A Troubleshooting
86 DSM 132/132RS Receiver User Quide
A.1 Introduction
This appendix describes some issues or problems that can occur and explains how to solve them. It also contains a series of troubleshooting flowcharts to help in problem solving
A.2 Problems and Solutions
This table lists some problems that can occur and suggests possible solutions.
Problem / issue Possible solution
GPS
Poor accuracy
The accuracy of GPS positions is
poor because the receiver is picking
up poor quality signals from the
satellites.
The receiver always calculates the
most accurate position it can given
the current GPS satellite differential
operating conditions.
Change some or all of the following GPS settings:
Minimum elevation – Increase the setting
(the default is 8°).
Minimum Signal Strength – Increase the System
Mask AMU setting
(the default is 3).
Maximum PDOP – Decrease the setting
(the default is 13).
GPS Mode – Change to Manual 3D
(the default is Auto 2D/3D).
DGPS Mode – Change to DGPS
(the default is DGPS Auto/On/Off).
GPS signals are reflecting off nearby
trees and/or metal buildings and
horizontal surfaces.
To reduce multipath noise, mount the GPS receiver
so that it has a clear view of the sky. The receiver
must be away from trees and large metal objects.