User's Manual

SPSx50 Modular GPS Receiver User Guide 21
Features and Functions 2
Use and care
The SPSx50 receiver 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 Appendix A, 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 the
SPSx50 receiver: Immediate access to satellite measurements and navigation results is
disabled when the receiver velocity is computed to be greater than 1000 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.