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SPSx51 Modular GPS Receivers User Guide 23
Features and Functions 2
• Operates as an SBAS rover when coverage is available
This receiver is ideal for contractors who operate mid-to-large size projects with
machine control.
Use and care
This product is designed to withstand the rough treatment and tough environment
that typically occurs in construction applications. However, the receiver is a
high-precision electronic instrument and should be treated with reasonable care.
C
CAUTION – Operating or storing the receiver outside the specified temperature range can
damage it. For more information, see Chapter 10, Specifications.
COCOM limits
The U.S. Department of Commerce requires that all exportable GPS products contain
performance limitations so that they cannot be used in a manner that could threaten
the security of the United States. The following limitations are implemented on this
product:
• Immediate access to satellite measurements and navigation results is disabled
when the receiver velocity is computed to be greater than 1,000 knots, or its
altitude is computed to be above 18,000 meters. The receiver GPS subsystem
resets until the COCOM situation clears. As a result, all logging and stream
configurations stop until the GPS subsystem is cleared.