available serial ports of the user computer.
If the board is connected to the computer through the same interface connector as during the
previous session, and no changes have been introduced into the board and application
configuration, then you can first run the application and then connect the board. The board can
also be disconnected while the application is running, and then reconnected again.
Some Windows operation system versions can misinterpret the NMEA data traffic, which
can cause the cursor bounce on the screen or the mouse keys react incorrectly, etc. In this case
you have to disconnect the board from the computer and ask the system administrator to
configure the Windows.
When the application is run for the first time (in Fig. 8 you can see in the status bar at the
screen lower part that the serial port is not specified) after it has been installed on the computer, a
message might appear that the data exchange port is not specified (see Fig. 9A). Clicking the OK
button will run the NMEA data port quick identification mode (see Fig. 9B). After the Port
Search button is clicked, all the available ports will be scanned at all exchange speeds, which can
take quite a long time. After NMEA data port has been detected, the port identification message
will be displayed (see Fig. 9B). Click the OK button and then save the determined by the
application parameters by clicking the Save button. Then the port search window will close
automatically,