Trimble Juno 3B User Manual

90 Juno Series Handhelds User Guide
GNSS receiver issues
Real-time DGNSS issues
Problem Cause Solution
The handheld is not
receiving GNSS
positions.
The integrated GNSS
receiver is not activated.
Use the Connect or Activate GNSS command in the
GNSS field software to open the GNSS COM port and
activate the integrated GNSS receiver. For more
information, see Using the GNSS receiver, page 72.
The GNSS COM port is
al
ready in use. Only one
application at a time can
have the port open.
Do the following:
• Exit the software that is usi
ng the GNSS COM port
and then retry in your application.
• Check that a GNSS application is not running in the
ba
ckground. Tap / Se
ttings / Memory, select
Running Programs, and then select and close any
GNSS
applications you are not using.
The GNSS field software is
u
sing the wrong GNSS
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
se
lected in the GNSS field
softwar
e and the
i
ntegrated receiver is
waiting to receive
real-time corrections.
If you are collecting data for postprocessing, clear the
wait for r
eal-time selection.
Check that the real-time correction source is setup
correctly
(see
Connecting to a real-time differential
correction source, page 74).
Handheld is lying on a
metal surface.
The design and location of the GNSS antenna have
b
een maximized for GNSS 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 GNSS
receiver outputs
au
tonomous positions
when real-time
corrections are
unavailable.
Configure the NMEA application to filter out
non-DGNSS positions.
Problem Cause Solution
The handheld is not
re
ceiving SBAS
real-time corrections
The SBAS satellite is
obstructed from view.
Check the location of the SBAS satellite in the Skyplot
section of the GNSS field software, and if possible move to a
different location.
You are outside the
W
AAS, EGNOS, or MSAS
coverage area.
Wide Area Augmentation System (WAAS) satellites are
tracked in the Continental United States including Alaska,
and in southern parts of Canada.
European Geostationary Navigation O
verlay Service (EGNOS)
satellites are tracked in Europe.
MTSAT Satellite-based Augmentation System (M
SAS)
satellites are tracked in Japan.

Trimble Juno 3B Specifications

General

Brand	Trimble
Model	Juno 3B
Category	Handhelds
Language	English