Receiver Problems
54
P/N: 1011907-01
T
roubles
hoot
ing
The receiver does not lock on to satellites for a long period of time.
The corresponding receiver options may be disabled or expired (satellite signals must be enabled with OAFs).
•
Order a new OAF with the desired options activated to enable or extend validity of the corresponding receiver
options. Contact a dealer or visit the TPS website for details.
•
Refer to the
TRU Online Help
embedded in the software.
The receiver tracks too few satellites.
The survey is conducted near obstructions (tree canopy, tall buildings, and so forth).
•
Check that the multipath reduction check boxes have been selected.
a. Connect the receiver to a computer using a free port (see “Step 2: Connect to a Computer or
Display Unit and RTK Correction Source” on page 13) and start TRU.
b. Open TRU, and connect to the receiver. See “Connect The Receiver to TRU” on page 20.
c. In TRU, click
Receiver Settings
Tracking & Positioning
Adv
tab.
d. Make sure the
C/A code multipath reduction
check box is selected.
•
Move to an area free of obstructions, if possible.
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.
– If the receiver should function as a Base, ensure it has the proper configuration. See “Configure the
Receiver as a Base” on page 27 for details.
– If the receiver should function as a Rover, ensure it has the proper configuration. See “Configure the
Receiver as a Rover” on page 35 for details.
•
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. Contact a dealer or visit the TPS website for details
– Refer to the
TRU Online Help
embedded in the software.
•
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 screen, choose
Receiver Settings
Tracking & Positioning
Obs
tab.
– 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.
a. Connect the receiver to a computer using a free port (see “Step 2: Connect to a Computer or
Display Unit and RTK Correction Source” on page 13) and start TRU.
b. Open TRU, and connect to the receiver. See “Connect The Receiver to TRU” on page 20.
c. In TRU, click
Receiver Settings
Ports
.
d. Double-click on the port to configure, and make sure the
Input Mode
of the rover matches the
format of the
Output Mode
of the base (i.e. RTCM 3.x) See “Configure the Receiver as a Rover”
on page 35 for more information.
•
Poor satellite geometry (PDOP/GDOP values are too high). The recommended value is less than 3.5.
– Conduct a survey when PDOP values are low.
•
The elevation mask is above 15 degrees:
– Lower the elevation mask. To do this, on the TRU main screen, click
Receiver Settings
Tracking &
Positioning
Obs
tab.
– Verify there is a clear view of the sky to allow sufficient satellite tracking.
•
The transmitting and/or receiving antenna may be improperly connected:
– Check that the radio modem’s antenna is securely and properly connected to the antenna connector.
– Check that the radio modem’s antenna is undamaged. If damaged, contact a TPS dealer to replace the
antenna.
