Javad ALPHA Operator's Manual page 91

• The receiver stores an old almanac.
Update the almanac. See "Collecting Almanacs and Ephemerides" on page 39 for details.
The corresponding receiver options may be disabled or expired (L1/L2, GPS/GLONASS must
be on to track satellites).
• See "Managing Receiver Options" on page 78 for details on how to check current options.
• Order a new OAF with the desired options activated to enable or extend validity of the
corresponding receiver options. Contact your dealer or visit the JAVAD GNSS website for
details.
• Refer to the TriVU Software Manual for a detailed description of options.
The receiver tracks too few satellites
The elevation mask value is too high (above 15 degrees).
• Lower the elevation mask. See "TriPad Configuration" on page 59 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 and start TriVU. See "Connecting the Receiver
and a Computer" on page 33.
• Click Configuration
and click Apply.
• Move to an area free of obstructions, if applicable.
The receiver cannot obtain Code Differential and/or RTK solutions.
Incorrect Base coordinates entered
• Specify the correct coordinates for the Base station using TriVU 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. See
Chapter 3 for details.
• If the receiver should function as a Rover, ensure it has the proper configuration. See
Chapter 3 for details.
The corresponding receiver options may be disabled or expired.
• See "Managing Receiver Options" on page 78 for details on how to check current options.
www.javad.com
Advanced and the Multipath Reduction tab. Enable the two boxes
Troubleshooting
Receiver Problems
91