Javad Prego, Operator'S Manual

Page: 122 / 152

5-4 Prego Operator’s Manual www.javad.com
TR O U B L E S H O O T I N G
Receiver Problems
5
The receiver cannot obtain Code Differential and/or RTK solutions.
Causes Solutions
Incorrect Base
coordinates entered. Specify the correct coordinates for the Base
station using PCView or other 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 “Measuring with the Prego” on
page 3-6 for further information.
• If the receiver should function as a
Rover, ensure it has the proper
configuration. See “Measuring with the
Prego” on page 3-6 for further
information.
The corresponding
receiver options may
be disabled or expired. • See “Checking Options” on page 4-15
for details on how to check current
options.
• Enable or prolong the validity of the
corresponding receiver options by
ordering a new OAF with the desired
options activated.
There are not enough
common satellites. In
order 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. See “Collecting Almanacs” on
page 2-33.
• Check the elevation masks of the Rover
and Base receivers; they should be the
same. See page 2-8 for information on
setting the elevation mask.
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.
• See page 2-8 for information on setting
the elevation mask.