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CHAPTER
1
SPSx51 Modular GPS Receivers User Guide 13
Introduction 1
Welcome to the SPSx51 Modular GPS Receivers
User Guide. This manual describes how to set up
and use the Trimble
®
SPSx51 Modular GPS
receivers.
About the SPSx51 receivers
The SPSx51 Modular GPS receiver family
comprises the following receivers:
• SPS551
• SPS551H
• SPS651
• SPS751 Basic base
• SPS751 Basic rover
• SPS751 Max
• SPS851
SPS551 GPS receiver
The Trimble SPS551 is a dual-frequency Location
GPS receiver, which provides up to decimeter
accuracy depending on the augmentation used.
The SPS551 provides decimeter precision when
used in Location RTK mode with RTK
corrections through the internal radio or
Internet. The SPS551 can operate as a DGPS
reference station or as a DGPS rover receiver, and
can use Satellite Based Augmentation Systems
(SBAS). The receiver can also function as a rover
receiver that uses OmniSTAR XP, HP, or VBS
correction services. The SPS551 is ideal for
mobile applications on marine vessels and site
vehicles where Real-Time Kinematic (RTK)
accuracy is not needed. The SPS551 can be used
with the SPS551H GPS receiver to provide both
position and precise heading solutions for
marine applications. The SPS551 can be
upgraded to use GLONASS signals and to use
GPS L2C signals.
SPS551H GPS receiver
The Trimble SPS551H is an add-on receiver that
can be combined with the SPS551, SPS751 Max,
or SPS851 Extreme to provide a precise heading
capability using Trimble moving base technology.
The SPS551H is also available with GLONASS to
provide a robust heading solution in a hostile
environment.
SPS651 Location GPS receiver with
precise vertical accuracy
The SPS651 is a Location GPS receiver with
precise vertical and decimeter horizontal
positioning. The receiver is part of the
vehicle-mounted Trimble Site Supervisor System
and used with the SCS900 Site Controller
Software Tablet Edition it is designed to provide
site supervisors with cost-effective real-time
positioning information.
The SPS651 can operate in all Location GPS
modes including SBAS, DGPS, OmniSTAR
(VBS/HP/XP services), and Location RTK mode.
It can be upgraded to use GLONASS signals and
to use GPS L2C signals.