Trimble Outdoors aggps 332 Manuel D’Utilisation

6          Troubleshooting

6 2     AgGPS 332 GPS Receiver User Guide

In RTK mode initialization can be lost when 
the rover receiver is close to trees or buildings 
and the number of satellites falls below four. 
Additionally, initialization may be lost if the 
receiver has not been tracking RTK corrections 
for some time. For more information, see the 
next item.

Move away from trees and obstructions to 
initialize. Once initialized, approach the 
obstructed area again. If the obstructions are 
severe, GPS positioning may not work in that 
area. 

Because the GPS satellites move, there may be 
times of the day when you are working in an 
area with obstructions. For more information, 
see the Trimble Planning software on the 
Trimble website (

.

The radio link is down or intermittent. 

• Ensure that the line-of-sight between the 

base and rover receivers is not obstructed.

• Ensure that the rover receiver is within 

range of the radio.

• Ensure that the radio power supply is on.

Strong magnetic fields have no effect on GPS 
or satellite DGPS signals.

However, some computers and other electric 
equipment radiate electromagnetic energy 
that can interfere with a GPS receiver.

If you suspect interference from a local 
magnetic field, move the receiver away from, 
or turn off, the suspect electronics while 
observing the number of satellites being 
tracked on the receiver or the signal-to-noise 
ratio (SNR) of the satellite. If the SNR goes up 
when the electronics are turned off, there may 
be interference from the local electronics.

Transmitting FM 2-way radios can interfere 
with OmniSTAR, WAAS, and GPS signal 
reception. 

Make sure that there is at least 1 m (3 ft) 
between the FM 2-way radio antenna and the 
receiver.