User's Manual

6 Troubleshooting
72 Juno SA Handheld User Guide
GPS receiver issues
Problem Cause Solution
The handheld is not
receiving GPS positions.
The integrated GPS
receiver is not activated.
Use the Connect or Activate GPS command in the GPS
field software to open the GPS COM port and activate
the integrated GPS receiver. For more information, see
Using the GPS Receiver, page 57.
The GPS COM port is
already in use. Only one
application at a time can
have the port open.
Do the following:
• Exit the software that is using the GPS COM port
and then retry in your application.
• Check that a GPS application is not running in the
background. Tap / Settings / Memory, select
Running Programs, and then select and close any
GPS applications you are not using.
The GPS field software is
using the wrong GPS COM
port.
Connect to COM4.
Not enough satellites are
visible.
Move to a location where the receiver has a clear view
of the sky and ensure the antenna is not obstructed.
Wait for real-time is
selected in the GPS field
software and the
integrated receiver is
waiting to receive
real-time corrections.
If you are collecting data for postprocessing, clear the
wait for real-time selection.
Check that the real-time correction source is setup
correctly (see Connecting to a real-time differential
correction source, page 62).
Handheld is lying on a
metal surface.
The design and location of the GPS antenna have been
maximized for GPS reception in a typical user
environment. Locating the handheld on a metal surface
without being in contact with the user may cause a
decrease or loss of satellite reception.
Hold the handheld for optimum reception.
NMEA data includes
autonomous positions.
The integrated GPS
receiver outputs
autonomous positions
when real-time
corrections are
unavailable.
Configure the NMEA application to filter out non-DGPS
positions.