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• See “Managing Receiver Options” for details on
how to check current options.
• Order a new OAF with the desired options ac-
tivated to enable or extend validity of the corre-
sponding receiver options. Contact your dealer or
visit the JAVAD GNSS website for details.
• Refer to the NetView Software Manual for a de-
tailed description of options.
• There are not enough common satellites. In or-
der to obtain a fixed solution, the Base and Rover
should track at least five common satellites.
• Ensure that both the Rover and Base receivers
use the same, and updated, almanac.
• Check the elevation masks of the Rover and Base
receivers; they should be the same. See “TriPad
Configuration” for information on setting the ele-
vation mask.
• A discrepancy exists between the differential
standards used at the Base and Rover receivers.
Ensure the Base and Rover receivers use the same
corrections input/output format:
• Connect your receiver and a computer and start
NetView.
• Click and the Ports tab. Use the same input/out-
put 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 secure-
ly and properly connected to the antenna connec-
tor.
• Check that the radio modem’s antenna is un-
damaged. 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 ac-
cording 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 char-
acteristics 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” .
• The receiver’s memory has no free space.
• Download and/or delete data files to free up
space for new files. Use the AFRM feature.
Technical Support
If the troubleshooting hints and tips in this
Operator’s Manual fail to remedy the problem, con-
tact JAVAD GNSS Support.
Before contacting JAVAD GNSS Customer support
about any problems with the receiver, see “Check
This First!” for some solutions that may fix the issue.
To contact JAVAD GNSS Customer Support use the
QUESTIONS button available on the www.javad.com.
For quick and effective support, provide a detailed
description of the problem.
