Javad OMEGA User Manual page 23

• The elevation mask value is too high (above 15
degrees).
• Lower the elevation mask. See "TriPad Config-
uration" for information on setting the elevation
mask.
• The measuring is conducted near obstructions
(tree canopy, tall buildings, etc.).
• Check that the Multipath Reduction boxes have
been enabled.
• Connect your receiver and a computer using a
free port and start NetView.
• Click enable Multipath reduction and click Apply.
• Move to an area free of obstructions, if applica-
ble.
• The receiver cannot obtain Code Differential
and/or RTK solutions.
• Incorrect Base coordinates entered
• Specify the correct coordinates for the Base sta-
tion using NetView or another suitable field data
collection software.
• The receiver is not configured as a Base or Rover.
• If the receiver should function as a Base, ensure
it has the proper configuration.
• If the receiver should function as a Rover, ensure
it has the proper configuration.
• The corresponding receiver options may be dis-
abled or expired.
• 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.
www.javad.com
• 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.
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