Raven Envizio Pro, Installation & Operation Manual

Page: 64 / 232

Chapter 6
54 Envizio Pro and Envizio Pro II Installation and Operation Manual
The Home screen offers access to the following features of the Envizio Pro or Envizio Pro II field computer:
Note:
The Envizio Pro or Envizio Pro II should be properly shutdown before turning the power off on the
field computer.
GPS Status
The current source and status of DGPS signal is displayed in the upper, left corner of the Home screen.
Note:
The standard GPS shield will be displayed if the Envizio Pro or Envizio Pro II field computer cannot
determine the type of corrections being sent from the DGPS receiver.
The status icon on the Home screen will display:
•
Green if the status of GPS is okay.
•
Yellow if an error or cautionary condition has been encountered.
•
Red if GPS is non-functional. Make sure the DGPS antenna cable connections are secure and the antenna
has a clear, 360° view of the sky.
RTK Fixed and Float Modes
When using an RTK correction source with the internal dual frequency GPS receiver, the GPS status indicator
may be used to determine whether the receiver is operating in RTK fixed or float modes. The RTK shield will
display:
•
Green to indicate a fixed RTK position. This mode indicates that the receiver has a full RTK position fix and
is providing sub-inch corrections.
The GPS Health screen will display a value of 4 for the differential mode when operating in RTK fixed mode.
•
Yellow to indicate that the receiver is operating in RTK float mode. This mode indicates that the receiver is
not able to provide a full RTK position lock due to the distance from the base station, visibility of the sky,
time of day or interference around the base station location. In the float mode, the receiver is still providing
a coarse RTK correction signal, but accuracy of the receiver may not be at a sub-inch level.
The GPS Health screen will display a value of 5 for the differential mode when operating in RTK float mode.
Touch the shield icon to display the GPS Status screen. Refer to the GPS Menu section on page 115 for more
information on the GPS Status screen.
Start or
Resume Job Access the
Tools Menu Shutdown
NovAtel Gl1de
®
or e-Dif
RTK or
CORS
OmniSTAR HP OmniSTAR XP
SBAS
(WAAS/EGNOS) Standard