Troubleshooting
Receiver Problems
37www.javad.com
• Connect your receiver and a computer and start NetView. See “Connecting the Receiver and a
Computer” on page 19.
• Click and the Ports tab. Use the same input/output format for both receivers.
• Poor satellite geometry (PDOP/GDOP values are too high).
• Conduct your measuring when PDOP values are low.
• The elevation mask is above 15 degrees.
• Lower the elevation mask.
• The transmitting and/or receiving antenna may be improperly connected.
• Check that the radio modem’s antenna is securely and properly connected to the antenna
connector.
• Check that the radio modem’s antenna is undamaged. If damaged, contact your JAVAD GNSS
dealer to replace the antenna.
• The specified baud rate is incompatible with the baud rates the receiver supports.
• The baud rate is the rate at which the receiver transmits differential messages to the receiver and
vice versa. Change the baud rate to that which your receiver supports.
• The Base and Rover receivers use different radio link parameters.
• Configure the Base and Rover radio receivers according to the procedures listed in the applicable
section.
• The distance between the Base and Rover is too far.
• Close the distance between the Base and Rover.
• Use repeaters to increase radio coverage.
• There may be a source of radio interference that disrupts radio communications.
• Change the RF channel (if possible).
• Use a spectrum analyzer to detect the radio characteristics of the interfering signal and change
your system’s configuration accordingly.
• Remove the source of jamming signal or relocate your radio antennas (if possible).
The receiver does not start data logging
• The memory option is disabled or expired.
• Check that the memory option is enabled. For details, see “Checking an OAF” on page 33.
• The receiver’s memory has no free space.
• Download and/or delete data files to free up space for new files (see “Connecting the Receiver
and a Computer” on page 19 and “Deleting Files” on page 32).
• Use the AFRM feature. See“TriPad Configuration” on page 26.
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