Receiver Problems
39
P/N: 1004636-01
Troubleshooting
The receiver cannot obtain Code Differential and/or RTK solutions
•
Incorrect Base coordinates entered.
– Specify the correct coordinates for the Base station using
TRU or another suitable field data collection software.
•
The receiver is not configured as a Base or Rover.
•
The corresponding receiver options may be disabled or expired.
– Order a new OAF with the required options activated to enable or extend validity of the corresponding
receiver options.
– Refer to the
Topcon Receiver Utility
(
TRU) Online Help
for a detailed description of options.
•
There are not enough common satellites. In order to obtain a fixed solution, the Base and Rover should track
at least five common satellites.
– Check the elevation masks of the Rover and Base receivers; they should be the same. To do this, on
the TRU main window, choose Receiver SettingsTrackingObs.
– Verify there is a clear view of the sky to allow sufficient satellite tracking.
•
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:
a. Connect the receiver to a computer and open TRU (see the
Topcon Receiver Utility
(
TRU) Online
Help
).
b. In TRU, connect to the receiver.
c. On the TRU main window, choose Receiver SettingsPorts.
d. Double-click on the port to be configured and make sure the input mode of the Rover matches the
format of the Base output mode (i.e. RTCM3).
•
Poor satellite geometry (PDOP/GDOP values are too high).
– Conduct the survey where satellite visibility is better (low PDOP value).
– Ensure the elevation mask is less than 15 degrees.
•
The elevation mask is above 15 degrees.
– Lower the elevation mask. To do this, on the TRU main window, choose Receiver
SettingsTrackingObs.
– Verify there is a clear view of the sky to allow sufficient satellite tracking.
•
There may be a source of radio interference that disrupts radio communications.
– Change the RF channel (if possible).
– Removing the source of the jamming signal or relocate the radio antennas (if possible).
The receiver does not start logging data
•
The receiver does not have a memory card installed or the memory option is disabled or expired.
– Make sure the memory option is enabled. For details, see the
Topcon Receiver Utility (TRU) Online
Help
.
•
The memory card does not have free space.
– Download and/or delete data files to free up space for new files. See “Downloading and Deleting Files”
on page 36.
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