Javad JNSGyro-4T, Руководство оператора

Страница: 74 / 116

4-16 JNSGyro-4T Operator’s Manual www.javad.com
O P E R A T I O N
Clearing the NVRAM
4
Clearing the NVRAM
The board's Non-Volatile Random Access Memory (NVRAM) holds data
required for satellite tracking, such as almanac and ephemeris data, and board
position. The NVRAM also keeps the current board's settings, such as active
antenna input, elevation masks and recording interval, and information about
the board's internal file system.
Even though clearing the NVRAM is not a common (nor normally a
recommended) operation, there are times when clearing the NVRAM can
eliminate communication or tracking problems. Clearing the NVRAM in your
JNSGyro-4T’s boards can be interpreted as a “soft boot” in your computer.
After clearing the NVRAM, your board will require some time to collect new
ephemerides and almanacs (around 15 minutes).
Clearing the NVRAM of your board will reset your board settings to factory
default values.
In addition, the NVRAM keeps information about the board file system. You
can clear the NVRAM using PCView.
Using PCView to Clear NVRAM
Notice: Because the JNSGyro-4T system consists of more than one receiver
boards, NVRAM clearing procedure using PCView should be perform
with every board.
1. Connect your JNSGyro-4T and computer. See “Connecting the
JNSGyro-4T and a Computer” on page 2-3 for this procedure.
2. Start PCView.
3. Click Tools->Clear NVRAM (Figure 4-11).
4. Click OK at the clear NVRAM confirmation dialog box.
Figure 4-11. Tools->Clear NVRAM
The board will automatically disconnect once the NVRAM is cleared.
repeat these steps with all other boards.